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    Wyświetlanie 1-22 z 22
    Tytuł:
    A morganucodontan mammalia form from the Upper Jurassic Morrison Formation, Utah, USA
    Autorzy:
    Davis, Brian M.
    Jäger, Kai R.K.
    Rougier, Guillermo W.
    Trujillo, Kelli
    Chamberlain, Kevin
    Powiązania:
    https://bibliotekanauki.pl/articles/2216314.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Mammalia
    Morganucodonta
    dentition
    Jurassic
    Morrison Formation
    Opis:
    We describe two skull fragments of a new morganucodontan from the Cisco Mammal Quarry (Upper Jurassic Morrison Formation), preserving portions of the palate and snout in excellent 3D detail as well as the complete upper postcanine dentition. Morganucodontans are best known by isolated elements and relatively complete skulls of several species of Morganucodon from the Lower Jurassic of Wales and China; this group is fundamental to our understanding of the early evolution of mammals. Cifellilestes ciscoensis gen. et sp. nov. possesses derived features of the snout paired with plesiomorphic construction of the molars; the distal premolars are complex and there is an unusually low count (two) of strongly imbricated molars. This character combination expands craniodental variation for the group. We sampled mudstone from the Cisco Mammal Quarry for ash-fall zircon analysis and obtained a date of 151.50 ± 0.28 Ma. This dates the locality to the earliest Tithonian and slightly younger than other major dated mammalbearing localities in the Morrison Formation. Cifellilestes represents one of the youngest members of this group and extends the record of morganucodontans in North America by more than 30 Ma. Morganucodontans are a rare component of Late Jurassic faunas but display surprising dental diversity through variations in a tooth count and cusp morphology of a deeply conserved, generalized mammalian tooth pattern, which was fully established in brasilodontid (non-mammalian) ancestors at least 80 my prior.
    Źródło:
    Acta Palaeontologica Polonica; 2022, 67, 1; 77-93
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dentition and relationships of the Jurassic mammal Shuotherium
    Autorzy:
    Kielan-Jaworowska, Z
    Cifelli, R.L.
    Luo, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/23028.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    molar
    mammal
    dentition
    China
    Shuotherium
    Australosphenida
    Jurassic
    paleontology
    Opis:
    The Middle Jurassic mammal Shuotherium has lower molars that possess a trigonid and talonid, but are unique in having the talonid situated in front of the trigonid, rather than behind it, as in molars of usual tribosphenic pattern. Shuotherium dongi Chow and Rich, 1982 was based on a dentary bearing seven teeth, originally interpreted as three premolars and four molars. Based on comparison with other groups of early mammals, we reinterpret the premolar–molar boundary in the holotype of S. dongi, and propose a dental formula of four (or more) premolars and three molars. The ultimate lower premolar (previously identified as the first molar) has a completely developed trigonid and no talonid or pseudo−talonid. We hypothesize that the mesial cingulid on molars of Australosphenida is a highly plausible structural antecedent to the pseudo−talonid of Shuotherium. This and other shared, derived features support a relationship of Shuotherium and Australosphenida as sister−taxa. We hypothesize that the common ancestor of Shuotherium + Australosphenida had a global distribution no younger than early Middle Jurassic, and that the respective clades diverged prior to full separation of Gondwanan and Laurasian landmasses.
    Źródło:
    Acta Palaeontologica Polonica; 2002, 47, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperdontia: Exploring the developmental abnormality
    Autorzy:
    Arandi, N.Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2098201.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    hyperdontia
    dental abnormality
    supernumerary tooth
    dentition
    developmental abnormality
    Opis:
    Introduction and objective. Hyperdontia is a dental developmental anomaly in which supernumerary teeth exist. These are extra teeth to the normal set of primary or permanent dentitions. This article reviews the current literature on hyperdontia in the permanent dentition. Materials and method. A thorough literature search was carried out using Scopus, PubMed, and Google Scholar databases. Results were reviewed, prioritized, and findings compiled. The key words of the search strategy were: prevalence, case reports, supernumerary, supplemental, distomolars, forth molars, paramolars, parapremolars, mesiodens, and supernumerary lateral incisors. Only articles in English published in peer-reviewed journals were included. Brief description of the state of knowledge. The prevalence of supernumerary teeth varies between and within different populations. They may cause various aesthetic, occlusal, and functional complications and often require an interdisciplinary intervention. Familiarity with such anomalies is essential for the dental practitioner. Recognition and correct identification of the anomaly is important when communicating with other dental team members, especially in the case of a referral to or from another dental office. Moreover, understanding the anomaly is an important factor in determining the course of treatment, if any. Conclusion. It is hoped that this review will provide dental practitioners with an update on the classification, characteristics, and prevalence figures for each type of supernumerary tooth.
    Źródło:
    Journal of Pre-Clinical and Clinical Research; 2020, 14, 4; 178-183
    1898-2395
    Pojawia się w:
    Journal of Pre-Clinical and Clinical Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Highly derived eutherian mammals from the earliest Cretaceous of southern Britain
    Autorzy:
    SWEETMAN, STEVEN C.
    SMITH, GRANT
    MARTILL, DAVID M.
    Powiązania:
    https://bibliotekanauki.pl/articles/945956.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    mammalia
    eutheria
    dentition
    early cretaceous
    purbeck group
    britain
    uk
    Opis:
    Eutherian mammals (Placentalia and all mammals phylogenetically closer to placentals than to marsupials) comprise the vast majority of extant Mammalia. Among these there is a phenomenal range of forms and sizes, but the origins of crown group placentals are obscure. They lie within the generally tiny mammals of the Mesozoic, represented for the most part by isolated teeth and jaws, and there is strongly conflicting evidence from phenomic and molecular data as to the date of origin of both Eutheria and Placentalia. The oldest purported eutherians are Juramaia from the Upper Jurassic of China, and Eomaia and Acristatherium from the Lower Cretaceous, also of China. Based on dental characters and analyses of other morphological and molecular data, doubt has recently been cast on the eutherian affinities of the Chinese taxa and consequently on the date of emergence of Eutheria. Until now, the only tribosphenic mammal recorded from the earliest Cretaceous (Berriasian) Purbeck Group of Britain was the stem tribosphenidan Tribactonodon. Here we document two new tribosphenic mammals from the Purbeck Group, Durlstotherium gen. nov. and Durlstodon gen. nov., showing highly derived eutherian molar characters that support the early emergence of this clade, prior to the Cretaceous.
    Źródło:
    Acta Palaeontologica Polonica; 2017, 62, 4; 657-665
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Możliwości rekonstrukcji uzębienia przy pomocy implantów bikortykalnych : przegląd piśmiennictwa
    The possibilities of dentition reconstruction with the use of bicortical implants : review of literature
    Autorzy:
    Bębenek, K.
    Błaszczyk, A.
    Kiryk, J.
    Kotowski, D.
    Kowalska, K.
    Szczygielski, T.
    Szymonowicz, M.
    Rybak, Z.
    Więckiewicz, W.
    Dobrzyński, M.
    Kosior, P.
    Bryła, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/112469.pdf
    Data publikacji:
    2018
    Wydawca:
    Indygo Zahir Media
    Tematy:
    implant bikortykalny
    rekonstrukcja uzębienia
    implantologia
    bicortical implant
    reconstruction of dentition
    implantology
    Opis:
    Współcześnie implantologia stanowi podstawową metodę zaopatrzenia protetycznego pacjentów z brakami zębowymi, umożliwiając zarówno rehabilitację, jak i rekonstrukcję protetyczną. Implanty cechują się przede wszystkim biozgodnością oraz rozmaitym zastosowaniem klinicznym (wykorzystanie zarówno jako filarów pod prace stałe, jak i do wzmocnienia retencji protez ruchomych). Obok powszechnie stosowanych implantów śródkostnych bazowanych na systemie Brånemarka swoje miejsce znalazły również implanty bikortykalne, oparte o dwie blaszki istoty zbitej, co warunkuje odmienności biomechaniczne oraz kliniczne pracy z tego typu wszczepami. Mogą być one stosowane do odbudowy braków zębowych o rozmaitej etiologii (choroba próchnicowa, periodontopatie, urazy) z bardzo dobrą skutecznością i stanowią alternatywę dla tradycyjnych systemów implantologicznych.
    Nowadays, implantology is the basic metod of prosthetic supply of patients with dental deficiencies. It enables both prosthodontic rehabilitation and reconstruction. Implants are primarly biocompatible and of vast clinical application (both as pillars for fixed prosthesis and as an additional retention for mobile ones). Besides the commonly used intraosseus implants based on Brånemark’s system, bicortical implants were brought to stomatology. Since they rest on both layers of lamina dura, their biomechanics as well as clinical approach differs. They can be used to reconstuct teeth loss of a variety of aetiology (caries, periodontitis, traumas) with very high efficacy and constitute an alternatice to traditional implant systems.
    Źródło:
    Inżynier i Fizyk Medyczny; 2018, 7, 2; 121-124
    2300-1410
    Pojawia się w:
    Inżynier i Fizyk Medyczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Early Devonian ischnacanthiform acanthodian Ischnacanthus gracilis (Egerton, 1861) from the Midland Valley of Scotland
    Autorzy:
    Burrow, C. J.
    Newman, M.
    den Blaauwen, J.
    Jones, R.
    Davidson, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/139010.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Acanthodii
    Ischnacanthus
    Lochkovian
    palaeohistology
    dentition
    fałdopłetwe
    akantody
    lochkov
    dewon wczesny
    paleohistologia
    uzębienie
    Opis:
    Ischnacanthus gracilis (Egerton, 1861), the only ischnacanthiform acanthodian from the Lochkovian Lower Old Red Sandstone of Scotland, is known from hundreds of specimens in institutional collections worldwide. Despite this relative abundance, morphology and histology of its skeletal elements have rarely been investigated. Surface details of spines, dental elements, and scales are often not visible in specimens because they are usually split through the middle. We have examined a broad size range of fish, from 35 mm to 250 mm long. Several intact (not split) specimens have been collected in recent years and acid-prepared to show fine details of the dermal and dental elements. We have also used scanning electron microscopy of scales, jaws and dental elements, denticles and fin spines, and serial thin sectioning of articulated specimens, to document their structure. Some of our notable observations include: identification of ventral lateral lines, double-layered subtessellate calcified cartilage forming the jaws, and the probable occurrence of extraoral tricuspid denticles on the jaws of most fish. Examination of the size range, body proportions and dentition of institutional specimens gives no support for recognising more than one species in the Midland Valley localities.
    Źródło:
    Acta Geologica Polonica; 2018, 68, 3; 335-362
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The heterodonty in euselachian sharks from the Pennsylvanian of Nebraska
    Autorzy:
    Ginter, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/138726.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Euselachii
    dentition
    Carboniferous
    Indian Cave Sandstone
    USA Midcontinent
    uzębienie
    karbon
    jaskinia piaskowa
    USA
    Opis:
    Among the rich material of chondrichthyan microremains from the Indian Cave Sandstone (Upper Pennsylvanian, Gzhelian) near Peru, Nebraska, USA, housed at the Carnegie Museum of Natural History, there occur almost sixty teeth representing Euselachii. They belong to at least seven species, presenting various types of heterodonty. Two new species are described, viz. Ossianodus nebraskensis gen. et sp. nov., whose dentition is similar to that of certain Mesozoic hybodonts, and Sphenacanthus tenuis sp. nov. with minute teeth of protacrodont design. Most of the euselachian teeth served to crush or grind prey, and some had the potential to clutch, but cutting teeth are absent from the fauna.
    Źródło:
    Acta Geologica Polonica; 2016, 66, 3; 299-312
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New features of the snout and orbit of a therocephalian therapsid from South Africa
    Autorzy:
    Sigurdsen, T
    Powiązania:
    https://bibliotekanauki.pl/articles/21325.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Akidnognathidae
    dentition
    Karoo basin
    Therocephalia
    therocephalian therapsid
    South Africa
    tooth
    Therapsida
    Synapsida
    paleontology
    Opis:
    I describe the anterior part of the externally poorly preserved skull of a therocephalian from the Karoo Basin in South Africa, using the method of serial grinding. The skull is incomplete, and its estimated length in life is 130 mm. The skull can be assigned to the Akidnognathidae with some confidence. The stratigraphic age of the specimen and its locality are not known, but the surrounding sediment suggests that it may be from the Upper Permian Dicynodon Assemblage Zone. It has five or six postcanine teeth, and a poorly developed crista choanalis. The sinuses and canals of the snout are recognized, and it is believed that the sinus positioned posteriorly in the snout (posterior maxillary sinus) is homologous with the maxillary sinus of anomodonts and cynodonts. It also shows similarities to the infraorbital canal of early mammals, such as Morganucodon. An anteriorly positioned sinus (anterior maxillary sinus), situated directly behind the canine root, is homologized with the maxillary sinus of gorgonopsians. In addition, I identify the previously undescribed canal (designated anterior maxillary canal), leading from the anterior maxillary sinus antero−dorsally. No evidence for maxilloturbinals was found in contrast to the condition known in the primitive therocephalian Glanosuchus
    Źródło:
    Acta Palaeontologica Polonica; 2006, 51, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New data on the dentition of the scincomorphan lizard Polyglyphanodon sternbergi
    Autorzy:
    Nydam, R L
    Cifelli, R.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/22344.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Polyglyphanodontinae
    dentition
    Polyglyphanodon sternbergi
    Late Cretaceous
    scincomorphan lizard
    Squamata
    lizard
    North America
    paleontology
    Opis:
    Polyglyphanodon sternbergi Gilmore, 1940 is a large−bodied lizard from the Late Cretaceous of North America distinguished by its transversely oriented, interlocking teeth. Initially the teeth of P. sternbergi were described as smooth and blade−like, but recent discoveries of new specimens from the type locality and re−examination of the original material indicate that the chisel−like teeth of P. sternbergi have small, irregular serrations along the blades. These serrations are similar in size to those found on the teeth of the modern herbivorous lizard Iguana iguana and were likely used in a similar manner to crop vegetation, but was also capable of a degree of oral food processing due to the transverse orientation and interlocking arrangement of the dentition of P. sternbergi. Additionally, the presence of transversely oriented teeth with V−shaped blades in the anterior portion of the tooth row of P. sternbergi represents an additional shared characteristic in tooth structure between P. sternbergi and Dicothodon moorensis, Bicuspidon numerosus, and Peneteius aquilonoius; all transversely−tooth polyglyphandontine lizards from the Cretaceous of North America. It appears that the unique dentitions of Polyglyphanodon sternbergi (large teeth with transverse, serrated blades) and Peneteius aquilonius (small teeth with mammal−like specializations) present by the end of the Cretaceous were derived from a bicuspid, transversely oriented precursor tooth with a V−shaped blade.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mandibular dentition in the Late Triassic temnospondyl amphibian Metoposaurus
    Autorzy:
    Konietzko-Meier, D
    Wawro, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/20771.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Silesian region
    Late Triassic
    Metoposaurus diagnosticus krasiejowensis
    mandibular dentition
    Triassic
    Polska
    temnospondyl amphibian
    paleontology
    Opis:
    The Temnospondyli are a large and diverse group of stemtetrapods (sensu Laurin and Reisz 1997) known from the Early Carboniferous to the Early Cretaceous; their remains have been found on all continents, from Greenland to Antarctica. The Metoposauridae are a short−ranging temnospondyl group recorded only from the Late Triassic; they are characterized by an anterior position of the orbits, a broad parasphenoid and a large quadrate foramen. However, unclear is the taxonomic value of the external location of tusks on the dentary. Our analysis of tooth rows in Metoposaurus diagnosticus krasiejowensis from the Triassic (Late Carnian) of Krasiejów (Silesia, SW Poland) shows that the external location of tusks on the dentary is not a synapomorphy for Metoposauridae but a character of great intraspecific variability. Variability of the arrangement of the internal tooth row on the upper jaw has also been observed.
    Źródło:
    Acta Palaeontologica Polonica; 2007, 52, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kielantherium, a basal tribosphenic mammal from the Early Cretaceous of Mongolia, with new data on the aegialodontian dentition
    Autorzy:
    Lopatin, A
    Averianov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/23180.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Kielantherium gobiense
    Early Cretaceous
    mammal
    dentition
    Cretaceous
    Mammalia
    Mongolia
    Aegialodontia
    Tribosphenida
    tribosphenic mammal
    paleontology
    Opis:
    Two additional specimens of the basal tribosphenid mammal Kielantherium gobiense, the first known aegialodont upper molar (possibly M2) and a dentary fragment with m1, are described from the Early Cretaceous Höövör locality in Mongolia. The upper molar shows an initial stage of the protocone development. Kielantherium gobiense has been known from two specimens only, and thus the new material doubles the hypodigm of this species. Kielantherium is clearly not a junior synonym of Aegialodon, as it differs from the latter in having a cusp−like mesiolabial cingulid cuspule f rather than prominent ridge−like precingulid. Kielantherium's lower postcanine dental formula (with four or more premolars and four molars) is distinctive and more primitive than in Peramus and Eutheria which have five premolars and three molars, and Metatheria which have three premolars and four molars.
    Źródło:
    Acta Palaeontologica Polonica; 2007, 52, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New teeth of allotherian mammals from the English Bathonian, including the earliest multituberculates
    Autorzy:
    Butler, P M
    Hooker, J.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/22031.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    English Bathonian
    tooth cusp
    mammal
    tooth
    Allotheria
    Jurassic
    Bathonian
    multituberculate
    Haramiyida
    dentition
    new tooth
    paleontology
    Multituberculata
    Opis:
    Twenty one isolated multituberculate−like teeth are described from the Forest Marble (late Bathonian) of Oxfordshire and Dorset, England. Eighteen are additional to the teeth described as Eleutherodon oxfordensis by Kermack et al. (1998), and three of those are placed in new taxa. Six new molars of Eleutherodon provide further information on variation in size, proportion and root pattern. Millsodon superstes gen. et sp. nov. (family indeterminate), based on first and last lower molars and a referred upper molar, has resemblances to Haramiyidae and Theroteinidae. Kirtlingtonia catenata gen. et sp. nov. (family indeterminate), based on last upper molars and a probable upper premolar, has a slight resemblance to Eleutherodon, and also to M2 of some paulchoffatiid multituberculates. Kermackodon multicuspis gen. et sp. nov. (family Kermackodontidae nov.) and Hahnotherium antiquum gen. et sp. nov. (family Hahnotheriidae nov.) are based on second upper molars, recognised as multituberculate by their horizontal wear and inferred occlusal displacement with respect to m2. A lower molar referred to H. antiquum confirms this. A blade−like lower premolar and an upper premolar with conical cusps, referred to Kermackodon, are multituberculate−like, but distinctive. Divergence between the two Bathonian multituberculates indicates that the order originated much earlier, more probably from a haramiyid than from a morganucodontid source. Mojo is regarded as probably a haramiyid. The Hahnodontidae, which have basined wear, are removed from the Multituberculata to the “Haramiyida”.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Żywienie a próchnica zębów. Cz. II. Wyniki badań histologicznych uzębienia szczurów białych z doświadczalną próchnicą
    Chast II. Rezul'taty gistologicheskikh issledovanijj zubov belykh krys pri ehksperimental'nom karioze
    Nutrition and dental caries. II. Histological picture of teeth in the rat with experiment dental caries
    Autorzy:
    Opuszynska, T.
    Obersztyn, A.
    Szczygiel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/876570.pdf
    Data publikacji:
    1962
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    zeby
    prochnica zebow
    uzebienie
    zywienie zwierzat
    szczury
    badania histologiczne
    tooth
    tooth decay
    dentition
    animal feeding
    histological analysis
    rat
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1962, 13, 1
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The teeth of the unenlagiine theropod Buitreraptor from the Cretaceous of Patagonia, Argentina, and the unusual dentition of the Gondwanan dromaeosaurids
    Autorzy:
    Gianechini, F.A.
    Makovicky, P.J.
    Apesteguia, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/20408.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    tooth
    unenlagiine theropod
    theropod
    Buitreraptor
    Cretaceous
    Patagonia
    Argentina
    dentition
    Gondwanan dromaeosaurid
    dromaeosaurid
    Theropoda
    Dromaeosauridae
    Unenlagiinae
    Dinosauria
    paleontology
    dinisaur tooth
    Opis:
    The Unenlagiinae is a clade of Gondwanan dromaeosaurid theropods mainly known from incomplete skeletal material. The group includes two recently discovered theropods, Buitreraptor and Austroraptor, from which cranial remains are available with in situ maxillary and dentary teeth, thus allowing the study of tooth morphology. Among the derived traits that diagnose the dentition of unenlagiines are: (i) high tooth count, (ii) small size of individual teeth when compared with skull height, (iii) absence of denticles and carinae, and (iv) presence of longitudinal grooves on the tooth crown. This suite of dental characteristics, shared between Buitreraptor and Austroraptor, can be considered as diagnostic of the Unenlagiinae or, at least, a more exclusive clade within the group. The teeth of Buitreraptor exhibit a remarkable labiolingual compression, whereas Austroraptor possesses more conical teeth, probably respective autapomorphic features. On one hand, these dental morphologies differ from those observed in most Laurasian dromaeosaurids and, for instance, could be considered as further proof of the purported vicariant evolution of the lineage on the southern continents. On the other hand, the morphological similarities (e.g., absence of denticles) between the teeth of unenlagiines and other theropod lineages, including Mesozoic birds and ornithomimosaurs, can be considered as the result of parallel trends related to dental reduction.
    Źródło:
    Acta Palaeontologica Polonica; 2011, 56, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First Mesozoic record of the stingray Myliobatis wurnoensis from Mali and a phylogenetic analysis of Myliobatidae incorporating dental characters
    Autorzy:
    Claeson, K.M.
    O'Leary, M.A.
    Roberts, E.M.
    Sissoko, F.
    Bouare, M.
    Tapanila, L.
    Goodwin, D.
    Gottfried, M.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/20545.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    first record
    Mesozoic
    stingray
    Myliobatis wurnoensis
    Mali
    phylogenetic analysis
    Myliobatidae
    dentition
    Chondrichthyes
    Myliobatiformes
    batoid fish
    fish
    Cretaceous
    Maastrichtian
    Opis:
    New specimens, including the first record of lower dental plates, of the extinct myliobatid Myliobatis wurnoensis were recovered from the Maastrichtian (Late Cretaceous) of the Iullemmeden Basin, Mali, and are the oldest record of the taxon. We evaluated the phylogenetic position of this taxon with reference to other myliobatids (extinct and extant) using osteology and dentition. Our results indicate that Myliobatinae and Myliobatis are each paraphyletic, and that Aetobatus and Rhinoptera are monophyletic. We also found that taxa known only from the Cretaceous, Brachyrhizodus and Igdabatis, are highly nested within Myliobatidae. The phylogenetic position of these taxa unambiguously extends the origin of Myliobatidae and most of its representative taxa into the Mesozoic.
    Źródło:
    Acta Palaeontologica Polonica; 2010, 55, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First evidence of a neonate dentition in pareiasaurs from the Upper Permian of Russia
    Autorzy:
    Kordikova, E G
    Khlyupin, A J
    Powiązania:
    https://bibliotekanauki.pl/articles/22530.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    locality
    Ursulov Formation
    Upper Permian
    skull fragment
    skeleton
    adult specimen
    neonate
    Pareiasauridae
    fossil record
    Vyatka River
    dentition
    Russia
    Deltavjatia vjatkensis
    Opis:
    Finds of juvenile parareptiles are rare in the fossil record. We describe partial upper dentition with large vacuities between bones belonging to a neonate pareiasaur (preserved skull fragment is 22.4 mm long). The specimen was collected within 5 m from a skeleton of an adult specimen of Deltavjatia vjatkensis (Hartmann-Weinberg, 1937) (Pareiasauridae) from red calcareous mudstones in the upper part of the Vanyushonkov Member of Ursulov Formation (Upper Permian, Upper Tatarian substage, Vishkil'skiy regional stage) of Kotel'nich locality, Vyatka River region, Russia. Referral to Deltavjatia vjatkensis is based on the presence of heterodont dentition: spatulate maxillary, triconodont vomerine and conical, palatine and pterygoid teeth located on well-developed palate ridges. This is the first positively identified record of the neonate pareiasaur dentition.
    Źródło:
    Acta Palaeontologica Polonica; 2001, 46, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vertebral morphology, dentition, age, growth, and ecology of the large lamniform shark Cardabiodon ricki
    Autorzy:
    Newbrey, M.G.
    Siversson, M.
    Cook, T.D.
    Fotheringham, A.M.
    Sanchez, R.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/21003.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    morphology
    dentition
    age
    growth
    ecology
    large lamniform shark
    Cardabiodon ricki
    Cardabiodon venator
    Chondrichthyes
    Lamniformes
    Archaeolamna
    Squalicorax
    Cretaceous
    Cenomanian
    Turonian
    Australia
    Opis:
    Cardabiodon ricki and Cardabiodon venator were large lamniform sharks with a patchy but global distribution in the Cenomanian and Turonian. Their teeth are generally rare and skeletal elements are less common. The centra of Cardabiodon ricki can be distinguished from those of other lamniforms by their unique combination of characteristics: medium length, round articulating outline with a very thick corpus calcareum, a corpus calcareum with a laterally flat rim, robust radial lamellae, thick radial lamellae that occur in low density, concentric lamellae absent, small circular or subovate pores concentrated next to each corpus calcareum, and papillose circular ridges on the surface of the corpus calcareum. The large diameter and robustness of the centra of two examined specimens suggest that Cardabiodon was large, had a rigid vertebral column, and was a fast swimmer. The sectioned corpora calcarea show both individuals deposited 13 bands (assumed to represent annual increments) after the birth ring. The identification of the birth ring is supported in the holotype of Cardabiodon ricki as the back-calculated tooth size at age 0 is nearly equal to the size of the smallest known isolated tooth of this species. The birth ring size (5-6.6 mm radial distance [RD]) overlaps with that of Archaeolamna kopingensis (5.4 mm RD) and the range of variation of Cretoxyrhina mantelli (6-11.6 mm RD) from the Smoky Hill Chalk, Niobrara Formation. The revised, reconstructed lower jaw dentition of the holotype of Cardabiodon ricki contains four anterior and 12 lateroposterior files. Total body length is estimated at 5.5 m based on 746 mm lower jaw bite circumference reconstructed from associated teeth of the holotype.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A small camelid Hemiauchenia from the Late Pleistocene of Hidalgo, central Mexico
    Autorzy:
    Bravo-Cuevas, V.M.
    Jimenez-Hidalgo, E.
    Cuevas-Ruiz, G.E.
    Cabral-Perdomo, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/22741.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    small camelid
    camelid
    Hemiauchenia
    Late Pleistocene
    Hidalgo
    Mexico
    Camelidae
    Pleistocene
    paleontology
    geological setting
    systematics
    mandible
    dentition
    postcranial bone
    remains
    tooth
    fossil
    Opis:
    Pleistocene camels from Mexico include representatives of llamas and camels. Their record spans from the Early Blancan to the Late Pleistocene, based on several localities in the northern, northwestern and central parts of the country, with members of the genus Hemiauchenia being particularly well represented. New specimens of a small llama, collected in the state of Hidalgo, central Mexico, are assigned to Hemiauchenia gracilis owing to a combination of cranial and postcranial characters, including a short upper premolar−molar series, the presence of a two−rooted P3, molars covered by a thin layer of cementum, U−shaped molar crescents, well−developed styles and ribs, a small degree of crenulation, a relatively short lower tooth row, the lack of p1 and p3, weakly developed anteroexternal stylids, a shallow and slender mandible, and long and slender metatarsals and phalanges. The material described here extends the Pleistocene geographic distribution of H. gracilisfrom northern to central Mexico, and its biochronological range from the Early Blancan to the Late Pleistocene (Rancholabrean), thus making it the southernmost record and the geochronologically youngest occurrence of this species in North America. The mesowear pattern of the material from Hidalgo suggests that these animals were mainly browsers. Their estimated body mass resembles that of Blancan specimens from Guanajuato, implying that this species maintained approximately the same body mass throughout its biochronological range in central Mexico.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ rodzaju podawanych tłuszczów na występowanie zmian w zębach i przyzębiu szczurów
    Vlijanie raznykh zhirov na izmenenija v zubakh i prizubnykh prostranstvakh u belykh krys
    Effect of different dietary fats on incidence of dental and gungival changes in rats
    Autorzy:
    Wysocki, E.
    Ziombski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/871588.pdf
    Data publikacji:
    1963
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    zwierzeta doswiadczalne
    szczury
    uzebienie
    zeby
    przyzebie
    ubytki
    prochnica zebow
    zywienie zwierzat
    experimental animal
    rat
    dentition
    tooth
    periodontal change
    tooth decay
    tooth loss
    animal feeding
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1963, 14, 4
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wyrzynanie się zębów mlecznych – symptomy towarzyszące czy przypadkowe współistnienie w czasie?
    Primary tooth eruption – teething-associated or coincidental symptoms?
    Autorzy:
    Torlińska-Walkowiak, Natalia
    Rataj-Kulmacz, Agata
    Powiązania:
    https://bibliotekanauki.pl/articles/1032980.pdf
    Data publikacji:
    2013
    Wydawca:
    Medical Communications
    Tematy:
    deciduous dentition
    paediatric dentistry
    primary teeth
    teething-associated symptoms
    tooth eruption
    uzębienie mleczne
    wyrzynanie się zębów
    zęby mleczne
    objawy towarzyszące ząbkowaniu
    matologia dziecięca
    stomatologia dziecięca
    Opis:
    Teething is a part of the body growth and maturity process and is affected by many factors, both local and systemic. This paper attempts to evaluate possible relationship between teething and concurrent local or systemic symptoms, basing on the data presented by literature. Teething has been the focus of study for paediatricians and paediatric dentists alike for decades now. Nevertheless, the question whether some symptoms concurrent with teething are related to it or just occurring accidentally in time has never been answered. Among main possible concurrent symptoms and signs are: biting, drooling, gum-rubbing, sucking, irritability, wakefulness, ear-rubbing, facial rash, decreased appetite for solid foods, mild temperature, congestion, sleep disturbance, stool looseness, increased stool number, decreased appetite for liquids, cough, rash other than facial rash, fever, vomiting. Teething observations are usually done as a retrospective study, on groups comprising various number of members. The compiled data are noted by parents, rather than qualified medical staff. Available literature does not give a clear answer if teething is preceded by symptoms or signs exclusively specific to it. It is assumed that no symptom can be considered prodromal of teething and in every individual case different potential causative factors should be taken into account, while severe systemic symptoms require medical consultation.
    Wyrzynanie się zębów jest powiązane z ogólnym procesem wzrastania i dojrzewania organizmu człowieka, a warunkuje je wiele czynników ogólnych i miejscowych. Celem tej pracy jest próba oceny zależności między wyrzynaniem się zębów a towarzyszącymi objawami miejscowymi lub ogólnymi w oparciu o dane z piśmiennictwa. Należy zauważyć, że choć zagadnienia związane z ząbkowaniem przyciągają uwagę zarówno pediatrów, jak i stomatologów dziecięcych od dziesiątek lat, to jednak do tej pory nie została wyjaśniona kwestia, czy występujące zaburzenia są spowodowane tym procesem, czy przypadkowo współistnieją w czasie. Wśród potencjalnych objawów współistniejących wymienia się głównie: ślinienie, nagryzanie, pocieranie dziąseł, ssanie, zwiększoną drażliwość, czuwanie, pocieranie ucha, zmniejszenie apetytu na pokarmy stałe lub płyny, wysypkę na twarzy lub poza jej obszarem, umiarkowane zwiększenie temperatury, gorączkę, przekrwienie błony śluzowej jamy ustnej, zaburzenia snu, luźne stolce, zwiększenie liczby wypróżnień, kaszel i wymioty. Obserwacje ząbkowania u dzieci prowadzone są najczęściej retrospektywnie, na grupach o różnej liczebności. Dane odnotowują rodzice, rzadziej wykwalifikowany personel medyczny. Z dostępnych w piśmiennictwie informacji nie wynika, by wyrzynanie się zębów było poprzedzone swoistymi objawami. Przyjmuje się, że skoro żaden symptom nie może być uznany za zwiastun zbliżającego się ząbkowania, każdorazowo powinny być uwzględnione inne potencjalne czynniki wywołujące dolegliwości, a nasilone objawy ogólnoustrojowe wymagają konsultacji lekarskiej
    Źródło:
    Pediatria i Medycyna Rodzinna; 2013, 9, 3; 272-275
    1734-1531
    2451-0742
    Pojawia się w:
    Pediatria i Medycyna Rodzinna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Żywienie a próchnica zębów. V. Wpływ uzupełniania niedoborowej diety próchniczo-twórczej w witaminy A, D, E oraz białko i wapń na rozwój zmian w układzie kostnym i uzębieniu szczurów białych
    Pitanie i karios zubov. V. Vlijanie dopolnenija (obogashhenija) vitaminami A, D i E a takzhe belkom i kalciem kariozotvornojj diety, na razvitie peremen v skelete i zubakh belykh krys
    Nutrition and dental caries. V. Effects of supplementation of cariogenic diet with vitamins A, D and E, with protein, and with calcium on the development of changes in bones and teeth of rats
    Autorzy:
    Szczygiel, A.
    Kossakowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/873001.pdf
    Data publikacji:
    1963
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    zywienie zwierzat
    szczury biale
    niedobor witamin
    dieta
    witamina A
    witamina D
    witamina E
    bialko
    wapn
    prochnica zebow
    uzebienie
    animal feeding
    black rat
    vitamin deficiency
    diet
    vitamin A
    vitamin D
    vitamin E
    protein
    dentition
    tooth decay
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1963, 14, 1
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena stanu odżywienia dzieci w jednej ze szkół podstawowych w województwie poznańskim
    Ocenka sostojanija pitanija detejj v odnojj iz nachal'nykh sel'skikh shkol v poznanskom vojevodstve
    Appraisal of the nutritional status in children from one primary school of Poznan District
    Autorzy:
    Szczygiel, A.
    Simbierowicz, Z.
    Konieczna, W.
    Pudlik-Pankiewicz, K.
    Ksiezny, S.
    Dietl, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/877303.pdf
    Data publikacji:
    1962
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    dzieci szkolne
    stan odzywienia
    dzieci wiejskie
    sytuacja gospodarcza
    sytuacja spoleczna
    stan zdrowotny
    masa ciala
    wzrost
    postawa ciala
    budowa ciala
    uzebienie
    poziom hemoglobiny
    wzrok
    niedobor witamin
    woj.poznanskie
    school child
    nutritional status
    rural child
    economic situation
    social situation
    health condition
    body weight
    growth
    body posture
    body structure
    dentition
    vitamin deficiency
    Poznan voivodship
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1962, 13, 4
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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