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Wyświetlanie 1-15 z 107
Tytuł:
An Early Jurassic insect fauna in the Holy Cross Mountains
Autorzy:
Wegierek, P
Zherikhin, V V
Powiązania:
https://bibliotekanauki.pl/articles/21327.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
plant fossil
Mesozoic
fauna
locality
Polska
fossil insect
Early Jurassic
Holy Cross Mountains
Kielce town
insect
Jurassic
paleontology
Źródło:
Acta Palaeontologica Polonica; 1997, 42, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New osteostracans from the Lower Devonian terrigenous deposits of Podolia, Ukraine
Autorzy:
Voichyshyn, V
Powiązania:
https://bibliotekanauki.pl/articles/20783.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Ukraine
new osteostracan
Agnatha
osteostracan
Devonian
Lower Devonian
morphology
deposit
Podolia
taxonomy
paleontology
Osteostraci
Opis:
New osteostracans (Agnatha, Osteostraci) Zenaspis dzieduszyckii sp. nov. and Wladysagitta janvieri gen. et sp. nov., as well as new form of Diademaspis are described from the Lower Devonian of Podolia (Ukraine). Among them Zenaspis dzieduszyckiisp. nov. differs from all other representatives of the genus by its smaller overall size and relatively larger orbits. Wladysagitta janvieri is remarkable by having a rostral process. This new species together with “Cephalaspis” acutirostris Stensiö, 1932 from Old Red deposits of Shropshire (Great Britain) are proposed to be united under common generic name Wladysagitta. Since Diademaspis sp. is completely unknown in outline of its shield, it could not be named as new species, although it should be a really new form. New diagnostic features, such as relative width of the orbits, relative width of the dorsal field, and the position of the posterior end of the lateral fields relatively to the margins of the headshield, are proposed to differentiate genera within the Zenaspididae. Probably, the rostral process of osteostracans should be considered as a multifunctional device having at least a sensory function for food−search, possibly hydrodynamic functions, or may play a role in scaring predators.
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 ichthyosaur Platypterygius hercynicus and its implications for the validity of the genus
Autorzy:
Fischer, V.
Powiązania:
https://bibliotekanauki.pl/articles/21160.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
ichthyosaur
Platypterygius hercynicus
validity
Ichthyosauria
Ophthalmosauridae
Cretaceous
France
paleontology
Opis:
The description of a nearly complete skull from the late Albian of northwestern France reveals previously unknown anatomical features of Platypterygius hercynicus, and of European Cretaceous ichthyosaurs in general. These include a wide frontal forming the anteromedial border of the supratemporal fenestra, a parietal excluded from the parietal foramen, and the likely presence of a squamosal, inferred from a very large and deep facet on the quadratojugal. The absence of a squamosal has been considered as an autapomorphy of the genus Platypterygius for more than ten years and has been applied to all known species by default, but the described specimen casts doubt on this putative autapomorphy. Actually, it is shown that all characters that have been proposed previously as autapomorphic for the genus Platypterygius are either not found in all the species currently referred to this genus, or are also present in other Ophthalmosauridae. Consequently, the genus Platypterygius must be completely revised.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taxonomy, nomenclature, and evolution of the early schubertellid fusulinids
Autorzy:
Davydov, V.
Powiązania:
https://bibliotekanauki.pl/articles/21821.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Carboniferous
Eoschubertella
Foraminifera
Fusulinida
Permian
Schubertella
Schubertellidae
evolution
nomenclature
paleontology
schubertellid fusulinid
systematics
taxonomy
Opis:
The types of the species belonging to the fusulinid genera Schubertella and Eoschubertella were examined from publications and type collections. Eoschubertella in general possesses all the features of Schubertella and therefore is a junior synonym of the latter. However, the concept of Eoschubertella best describes the genus Schubertina with its type species Schubertina curculi. Schubertina is closely related to the newly established genus Grovesella the concept of which is emended in this paper. Besides Schubertella, Schubertina, and Grovesella, the genera Mesoschubertella, Biwaella are reviewed and three new species, Grovesella nevadensis, Biwaella zhikalyaki, and Biwaella poletaevi, are described. The phylogenetic relationships of all Pennsylvanian–Cisuralian schubertellids are also proposed. Barrel−shaped Grovesella suggested being the very first schubertellid that appears sometimes in the middle–late Bashkirian time. In late Bashkirian it is then developed into ovoid to fusiform Schubertina. The latter genus gave rise into Schubertella in early Moscovian. First Fusiella derived from Schubertella in late Moscovian, Biwaella—in early Gzhelian and Boultonia—in late Gzhelian time. Genus Mesoschubertella also developed from Schubertella at least in Artinskian, but may be in late Sakmarian.
Źródło:
Acta Palaeontologica Polonica; 2011, 56, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Colour patterns in Early Devonian cephalopods from the Barrandian Area: Taphonomy and taxonomy
Autorzy:
Turek, V
Powiązania:
https://bibliotekanauki.pl/articles/21864.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
colour pattern
Early Devonian
Devonian
cephalopod
Barrandian area
taphonomy
taxonomy
Bohemia
paleontology
Cephalopoda
Nautiloidea
fossil
Opis:
Five cephalopod specimens from the Lower Devonian of Bohemia (Czech Republic) preserve colour patterns. They include two taxonomically undeterminable orthoceratoids and three oncocerid nautiloids assigned to the genus Ptenoceras. The two fragments of orthocone cephalopods from the lowest Devonian strata (Lochkovian, Monograptus uniformis Zone) display colour patterns unusual in orthoceratoids. They have irregular undulating and zigzag strips that are preserved on counterparts of adapertural regions of specimens flattened in shale, despite their original aragonitic shell having been completely dissolved. These are probably the result of the proteinous pigment inside the shell wall, being substituted during diagenesis by secondary minerals leaving only an altered trace of the original shell. Orthoceratoids from sediments unsuitable for preservation of this feature discussed here thus demonstrate an exceptional case of preservation of colour patterns, not only within Devonian cephalopods but also within other Devonian molluscs. Three specimens of Ptenoceras that preserve colour patterns come from younger Lower Devonian strata. Oblique spiral adaperturally bifurcating bands are preserved in P. alatum from the Pragian and zigzags in P. nudum from the Dalejan. Juvenile specimen of Ptenoceras? sp. from the Pragian exhibits highly undulating transversal bands—a pattern resembling colour markings in some Silurian oncocerids. Dark grey wavy lines observed on the superficially abraded adapical part of a phragmocone of nautiloid Pseudorutoceras bolli and interpreted formerly to be colour markings are here reinterpreted as secondary pigmented growth lines. Other Devonian fossils including a single brachiopod and several gastropods from the Barrandian Area with preserved colour patterns are mentioned. Variety of cephalopod colour patterns, their taxonomic significance, function and significance for palaeoecological interpretation, palaeoenvironmental conditions favouring colour pattern preservation and systematic affiliation of taxa with colour pattern preserved are discussed.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 3; 491-502
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An atypical Silurian myodocope ostracod from the Armorican Massif, France
Autorzy:
Perrier, V.
Powiązania:
https://bibliotekanauki.pl/articles/22621.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Silurian
paleontology
myodocope ostracod
ostracod
Armorican Massif
France
Arthropoda
Crustacea
Ostracoda
Myodocopa
Entomozoidae
taxonomy
Opis:
A new myodocope ostracod Sineruga insolita gen. et sp. nov. is herein described from the Armorican Massif (France). Sineruga resembles Silurian myodocopes (i.e., bolbozoids and cypridinids) in having anterior features (thinner carapace) possibly related to vision. On the other hand, it resembles entomozoid ostracods in having a bean−shaped outline along with a deep adductorial sulcus and a simple muscle spot, but lacks their characteristic ribbed ornament. The data available suggest that Sineruga insolita was probably an atypical, non−ribbed member of the entomozoids thus indicating that early entomozoids may have had smooth representatives. Comparisons with other Recent and fossils ostracods show that the presence of a rostrum and/or symmetrical vision related carapace features (i.e., indicating lateral eyes) can be used as diagnostic characters for myodocope ostracods. The position and shape of the dorsal connection and to a lesser extent that of the sulcus and the adductorial muscle scar can be used to discriminate the higher groups of Silurian myodocopes (bolbozoids, cypridinids, and entomozoids).
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aalenian to Cenomanian terrestrial palynofloras of SW Scania, Sweden
Autorzy:
Vajda, V
Powiązania:
https://bibliotekanauki.pl/articles/23372.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
pollen
palynoflora
Cenomanian
Cretaceous
paleovegetation
palynology
Scania
Sweden
paleoclimate
marine condition
spore
paleontology
Opis:
I describe dispersed miospore assemblages recovered from 35 drill-core samples from Höllviken 2, Norrevång 1, and Svedala 1 wells, all in SW Scania, Sweden. Over eighty taxa of pollen and spores, ranging from the Aalenian to the Cenomanian were identified. Four pollen/spore zones have been defined on the basis of key taxa and on the variation in the frequency of miospore groups. The palynofacies analysis indicates that a continental depositional environment prevailed during the Aalenian in Scania. A stratigraphic hiatus existed from the Aalenian then on until the Valanginian, when the depositional environment subsequently became marine. The marine conditions continued until the Cenomanian. A gradual increase in marine palynomorphs is found in the Cenomanian succession, indicating a transgression. On the basis of the palynoflora it is suggested that the vegetation consisted of cycads, conifers, pteridophytes and a very limited number of angiosperms.
W pracy opisano rozproszone zespoły miospor pochodzące z 35 próbek rdzeni wiertniczych z otworów Höllviken 2, Norrevång 1 i Svedala 1, położonych w południowo-zachodniej Skanii, w Szwecji. Oznaczono ponad osiemdziesiąt taksonów pyłku i zarodników, wieku od aalenu po cenoman. Wyznaczono cztery poziomy pyłkowo-zarodnikowe na podstawie taksonów przewodnich i zmian częstości występowania poszczególnych grup miospor. Analiza palinofacjalna wskazuje, że w aalenie przeważało w Skanii kontynentalne środowisko sedymentacyjne. Luka stratygraficzna trwała od aalenu do walanżynu, kiedy to zapanowal morski reżim sedymentacyjny, trwający aż do cenomanu. Stopniowy wzrost udziału form morskich w sukcesji cenomańskiej wskazuje na transgresję. Zbadana palinoflora wskazuje na to, że w kredzie przeważaly na badanym obszarze sagowce, szpilkowe, paprotniki i nieliczne okrytozalążkowe.
Źródło:
Acta Palaeontologica Polonica; 2001, 46, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evolution of early Spermophilus in eastern Europe and the antiquity of the Old World ground squirrels
Autorzy:
Sinitsa, M.V.
Pogodina, N.V.
Powiązania:
https://bibliotekanauki.pl/articles/21181.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Spermophilus is the most diverse and abundant genus of Eurasian sciurids. Even though many species have been described, the early evolution of the group is poorly understood. Here we present a review of the evolution and taxonomy of early Spermophilus, based on analysis of more than 1500 specimens from the late Pliocene and Early–Middle Pleistocene of Ukraine and European Russia, representing the most complete and continuous fossil record of the early Old World ground squirrels known to date. In addition to documenting previously unpublished specimens of Spermophilus nogaici, we describe a new species, Spermophilus praecox sp. nov., the oldest member of the genus, from the late Pliocene and Early Pleistocene (middle Villanyian to earliest Biharian) of southern Ukraine. It is intermediate in size between a somewhat smaller Spermophilus nogaici and larger Spermophilus polonicus and Spermophilus primigenius. Morphologically, the new species can be distinguished from all known Spermophilus by the retention of primitive traits including a small P3; rudimentary lingual metaloph; large metaconule and mesostyle; presence of P4–M2 endoloph; and premolariform p4 lacking a lingual metalophid. The patterns of dental evolution in eastern European early Spermophilus throughout 2.15 My indicates the existence of a single gradually evolving S. praecox–S. nogaici lineage characterized by a decrease of molar size but enlargement of premolars; the tendency toward high-crowned teeth with more expanded anterior and reduced posterior lobes; well-developed transverse ridges and anterostyles; reduced endolophs, anteroconules, metaconules, and mesostyles of P4–M2; molariform p4; complete m1–m2 metalophids; and stronger m3 hypoconid, hypoconulid, and entoconulid. Dental character regression suggests that Spermophilus evolved from a relatively largesized sciurid having generalized Otospermophilus-like dentition, probably an unknown North American member of stem Marmotina.
Źródło:
Acta Palaeontologica Polonica; 2019, 64, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new basal osmylid neuropteran insect from the Middle Jurassic of China linking Osmylidae to the Permian – Triassic Archeosmylidae
Autorzy:
Makarkin, V.V.
Yang, Q.
Ren, D.
Powiązania:
https://bibliotekanauki.pl/articles/20177.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
A new osmylid neuropteran insect Archaeosmylidia fusca gen. et sp. nov. is described from the Middle Jurassic locality of Daohugou (Inner Mongolia, China). Its forewing venation differs from that of other hitherto known osmylids by a set of plesiomorphic features. This genus is considered here as representing a basal group of Osmylidae. The Permian–Triassic family Archeosmylidae comprises the genera Archeosmylus, Babykamenia, and Lithosmylidia. Archaeosmylidia and Archeosmylidae share the few−branched CuP, the absence of zigzag vein pattern, and the scarcity of the crossveins in the radial space.Weestimate that Osmylidae might have originated in the Triassic from some “archeosmylid−like” ancestor.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cenozoic fossil fishes of the extinct alepisauroid family Polymerichthyidae from the Sakhalin Island, Russia
Autorzy:
NAZARKIN, MIKHAIL V.
Powiązania:
https://bibliotekanauki.pl/articles/945438.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
teleostei
aulopiformes
polymerichthys
morphological analysis
systematics
tertiary
russia
sakhalin
Opis:
Five incomplete skeletons of fishes of the extinct monotypic family Polymerichthyidae (Aulopiformes: Alepisauroidei) from the Paleogene and Neogene of Sakhalin Island, Russia, are identified as Polymerichthys sp., described in detail, and compared with known representatives of the family. The results of this study suggest that polymerichthyids were characterized by a prolonged rostrum, behind which the upper jaw symphysis was placed; by an anal fin without spinules, contrary to what was assumed earlier; and, probably, by sexual dimorphism. Morphological analysis reveals the closest relationships of Polymerichthyidae to be with Recent Alepisauridae, but their taxonomic position is still unresolved. The new material is the second occurrence of articulated skeleton of fishes of this family. The new findings from Sakhalin expand the known geographical distribution of Pacific polymerichthyids by about 12° of latitude, and extend the time interval for this family to as early as the late Oligocene.
Źródło:
Acta Palaeontologica Polonica; 2016, 61, 4; 829-838
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Early-Middle Frasnian cyrtospiriferid brachiopods from the East European Platform
Autorzy:
Sokiran, E V
Powiązania:
https://bibliotekanauki.pl/articles/21097.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Early-Middle Frasnian
Frasnian
cyrtospiriferid brachiopod
brachiopod
East European Platform
paleontology
Russia
Brachiopoda
Cyrtospiriferidae
Opis:
The cyrtospiriferids are among the most important fossils in the Frasnian strata of the East European Platform (EEP). During the Early Frasnian (Palmatolepis falsiovalis Zone) the numerous and morphologically distinct Uchtospiriferinae, accompanied by very scarce Cyrtospiriferinae, are known from South Timan. The mass appearance of cyrtospiriferins on the platform at the beginning of the Middle Frasnian is linked with significant sea−level rise of Devonian Transgression−Regression (T−R) cycle IIc. At that interval these brachiopods attain their highest diversity of the entire Frasnian. The Early Frasnian type species of the genus Uchtospirifer is here revised, and subfamily Uchtospiriferinae re−established. Cyrtospirifer schelonicus, C. rudkinensis, C. mylaensis sp. nov., and C. tenticulum are described from the Middle Frasnian of NW and central regions of EEP and Middle Timan.
Źródło:
Acta Palaeontologica Polonica; 2006, 51, 4; 759-772
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new species of Todites [Pteridophyta] with in situ spores from the Upper Permian of Pechora Cis-Urals [Russia]
Autorzy:
Naugolnykh, S V
Powiązania:
https://bibliotekanauki.pl/articles/22721.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Pteridophyta
in situ
Todites
Osmundaceae
Upper Permian
Todites lobulatus
fossil
Permian
Russia
new species
Intinskian Formation
spore
Ural Mountains
paleontology
fern
Opis:
Todites lobulatus sp.nov.is described from the lowermost Upper Permian (Ufimian) of the Pechora basin.The fossil remains preserved as compressions and impressions, were collected from near−shore lake deposits of the Intinskian Formation.The species belongs to protoleptosporangiate ferns (Pteridophyta) of the Osmundaceae, and is characterized by tripinnate fertile fronds with deeply dissected lobate pinnules with round apexes.Sporangia are round or ovoid, free, and located on the abaxial leaf surface.A group of specialized thick−walled cells is located on the top or side part of the sporangia.The species is the most ancient representative of Osmundaceae. Spores of Osmundacidites−type, preserved in situ, are characterized.
Źródło:
Acta Palaeontologica Polonica; 2002, 47, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frasnian-Famennian extinction and recovery of rhynchonellid brachiopods from the East European Platform
Autorzy:
Sokiran, E V
Powiązania:
https://bibliotekanauki.pl/articles/23210.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
rhynchonellid dynamics
sea-level change
Brachiopoda
Rhynchonellida
Famennian
stratigraphy
Frasnian
rhynchonellid brachiopod
brachiopod
East European Platform
recovery
regional history
terminology
extinction
paleontology
Opis:
In contrast to dramatic losses of the Atrypida and Pentamerida at the Frasnian–Famennian boundary, the Rhynchonellida demonstrated relatively high rate of survival, and recolonized vacated benthic ecospace after the F–F extinction events. The Late Devonian evolution of rhynchonellid faunas from the East European Platform shows three distinctive periods of their mass appearance. High abundance of rhynchonellids is characteristic for early–middle Frasnian (Palmatolepis transitans–Pa. punctata zones) and early Famennian (Pa. crepida Zone). Invasion of taxonomically diverse and rich rhynchonellid faunas usually corresponds to the major transgressive episodes, whereas decline coincides with regressive conditions of the basin. Rhynchonellid assemblages were replaced in the late Frasnian (Late Pa. hassi–Pa. linguiformis zones) by theodossiid− and cyrtospiriferid−dominated assemblages, which occupied habitats in newly expanding marine environments. The extinction of theodossiids at the end of the Frasnian and the next transgressive episode possibly stimulated an expansion of rhynchonellids. The early Frasnian species Ripidiorhynchus livonicus (Buch, 1834), and the early Famennian R. huotinus (Verneuil, 1845) and R. griasicus (Nalivkin, 1934) are revised. Early Famennian species Paromoeopygma koscharica (Nalivkin, 1934) from the central region is redescribed. Ripidiorhynchus chencinensis sp. nov. from the latest Givetian of Poland, as well as Globulirhynchia minima sp. nov. from the late Frasnian of the central region of the Russia, are described.
Źródło:
Acta Palaeontologica Polonica; 2002, 47, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 107

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