Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "middle Miocene" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-15 z 15
    Tytuł:
    New data on Paenelimnoecus from the Middle Miocene of Spain support the shrew subfamily Allosoricinae
    Autorzy:
    Van, den Hoek Ostende L W
    Furio, M.
    Garcia-Paredes, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/21355.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Limnoecus truyolsi
    Miocene
    shrew
    Spain
    paleontology
    Paenelimnoecus
    Allosoricinae
    Middle Miocene
    Opis:
    Limnoecus truyolsi was long considered an enigmatic shrew. Additional material from the Calatayud−Montalbán Basin (Spain) shows it to be referable to the genus Paenelimnoecus. The species represents an intermediate form between P. micromorphus and P. crouzeli. This lineage confirms the separate development of the “soricine” p4, and thus supports the Allosoricinae as a separate subfamily.
    Źródło:
    Acta Palaeontologica Polonica; 2009, 54, 1; 159-164
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The brachiopod Lingula in the Middle Miocene of the Central Paratethys
    Autorzy:
    Emig, C C
    Bitner, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/20475.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Lingula dregeri
    Miocene
    brachiopod
    Middle Miocene
    deposit
    Lingula dumortieri
    paleontology
    Lingula
    Opis:
    In the Middle Miocene deposits of the Central Paratethys, lingulides, because of their low taphonomic potential, are very rare and difficult to identify. Two species of Lingula, L. dumortieri Nyst, 1843 and L. dregeri Andreae, 1893, have been recorded from the Badenian (Middle Miocene) of Poland. Re−examination of the specimens has shown that none of them can be referred to Lingula dumortieri (now Glottidia dumortieri). The rounded outline of the scar of the posterior adductor muscle and the lack of the septa indicate that all the specimens must be referred to the genus Lingula. Their valves appear to be slightly more convex than in other species of Lingula and closely resemble the Recent L. tumidula Reeve, 1841. We assign all the specimens of Lingula found in the Miocene of Poland to L. dregeri. Because our specimens are juveniles and some are broken we cannot adequately redescribe this species. Lingula dregeri was distributed in the Middle Miocene of the Central Paratethys (Austria, Poland, Ukraine, Romania), while Glottidia dumortieri occurs in the Pliocene of Northern Europe (Atlantic Province).
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Habitat preferences of European Middle Miocene omnivorous ursids
    Autorzy:
    Viranta, S
    Powiązania:
    https://bibliotekanauki.pl/articles/22820.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Indarctos
    Miocene
    fossil
    Middle Miocene
    habitat preference
    omnivorous ursid
    ursid
    Europe
    paleontology
    Opis:
    Indarctos spp. were the first large−bodied bears with omnivorous tendencies. Two Indarctos fossils assigned to I. arctoides ssp. by Bernor, Feibel, et al. (2003) and Viranta and Werdelin (2003) show that the genus had a wide geographic range in Europe in the Middle Miocene and was represented by at least two contemporaneous species. Present work shows that the two species of Indarctos lived in a mixture of environments, and were not clearly separated into distinct habitats. Indarctos seems to have evolved during an interval of faunal turnover in Europe. The appearance of Indarctos coincided with an extinction of small omnivorous mammals and was accompanied by the appearance of other large omnivores.
    Źródło:
    Acta Palaeontologica Polonica; 2004, 49, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Planktonic foraminiferal response to Middle Miocene cooling in the Southern Ocean [ODP Site 747, Kerguelen Plateau]
    Autorzy:
    Majewski, W
    Powiązania:
    https://bibliotekanauki.pl/articles/21967.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    plankton
    Foraminifera
    response
    Middle Miocene
    Southern Ocean
    Kerguelen Plateau
    climate change
    Miocene
    paleontology
    Opis:
    The response of planktonic foraminifera to changing oceanographic conditions during Middle Miocene Climate Transition (MMCT) ~14 million years ago (Ma) at ODP Site 747 (Kergeulen Plateau) is investigated. Faunal changes are presented in the background of sea surface temperature (SST) estimates and multi−taxon δ18O and δ13C data presented in other studies. Four faunal transitions are distinguished between 15.0 and 12.2 Ma. The first two affected only a limited number of taxa, and do not lead to large−scale assemblage reorganizations. They are only minor assemblage changes within the pre−MMCT fauna. The first (14.5–14.4 Ma) is marked by a reduction in the Globorotalia zealandica plexus in favor of the Globorotalia praescitula plexus, coupled with the first signs of increased seasonality. The second (14.3–14.2 Ma) is characterized by recovery and diversification of the G. zealandica plexus and an increase in Turborotalita quinqueloba in response to further enhanced seasonality. The third faunal transition across the Middle Miocene Shift (MMS) in 18O (13.9–13.8 Ma) affects almost all planktonic foraminifera, leading to dismembering of the pre−MMCT assemblage. These changes were triggered by the SST drop by ~7C, followed by reduced sea−surface salinity following the MMS, which favored the opportunistic Neogloboquadrina continuosa. Its dominance spans the transitional period (13.8–13.2 Ma), during which several planktonic foraminiferal events gradually shaped the post−MMCT assemblage. The fourth faunal threshold took place during the hiatus in the ODP Hole 747A record spanning 13.2–12.5 Ma. It is expressed by the establishment of an assemblage dominated by Globorotalia praescitula and Globigerina bulloides in association with diminishing of the low−salinity surface layer. The two dominant taxa exhibit well−defined morphologies, much different from their earlier relatives. The microperforate foraminifera show relatively few morphological changes, probably due to their morphological conservatism. Their changes are thought to herald the large foraminiferal transformations, especially in case of the third and fourth faunal transition thresholds.
    Źródło:
    Acta Palaeontologica Polonica; 2010, 55, 3; 541-560
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
    Autorzy:
    Kamikuri, S.-I.
    Motoyama, I.
    Nishi, H.
    Iwai, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/21655.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Neogene
    Radiolaria
    biostratigraphy
    fauna
    evolution rate
    Pacific Ocean
    Late Miocene
    Miocene
    Middle Miocene
    paleontology
    microfossil
    Opis:
    Radiolarians from Sites 845 and 1241 in the eastern equatorial Pacific were examined in order to evaluate the role of paleoceanographic perturbations upon the general faunal evolutionary pattern of tropical planktonic organisms during the last 17 Ma. Radiolarian appearance and extinction rates indicate no periods of mass extinctions during the past 17 Ma. However, a relatively rapid replacement of the species in the radiolarian assemblages occurs near the middle–late Miocene boundary. This replacement event represents the gradual extinction of a number of radiolarian species and their gradual replacement by evolving new species. The modern equatorial circulation system was formed near the middle–late Miocene boundary due to the closure of the Indonesian seaway. The minor faunal turnover appears to be associated with the formation of the modern equatorial circulation system near the middle–late Miocene boundary. Diatom assemblages in the equatorial Pacific became more provincial in character after about 9 Ma. The appearance and extinction rates of planktic foraminifers were relatively high near the middle–late Miocene boundary, and those of calcareous nannoplankton reached high values in the early late Miocene in the equatorial Pacific Ocean. Thus, faunal evolution from the middle Miocene type to late Miocene types occurred first, being followed by floral evolution. The middle–late Miocene boundary is not a sharp boundary for planktonic microfossils, but marks a time of transition critical for faunal and floral evolution in both siliceous and calcareous microfossil assemblages in the equatorial Pacific Ocean.
    Źródło:
    Acta Palaeontologica Polonica; 2009, 54, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Middle Miocene rodents from Pasalar, Anatolia, Turkey
    Autorzy:
    Pelaez-Campomanes, P
    Daams, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/20448.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Miocene
    mammal
    Turkey
    Rodentia
    Spermophilinus
    Anatolia
    rodent
    Megacricetodon
    Middle Miocene
    biochronology
    Democricetodon
    Peridyromys
    paleontology
    Opis:
    Despite the importance of the Paşalar fauna for the evolution and biogeography of Miocene mammals, few studies on its rodents have been published. In this paper a taxonomic analysis of the Paşalar rodents and the possible correlation that can be based on them are presented. Several rodent taxa, previously unknown from Paşalar are described. These include the cricetids Megacricetodon andrewsi sp. nov. and Democricetodon brevis (Schaub, 1925), the sciurids Spermophilinus bredai (Meyer, 1848) and Sciurinae indet., and the glirid Peridyromys lavocati sp. nov. The taxa previously described from Paşalar are: the ctenodactylid Sayimys cf. intermedius (Sen and Thomas, 1979), the cricetid Cricetodon pasalarensis (Tobien, 1978), the spalacid Pliospalax marmarensis Ünay, 1990 and the castorid cf. Chalicomys jaegeri Kaup, 1832. These determinations represent a reduction of the number of taxa recorded from the locality, as previous papers listed up to five sciurids. Only two sciurids and two glirids are recognized in this study. Mainly on the basis of the new cricetid records, it is possible to correlate the Paşalar fauna to late MN6.
    Źródło:
    Acta Palaeontologica Polonica; 2002, 47, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Traces of cassid snails predation upon the echinoids from the Middle Miocene of Poland: Comments on Ceranka and Zlotnik [2003]
    Autorzy:
    Donovan, S K
    Pickerill, R.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/23250.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    gastropod
    cassid snail
    fossil
    Polska
    Middle Miocene
    echinoid
    snail
    Echinocyamus linearis
    paleontology
    Opis:
    Small round holes in the tests of fossil echinoids present problems of interpretation, the most obvious questions being who did it and why? Both have been the cause of considerable conjecture by ichnologists and echinoderm palaeontologists. “Drill holes” described from the Miocene of Poland in the echinoid Echinocyamus linearis Capeder are classified within the ichnospecies Oichnus simplex Bromley. Contrary to the original analysis, the possibility remains that some of these holes were the result of eulimid parasitism rather than predation by juvenile cassids. If other, larger echinoids in the fauna suffered predation by adult cassids, then the available samples are probably too small for it to be recognised.
    Źródło:
    Acta Palaeontologica Polonica; 2004, 49, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Traces of cassid snails predation upon the echinoids from the Middle Miocene of Poland
    Autorzy:
    Ceranka, T
    Zlotnik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/21308.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    gastropod
    Miocene
    Polska
    Cassidae
    morphology
    identification
    predation
    fossil echinoid
    Middle Miocene
    echinoid
    population structure
    snail
    paleontology
    Opis:
    Drill holes on tests of Echinocyamus linearis from the Middle Miocene Korytnica Basin represent the first well documented fossil record of cassid predation from Poland. These traces complement the ecological information on the size and structure of cassid populations recorded by body fossils. The high number of drill holes recognised from the Heterostegina Sands, the uppermost part of the Korytnica depositional sequence, indicates the occurrence of a large cassid population during the late stage of development of the Korytnica Basin. The small size of most of the drill holes indicates that juvenile gastropods of the family Cassidae, which are not preserved in the fossil record of the investigated area, were also present in the cassid populations.
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Patterns of drilling predation of cassid gastropods preying on echinoids from the Middle Miocene of Poland
    Autorzy:
    Zlotnik, M
    Ceranka, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/22346.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    gastropod
    Miocene
    drilling predation
    drill hole
    cassid gastropod
    Polska
    Cassidae
    Middle Miocene
    echinoid
    predatory behaviour
    paleontology
    Opis:
    Test−drilling predation by cassid gastropods on minute clypeasteroid echinoids has been studied in the fossil assemblage of the Heterostegina Sands (middle Miocene, Holy Cross Mountains, Poland). The analysed prey, collected from two sublithofacies of the Heterostegina Sands (coarse−grained Heterostegina Sands and fine−grained Heterostegina Sands), represent three species of Echinocyamus (E. linearis, E. pusillus and E. pseudopusillus). The drill holes were produced presumably by one cassid species, Semicassis miolaevigata. The investigation showed that drilling predation intensities varied among the prey species. Within both fine− and coarse−grained sands, E. linearis was drilled more frequently than E. pusillus. An intermediate value of drilling predation was recognised for E. pseudopusillus. The intensities of drilling predation recognised for some of the prey species (E. pusillus) varied also between (but never within) the sublithofacies. Drilling predation was both size− and site−selective. Larger individuals of E. linearis and E. pusillus were attacked more frequently and the aboral side of the test of all Echinocyamus species was drilled preferentially. An extremely high concentration of drill holes was observed in the apical disc and petals. Results obtained for the most abundant prey (E. linearis) indicate that the predatory behaviour of large cassids was somewhat different from those typical of small cassids. Large cassids drilled and consumed their prey almost always individually, whereas small cassids sometimes preyed upon the urchins in a group. Large cassids displayed also a higher site−selectivity. They more frequently drilled in the petals and apical disc. The patterns of drilling predation were most likely controlled by the potential energetic value of prey (measured by the internal volume/test thickness ratio), prey and predator mobility, prey mode of life, thickness and porosity of the prey's tests, as well as by the proportions between the size of the prey and size of the predator. The results suggest that the mode of life of the prey and its test structure can influence the drill hole morphology.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cranial morphology, systematics and succession of beavers from the middle Miocene Valentine Formation of Nebraska, USA
    Autorzy:
    Korth, W W
    Powiązania:
    https://bibliotekanauki.pl/articles/21878.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Miocene
    beaver
    systematics
    Valentine Formation
    paleontology
    fauna succession
    cranial morphology
    USA
    Castoridae
    Barstovian
    Clarendonian
    Middle Miocene
    Nebraska
    Opis:
    Previously, it was believed that there was a dramatic turn−over in the fauna of beavers (Rodentia, Castoridae) from the Barstovian to the Clarendonian from Nebraska. Stratigraphically controlled collections of fossil castorids from the Valentine Formation, which cross this boundary, now indicate that a complete change in the castorid fauna did not occur, but instead a more gradual change and replacement of earlier taxa with more advanced taxa occurred. The range of Eucastor tortus and Monosaulax skinneri is extended from late Barstovian into the latest Barstovian Devil’s Gulch Member and the range of the otherwise Clarendonian species of Prodipoides is extended downward into the late Barstovian Crookston Bridge Member. The skulls of Monosaulax skinneri and Eucastor valentinensis are described in detail for the first time. The cranial morphology of M. skinneri is primitive for Castoroidini and that of E. valentinensis is specialized for tooth−digging behavior as in the Nothodipoidini. A new genus, Temperocastor, is proposed for E. valentinensis based on its primitive morphology of the cheek teeth and derived cranial morphology. Temperocastor represents the most primitive nothodipoidine.
    Źródło:
    Acta Palaeontologica Polonica; 2008, 53, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The gomphotheriid mammal Platybelodon from the Middle Miocene of Linxia Basin, Gansu, China
    Autorzy:
    Wang, S.
    He, W.
    Chen, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/21626.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    gomphotheriid mammal
    mammal
    Platybelodon
    Mammalia
    Gomphotheriidae
    morphology
    cladistics
    Middle Miocene
    Miocene
    Linxia Basin
    Gansu province
    China
    paleontology
    Opis:
    In this paper, we report on abundant fossils of Platybelodon from the Middle Miocene of the Linxia Basin, China. Most of the fossils were discovered at two localities (Laogou and Zengjia) in the upper Middle Miocene Hujialiang Formation, and possess derived characters for the genus, including a relatively slender upper incisor, the development of a transverse ledge on the narrowest part of the mandibular symphysis, narrow, elongate and hypsodont third molars, the development of fourth loph(id)s on the second molars, and the development of small enamel conules and cementum in the interloph(id)s. Following comparisons with other Eurasian platybelodonts, we assign these remains to Platybelodon grangeri, and demonstrate that they are morphologically intermediate between P. grangeri from the Tunggurian localities of Tarim Nor and Platybelodon Quarry in Inner Mongolia. We suggest that the locality of Laogou may be younger than that of Zengjia, based on the occurrence of platybelodonts showing a suite of more derived characters. In addition, we assign two further specimens of Platybelodon from the lower Middle Miocene Dongxiang Formation of the Linxia Basin to Platybelodon danovi, owing to their retention of plesiomorphic characters distinguishing them from other Linxia Platybelodon fossils. Based on a cladistic analysis, we propose an evolutionary sequence of platybelodonts in Eurasia, and discuss potential functional adaptations.
    Źródło:
    Acta Palaeontologica Polonica; 2013, 58, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new kentriodontine dolphin from the middle Miocene of Portugal
    Autorzy:
    Lambert, O
    Estevens, M.
    Smith, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/22701.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Portugal
    Miocene
    Odontoceti
    Middle Miocene
    Lower Tagus Basin
    Kentriodontidae
    new species
    dolphin
    Cetacea
    new genus
    Tagicetus joneti
    paleontology
    Opis:
    A nearly complete skull, a partial left scapula, five lumbar vertebrae, and some fragments of ribs of a medium−sized kentriodontid dolphin (Cetacea, Odontoceti) discovered in the middle Miocene of Setúbal Peninsula, Lower Tagus Basin, Portugal, are herein assigned to a new genus and species, Tagicetus joneti. Within the grade−level family Kentriodontidae, the new taxon is referred to the specifically and ecologically diversified subfamily Kentriodontinae, essentially defined by a well−developed posterolateral projection of the nasal. The elongated rostrum, the constriction of the asymmetric premaxillae at the base of the rostrum, the anteriorly elongated palatines, and the elevated vertex of T. joneti suggest closer affinities with the larger, more derived Macrokentriodon morani, from the middle Miocene of Maryland (USA). Among other features, T. joneti differs from the latter in having more numerous maxillary teeth and shorter zygomatic processes of the squamosals. Besides providing additional indications about the evolutionary trends within the Kentriodontinae, this occurrence constitutes the first record of the subfamily from the east coast of the North Atlantic based on a nearly complete skull. Considering their morphological diversity and wide geographic range, the Kentriodontinae may have constituted one of the dominant groups of Miocene oceanic dolphins.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Moles [Talpidae] from the late Middle Miocene of South Germany
    Autorzy:
    Ziegler, R
    Powiązania:
    https://bibliotekanauki.pl/articles/21675.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Myxomygale gracilis
    Leptoscaptor robustior
    Middle Miocene
    Mammalia
    Leptoscaptor bavaricum
    Talpidae
    Germany
    mole
    Tenuibrachiatum storchi
    paleontology
    Opis:
    The moles from the South German fissure fillings Petersbuch 6, 10, 18, 31, 35, 48 include 14 species, four of which are new: Leptoscaptor bavaricum gen. et sp. nov., Leptoscaptor robustior gen. et sp. nov., Myxomygale gracilis sp. nov. and Tenuibrachiatum storchi gen. et sp. nov. Most samples are characterised by their high species diversity. Talpa minuta is the most common species in nearly all samples. Leptoscaptor is characterised by a slender humerus and by the loss of lower antemolars. It is interpreted as a Miocene offshoot of the Scalopini. Myxomygale gracilis represents the latest record of the genus. Tenuibrachiatum storchi has a slender humerus and one lower incisor is lost. The species is structurally ancestral to the extant Urotrichus. The genus Pseudoparatalpa Lopatin, 1999 is considered a synonym of Paratalpa. The talpids of the Petersbuch fissures are in line with a Middle Miocene correlation of MN 7+8 as already indicated by the cricetids. The remains of desmans in the Petersbuch 6 fissure filling indicate the proximity of water. The presence of Urotrichini in nearly all samples, albeit scanty, suggests a forestal environment within the range of the owls, which preyed on them.
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Size-related changes in predatory behaviour of naticid gastropods from the Middle Miocene Korytnica Clays, Poland
    Autorzy:
    Zlotnik, M
    Powiązania:
    https://bibliotekanauki.pl/articles/22130.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Natica tigrina
    gastropod
    Miocene
    drill hole
    shell
    Polska
    Naticidae
    predatory behaviour
    bivalve
    Corbula gibba
    predation
    Middle Miocene
    mollusc
    Hinia restitutiana
    Corbulidae
    Holy Cross Mountains
    paleontology
    paleozoology
    Opis:
    The analysis of shell-drilling predation by naticid gastropods on molluscs from the Korytnica Clays (Middle Miocene, Holy Cross Mountains, Central Poland) has focused on the bivalve Corbula gibba and gastropods Natica tigrina and Hinia restitutiana. The results indicate that predatory behaviour of naticids varies depending on the size of the predator. When drilling corbulids, large naticids displayed higher site-selectivity than smaller naticids. Also, large naticids drilled energetically attractive prey (Hinia restitutiana and Natica tigrina) more frequently than small naticids. Preferential drilling displayed by large naticids from the Korytnica Clays increases the net energy gain for the predator and in result allows it to drill more effectively.
    Przedstawiono analizę rozkładu drążeń Naticidae na muszlach małża Corbula gibba (Olivi, 1792) oraz ślimaków klinia restitutiana (Fontannes, 1879) i Natica tigrina Röding, 1789 pochodzących ze środkowomioceńskich iłów korytnickich. Wykazano, że drapieżnicze zachowania Naticidae były uzależnione od wielkości drapieżcy. Duże Naticidae drążyły głównie w środkowobrzusznym obszarze prawej skorupki C. gibba. Drążenia małych naticidów są zaś na tej skorupce rozmieszczone mniej lub bardziej przypadkowo (patrz Fig. 1A, C oraz porównaj fqLC z fqsc w Tabeli l ). Ponadto, małe Naticidae drążyły na skorupce lewej częściej niż duże (patrz Fig. I A—D oraz porównaj fqLL z fqsL w Tabeli 1). Wielkość drapieżcy miała również wpływ na wybór gatunku ofiary. Duże Naticidae znacznie częściej niż małe atakowały H. restitutiana i N. tigrina (Fig. 2A, B), natomiast małe Naticidae częściej niż duże atakowały C. gibba (patrz Fig. 1A—D oraz porównaj sumę NLR i NLL z NSR i NSL w Tabeli l). Wydaje się, że sposób umiejscawiania drążenia oraz wybór gatunku ofiary dokonywany przez duże ślimaki z iłów korytnickich mogły znacząco wpływać na zwiększenie efektywności polowania — prawa skorupka C. gibba jest bowiem w rejonie środkowobrzusznym najcieńsza. Drapieżnik atakujący ten obszar muszli potrzebował więc mniej czasu na jej przewiercenie. H. restitutiana i N. tigrina stanowiły zaś, ze względu na swoje rozmiary i budowę anatomiczną (duża mięsista noga), potencjalnie obfitsze źródło pożywienia niż C. gibba.
    Źródło:
    Acta Palaeontologica Polonica; 2001, 46, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cambrian microfossils from glacial erratics of King George Island, Antarctica
    Autorzy:
    Wrona, R
    Powiązania:
    https://bibliotekanauki.pl/articles/22565.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    skeletal fossil
    Antarctic
    Australia
    Middle Cambrian
    Early Cambrian
    microfossil
    Cape Melville Formation
    Cambrian
    paleontology
    Early Miocene
    King George Island
    Opis:
    Limestone erratics in the Early Miocene glacio−marine Cape Melville Formation of King George Island, West Antarctica, have yielded Early and Middle Cambrian small skeletal fossils (SSF) accompanied by calcified cyanobacteria, archaeocyath and spiculate sponges, trilobites and echinoderms. The SSF assemblage comprises disarticulated sclerites of chancelloriids, halkieriids, tommotiids, lapworthellids, palaeoscolecids, hyolithelminths, lingulate brachiopods, helcionelloid molluscs, hyoliths, and bradoriids. All 24 described species are common to Antarctica and Australia. Most are recorded here from Antarctica for the first time, including Shetlandia multiplicata gen. et sp. nov. and two new species Byronia? bifida and Hadimopanella staurata. The lithological and fossil contents of the boulders are almost identical with autochthonous assemblages from the Shackleton Limestone in the Argentina Range and Transantarctic Mountains. Cambrian outcrops around the Weddell Sea are a plausible source of the erratics. The fauna is closely similar to that from the uppermost Botomian Wilkawillina Limestone in the Flinders Ranges and Parara Limestone on Yorke Peninsula, and Toyonian Wirrealpa and Aroona Creek Limestones in the Flinders Ranges, as well as the Ramsay Limestone on Yorke Peninsula, all in the Arrowie and Stansbury Basins of South Australia. These very similar faunal and facies successions for Antarctica and Australia strongly support their common biotic and sedimentary evolution on the same margin of a greater Gondwana supercontinent throughout the Early Cambrian.
    Źródło:
    Acta Palaeontologica Polonica; 2004, 49, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies