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Wyświetlanie 1-15 z 36
Tytuł:
New molluscs associated with biogenic substrates in Cenozoic deep-water sediments of Washington State
Autorzy:
Kiel, S
Goedert, J.L.
Powiązania:
https://bibliotekanauki.pl/articles/21866.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
deep sea
Eocene
deep water sediment
sediment
Cenozoic
new bivalve species
Gastropoda
Bivalvia
mollusc
Washington State
biogenic substrate
Oligocene
paleontology
Opis:
Cenozoic deep−water sediments of the Lincoln Creek, Makah, and Pysht formations in western Washington State, USA, contain sunken driftwood and whale bones that were colonized by invertebrates which largely depend on this type of transient habitat. These fossil woodand whale−fall faunules yielded six new mollusk species that appear to have been endemic to these biogenic microhabitats, except for one species which also occurs in cold−seep limestones. The new gastropod species are the neomphalid Leptogyra squiresi, the buccinid Colus sekiuensis, the allogastropod Xylodiscula okutanii, and the new bivalve species are the protobranch “Nuculana” posterolaevia, the mytilid Idas? olympicus, and the heterodont Thyasira xylodia.
Źródło:
Acta Palaeontologica Polonica; 2007, 52, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new genus of chemosymbiotic vesicomyid bivalves from the Oligocene of western North America
Autorzy:
Hybertsen, F.
Goedert, J.L.
Kiel, S.
Powiązania:
https://bibliotekanauki.pl/articles/31341392.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
new genus
bivalve
Bivalvia
Vesicomyidae
Oligocene
North America
cold-seep deposit
deep-water formation
Źródło:
Acta Palaeontologica Polonica; 2022, 67, 3; 703-709
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Braincase anatomy of the titanosaurian sauropod Lirainosaurus astibiae from the Late Cretaceous of the Iberian Peninsula
Autorzy:
Diez Diaz, V.
Pereda Suberbiola, X.
Sanz, J.L.
Powiązania:
https://bibliotekanauki.pl/articles/22340.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
braincase zob.neurocranium
neurocranium
anatomy
titanosaurian sauropod
Lirainosaurus astibiae
Late Cretaceous
Cretaceous
Iberian Peninsula
paleontology
Sauropoda
Titanosauria
Lirainosaurus
Europe
sauropod
Opis:
Lirainosaurus is the only titanosaurian sauropod described to date from the Late Cretaceous of the Iberian Peninsula. The type of Lirainosaurus astibiae consists of both cranial and postcranial remains that were found as disarticulated elements in the Laño quarry (Treviño, northern Spain). This taxon was diagnosed originally on the basis of vertebral and appendicular autapomorphic traits. The study of a paratypic skull fragment and a second referred specimen provides information about its braincase morphology. Lirainosaurus is regarded as a derived titanosaur on the basis of the complete fusion between the prootic and the exoccipital−opisthotic complex, the position of the cranial foramina, and the shape and orientation of the occipital condyle. The braincase of L. astibiae appears to be diagnostic in the presence of a foramen distally on each basal tubera. The absence of median subcondylar foramina in the basioccipital may be an autopomorphic trait or be due to ontogenetic growth. A comparison with other partial skulls known in Europe suggests a high diversity during the Campanian/Maastrichtian, with at least three different titanosaurian species living in the Ibero−Armorican Island.
Źródło:
Acta Palaeontologica Polonica; 2011, 56, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Climate and changes in mammal diversity during the late Pleistocene-Holocene in the Pampean Region [Argentina]
Autorzy:
Prado, J L
Alberdi, M T
Azanza, B
Sanchez, B
Powiązania:
https://bibliotekanauki.pl/articles/20763.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Argentina
Holocene
mammal diversity
mammal
diversity
change
extinction
Pleistocene
climate
paleontology
climate change
Opis:
The association of changes in mammal diversity with periods of global climatic change is suggestive of a causal relationship. Two important features in the testing of this climatic model are as follows: the timing and the pattern of the diversity changes, and the particular climatic variables examined, since different patterns of evolutionary interactions would be expected depending on different climatic variables. In order to analyse the relationship between climate change and faunal events, we need to establish a set of comparable data. To provide a finely resolved picture of both climatic and faunal events, the last 32,500-years were divided into 13 chronological units of 2,500-years each. The limit of 32,500-years was imposed by the availability of good localities with radioisotopic calibration. Climatic stability was measured in these analyses in terms of cycles per unit of time, the amount of variation in temperature per unit of time, and the magnitude of change between modal temperature of one interval less modal temperature from preceding interval. The data presented here suggest that the primary effect of climatic change is on: (1) levels of extinction (or migration) of large mammals; and (2) diversity and origination (or immigration) of small mammals.
Źródło:
Acta Palaeontologica Polonica; 2001, 46, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New artiodactyl ruminant mammal from the Late Oligocene of Pakistan
Autorzy:
Metais, G
Antoine, P.O.
Marivaux, L.
Welcomme, J.L.
Ducrocq, S.
Powiązania:
https://bibliotekanauki.pl/articles/20876.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Ruminantia
ruminant
Palaeohypsodontus zinensis
mammal
Bovidae
Mammalia
artiodactyl ruminant
Oligocene
Pakistan
Late Oligocene
paleontology
Opis:
Dental and postcranial material of the bovid−like ruminant Palaeohypsodontus zinensis sp. nov. is reported from the Oligocene of the Bugti Hills (Balochistan, Pakistan). This finding extends the geographic distribution of this dentally highly derived ruminant, which was previously restricted to the early Oligocene of Mongolia and China. The inclusion of Palaeohypsodontus within the Bovidae is disputed on the basis of astragalus characters, and the taxonomic status of the Oligo−Miocene Eurasian bovid−like ruminants is briefly discussed. It is concluded that the assignment of Palaeohypsodontus to the Bovidae would be premature. More dental and postcranial material of this genus as well as additional fossils of early bovids are necessary to shed new light on the phylogenetic relationships within the first representatives of that family in Eurasia.
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A herpetotheriid marsupial from the Oligocene of Bugti Hills, Balochistan, Pakistan
Autorzy:
Crochet, J Y
Antoine, P.O.
Benammi, M.
Iqbal, N.
Marivaux, L.
Metais, G.
Welcomme, J.L.
Powiązania:
https://bibliotekanauki.pl/articles/22725.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Bugti Hills
classification
herpetotheriid marsupial
Balochistan
Chitarwata Formation
Pakistan
Oligocene
fossil vertebrate
Asia
Asiadidelphis akbarbugtii
paleontology
Opis:
Didelphimorph marsupials were widely distributed in Asia during the Cenozoic, but their occurrence in the Indian subcontinent has not so far been demonstrated. Here, we describe a new herpetotheriid marsupial Asiadidelphis akbarbugtiisp. nov. from the early Oligocene Bugti Member of the Chitarwata Formation, Bugti Hills, Pakistan. The discovery of the herpetotheriids in the Oligocene of Pakistan represents the most southern occurrence of the family, which was thought to have occurred only to the north of the Alpine−Himalayan Suture. Our data suggest that episodic faunal exchanges occurred between the Asian mainland and the Indian subcontinent during the late Paleogene, and that the southern Asian faunas were not as completely isolated by the Himalayan chain as formerly believed.
Źródło:
Acta Palaeontologica Polonica; 2007, 52, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A partial skeleton of an enantiornithine bird from the Early Cretaceous of Northwestern China
Autorzy:
Lamanna, M.C.
You, H.-L.
Harris, J.D.
Chiappe, L.M.
Ji, S.-A.
Lu, J.-C.
Ji, Q.
Powiązania:
https://bibliotekanauki.pl/articles/20670.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
China
Cretaceous
Early Cretaceous
paleontology
skeleton
partial skeleton
bird
Aves
enantiornithine bird
Enantiornithes
Xiagou Formation
remains
Opis:
Although recent discoveries from Lower Cretaceous sediments in northeastern China have greatly improved our understanding of the initial stages of avian diversification in eastern Asia, the early evolution of Aves elsewhere on the continent remains poorly understood. In 2004, a collaborative field effort directed by personnel from the Chinese Academy of Geological Sciences and Carnegie Museum of Natural History recovered multiple partial to nearly complete avian skeletons from outcrops of the Lower Cretaceous Xiagou Formation exposed in the Changma Basin of northwestern Gansu Province, China. Here we describe a thrush−sized partial skeleton comprised of a fragmentary pelvic girdle and largely complete hind limbs. A phylogenetic analysis of 20 avian ingroup taxa and 169 anatomical characters places the specimen in Enantiornithes, and within that clade, in Euenantiornithes. When coupled with additional recent discoveries from the Changma Basin, the new skeleton improves our understanding of early avian evolution and diversification in central Asia.
Źródło:
Acta Palaeontologica Polonica; 2006, 51, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A second Cretaceous ornithuromorph bird from the Changma Basin, Gansu Province, northwestern China
Autorzy:
You, H.-L.
Atterholt, J.
O'Connor, J.K.
Harris, J.D.
Lamanna, M.C.
Li, D.-Q.
Powiązania:
https://bibliotekanauki.pl/articles/22506.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Cretaceous
ornithuromorph bird
bird
Aves
Ornithuromorpha
Aptian
Early Cretaceous
paleontology
Changma basin
Gansu province
China
Opis:
Finely−bedded lacustrine deposits of the Aptian (Lower Cretaceous) Xiagou Formation exposed in the Changma Basin of Gansu Province, northwestern China, have yielded numerous fossil vertebrate remains, including approximately 100 avian specimens. Though the majority of these birds appear referable to the ornithuromorph Gansus yumenensis, a number of enantiornithine fossils have also been recovered. Here we report on a specimen consisting of a complete, three−dimensionally preserved sternum, furcula, and sternal ribs that represents a second ornithuromorph taxon from the Xiagou Formation at Changma. The fossil exhibits morphologies that distinguish it from all previously−known Xiagou birds and demonstrate that it represents a derived non−ornithurine member of Ornithuromorpha. Though it is morphologically distinct from the equivalent elements of all other described ornithuromorphs, the material is too incomplete to justify the erection of a new taxon. Nonetheless, it increases the taxonomic diversity of the Xiagou avifauna, thereby expanding our knowledge of Early Cretaceous avian diversity and evolution.
Źródło:
Acta Palaeontologica Polonica; 2010, 55, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nycteroleter affinities of a Permian parareptile from the South African Karoo Basin
Autorzy:
Cisneros, J C
Tsuji, L.A.
Powiązania:
https://bibliotekanauki.pl/articles/23121.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Karoo Basin
paleontology
Permian
parareptile
Tapinocephalus
South Africa
Middle Permian
Opis:
The Middle Permian Tapinocephalus Assemblage Zone in South Africa has produced a rich record of tetrapods dominated by dinocephalian therapsids and pareiasaurid parareptiles. In this study we reassess the affinities of a specimen from this horizon previously identified as a procolophonoid and provide evidence that it is instead referable to a nycteroleter parareptile, an identification that is more compatible with the age of this fossil. Accordingly, this specimen represents the first record of a nycteroleter in Gondwana.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 1; 165-169
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An ankylosaurid dinosaur from Mongolia with in situ armour and keratinous scale impressions
Autorzy:
Arbour, V.M.
Lech-Hernes, N.L.
Guldberg, T.E.
Hurum, J.H.
Currie, P.J.
Powiązania:
https://bibliotekanauki.pl/articles/21760.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
ankylosaurian dinosaur
dinosaur
Mongolia
Dinosauria
Ankylosauria
Ankylosauridae
Tarchia
Saichania
Late Cretaceous
Cretaceous
paleontology
Opis:
A Mongolian ankylosaurid specimen identified as Tarchia gigantea is an articulated skeleton including dorsal ribs, the sacrum, a nearly complete caudal series, and in situ osteoderms. The tail is the longest complete tail of any known ankylosaurid. Remarkably, the specimen is also the first Mongolian ankylosaurid that preserves impressions of the keratinous scales overlying the bony osteoderms. This specimen provides new information on the shape, texture, and ar− rangement of osteoderms. Large flat, keeled osteoderms are found over the pelvis, and osteoderms along the tail include large keeled osteoderms, elongate osteoderms lacking distinct apices, and medium−sized, oval osteoderms. The specimen differs in some respects from other Tarchia gigantea specimens, including the morphology of the neural spines of the tail club handle and several of the largest osteoderms.
Źródło:
Acta Palaeontologica Polonica; 2013, 58, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new helmeted frog of the genus Thaumastosaurus from the Eocene of England
Autorzy:
Holman, J A
Harrison, D.L.
Powiązania:
https://bibliotekanauki.pl/articles/20047.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Thaumastosaurus
Eocene
Thaumastosaurus bottii
England
frog
Thaumastosaurus wardi
paleontology
Opis:
Helmeted frogs with co−ossified skulls (Thaumastosaurus) were previously known in Europe only in the Eocene on the basis of Thaumastosaurus bottii from southwestern France and Thaumastosaurus wardi from coastal southern England. We describe Thaumastosaurus sulcatus, that differs from these species in having a different dermal sculpture pattern and tooth morphology. We suggest that the auburn colored tooth crown tips in T. sulcatus, as in some other vertebrates, reflect extra hardness for protection against tooth wear. Autochthonous Thaumastosaurus species in southern England support the concept that southern England and southwestern France were distinct faunal provinces in the Late Eocene.
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The lambeosaurine dinosaur Amurosaurus riabinini, from the Maastrichtian of Far Eastern Russia
Autorzy:
Godefroit, P
Bolotsky, Y.L.
Van Itterbeeck, J.
Powiązania:
https://bibliotekanauki.pl/articles/21185.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
phylogenesis
Late Cretaceous
Dinosauria
Russia
dinosaur
Amurosaurus riabinini
paleogeography
Maastrichtian
paleontology
Lambeosaurinae
Opis:
Amurosaurus riabinini Bolotsky and Kurzanov, 1991 (Dinosauria, Hadrosauridae) is described on the basis of numerous disarticulated bones from the Maastrichtian Udurchukan Formation of Blagoveschensk, Far Eastern Russia. Comparisons with North American palynozones and their well−calibrated ages suggest that this formation is late Maastrichtian in age. It is shown that A. riabinini is a valid species, characterised by cranial and postcranial autapomorphies. A phylogenetic analysis, based on 40 cranial, dental, and postcranial characters, indicates that this taxon occupies a relatively basal position within the lambeosaurine subfamily as the sister−taxon of a monophyletic group formed by the parasauroloph and corythosaur clades. This cladogram also demonstrates that lambeosaurines have an Asian origin. In eastern Asia, lambeosaurine dinosaurs dominate late Maastrichtian dinosaur localities, whereas this group is apparently no longer represented in synchronous localities from western North America.
Źródło:
Acta Palaeontologica Polonica; 2004, 49, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New skeleton from the Early Oligocene of Germany indicates a stem-group position of diomedeoidid birds
Autorzy:
De Pietri, V.L.
Berger, J.-P.
Pirkenseer, C.
Scherler, L.
Mayr, G.
Powiązania:
https://bibliotekanauki.pl/articles/22260.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
new skeleton
skeleton
Early Oligocene
Oligocene
Germany
stem-group position
diomedeoidid bird
bird
Aves
Diomedeoididae
phylogenesis
paleontology
Diomedeoides brodkorbi
Opis:
We report a new specimen of the extinct procellariiform species Diomedeoides brodkorbi (Aves, Diomedeoididae) from the early Oligocene (Rupelian) of Rheinweiler in southwestern Germany. The well−preserved partial skeleton allows the recognition and reassessment of new osteological details that bear on the phylogenetic affinities of diomedeoidids. The presence on the coracoid of a deeply excavated, cup−like facies articularis for the scapula suggests a stem group position of the Diomedeoididae within Procellariiformes, because this trait also occurs in stem−group representatives of several avian groups, as well as in Mesozoic non−neornithine birds, and is a plesiomorphic character. We hypothesize that the similarities of Diomedeoides to extant southern storm−petrels (Oceanitinae), such as the long mandibular symphysis, the small processus supracondylaris dorsalis and the long legs are plesiomorphic for Procellariiformes.
Źródło:
Acta Palaeontologica Polonica; 2010, 55, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New information on the pterosaur Tupandactylus imperator, with comments on the relationships of Tapejaridae
Autorzy:
Pinheiro, F.L.
Fortier, D.C.
Schultz, C.L.
Andrade,de, J.A.F.G.
Bantim, R.A.M.
Powiązania:
https://bibliotekanauki.pl/articles/22426.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
new information
pterosaur
Tupandactylus imperator
relationship
Tapejaridae
Pterosauria
phylogenesis
Crato Formation
Brazil
paleontology
Tapejarinae
Thalassodrominae
Opis:
A new specimen of Tupandactylus imperator, comprising an incomplete skull with associated lower jaw, is described. The material is the best preserved specimen of this species known so far and provides new information on the anatomy of this pterodactyloid pterosaur, especially with respect to the morphology of the lower jaw, the first one formally described for the species. Also, the new specimen shows an extensive preservation of soft tissues such as the soft−tissue component of the headcrest, ramphoteca associated with the premaxillae and lower jaw, as well as probable pycnofibres. A phylogenetic analysis was performed in order to test the relationships of the taxon within Tapejaridae. The results of the analysis support Tapejaridae, as well as monophyly of Tapejarinae and Thalassodrominae.
Źródło:
Acta Palaeontologica Polonica; 2011, 56, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mandible morphometrics, dental microwear pattern, and palaeobiology of the extinct Balearic dormouse Hypnomys morpheus
Autorzy:
Hautier, L
Bover, P.
Alcover, J.A.
Michaux, J.
Powiązania:
https://bibliotekanauki.pl/articles/20901.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
paleobiology
Balearic Islands
rodent
dormouse
Hypnomys morpheus
Pleistocene
deposit
Eliomys
Mammalia
Rodentia
morphological evolution
diet
Gliridae
Fourier analysis
morphometry
mandible
Opis:
Hypnomys morpheus is a giant endemic dormouse from the Pleistocene deposits of Mallorca and Menorca (Balearic Islands, Spain). The present paper aims to interpret the morphological divergence between the mandibles of Hypnomys and of its extant relative Eliomys, the outline of the mandible being used as a marker of the morphological divergence. By comparison with the mandible of Eliomys, the more massive mandible of Hypnomys has recorded an ecological shift of the insular lineage towards a more abrasive diet, including hard vegetable matter, and a different niche. A microwear analysis of the teeth of Hypnomys was simultaneously performed as it can shed light on the diet, and is independent from the comparison of the mandibles. Hypnomys possibly ate harder food items than Eliomys, and likely occupied most of the island environments. Hypnomys appears to have differentiated from its ancestral type toward a more generalized morphology because of the lack of competitors.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 2; 181-194
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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