Temat: relationship formation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

Tytuł:: A new Miocene penguin from Patagonia and its phylogenetic relationships
Autorzy:: Acosta, Hospitaleche C
Tambussi, C.
Donato, M.
Cozzuol, M.
Powiązania:: https://bibliotekanauki.pl/articles/23119.pdf
Data publikacji:: 2007
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: phylogenetic relationship
penguin
Argentina
Miocene
Aves
Spheniscidae
Puerto Madryn Formation
Chubut Province
Madrynornis mirandus
paleontology
Opis:: We describe a new medium−sized penguin, Madrynornis mirandus gen. et sp. nov., from the early late Miocene Puerto Madryn Formation, Chubut Province, Argentina. Although it is evident that extant and fossil penguins form a remarkably homogeneous family of birds, Spheniscidae, their within−group phylogenetic relationships are less obvious. In order to identify the phylogenetic position of the new taxon, we conducted a phylogenetic analysis using 44 osteological characters sampled from 14 representative species of all living genera and five fossil species of Spheniscidae. The family is clearly monophyletic and Madrynornis mirandus is closely related to living taxa. Our phylogenetic interpretation is congruent with biostratigraphic data, with Paraptenodytes from the early Miocene (about 20 Ma) located at the base of the Spheniscidae. Classically, two basic tarsometatarsal types were recognized (one for pre−Miocene and the other for the post−Miocene penguins) based on the pattern of the proximal foramina and the hypotarsus. Madrynornis mirandus exhibits an arrangement of the proximal foramina and a degree of metatarsals fusion similar to that in the living forms, although its elongation index (total length/proximal width) is reminiscent of the extinct Paraptenodytes(a penguin historically recognized as a pre−Miocene form, coming from the early Miocene of Argentina). Madrynornis reveals that the two basic tarsometatarsal types co−existed among Miocene penguins.
Źródło:: Acta Palaeontologica Polonica; 2007, 52, 2
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Osteology and relationships of Olorotitan arharensis, a hollow−crested hadrosaurid dinosaur from the latest Cretaceous of Far Eastern Russia
Autorzy:: Godefroit, P.
Bolotsky, Y.L.
Bolotsky, I.Y.
Powiązania:: https://bibliotekanauki.pl/articles/20406.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: paleontology
osteology
relationship
Olorotitan arharensis
dinosaur
hadrosaurid dinosaur
Cretaceous
Russia
Dinosauria
Ornithischia
Hadrosauridae
Lambeosaurinae
phylogenesis
Late Cretaceous
Maastrichtian Udurchukan Formation
Corythosaurus casuarius Hypacrosaurus stebingeri
Hypacrosaurus altispinus
Opis:: The holotype of Olorotitan arharensis from the Maastrichtian Udurchukan Formation in Kundur, Far Eastern Russia, is the most complete dinosaur discovered in Russia and one of the best preserved lambeosaurines outside western North America. This taxon is diagnosed by following autapomorphies: large helmet−like hollow crest higher than the rest of the skull and extending caudally well beyond the level of the occiput; very high postorbital process of jugal (ratio height of postorbital process/length of jugal = 1); rostral portion of the jugal shorter than in other lambeosaurines, with a perfectly straight rostral margin; very asymmetrical maxilla in lateral view, with ventral margin distinctly downturned; very elongated neck composed of 18 cervical vertebrae; tibia as high as the femur; shorter cnemial crest, about one fifth of tibia length. A phylogenetic analysis, based on 118 cranial, dental, and postcranial characters, indicates that Olorotitan is a member of the Corythosaurini clade, and is the sister taxon of Corythosaurus casuarius, Hypacrosaurus stebingeri, and Hypacrosaurus altispinus. The high diversity and mosaic distribution of Maastrichtian hadrosaurid faunas in the Amur−Heilongjiang region are the result of a complex palaeogeographical history and imply that many independent hadrosaurid lineages dispersed readily between western America and eastern Asia at the end of the Cretaceous.
Źródło:: Acta Palaeontologica Polonica; 2012, 57, 3
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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