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Tytuł artykułu

The skull of Velociraptor [Theropoda] from the Late Cretaceous of Mongolia

Treść / Zawartość
Warianty tytułu
PL
Czaszka drapieznego dinozaura Velociraptor mongoliensis z poznej kredy Mongolii
Języki publikacji
EN
Abstrakty
EN
The well preserved material of the Late Cretaceous dromaeosaurid, Velociraptor mongoliensis, has allowed us to supplement earlier descriptions of the skull in this species. The skull of V. mongoliensis is similar to that of Deinonychus antirrhopus, but differs from the latter by: (1) laterally convex supratemporal arcade resulting in short, rounded supratemporal fenestra; (2) depressed nasal; (3) longer maxillary process of premaxilla; (4) lack of separate prefrontal, and (5) convex ventral border of the dentary. These differences, especially that in the structure of the temporal region, support generic distinction of Deinonychus and Velociraptor. Skulls of other dromaeosaurids are compared.
PL
W pracy opisano czaszkę i żuchwę niewielkiego, mierzącego około 2 m długości, drapieżnego dinozaura z rodziny Dromaeosauridae, Velociraptor mongoliensis Osborn, 1924, oraz przedstawiono rozprzestrzenienie geograficzne i stratygraficzne tej rodziny. Badany materiał pochodzi z osadów kampanu (górna kreda) pustyni Gobi (Mongolia) i został zebrany przez mongolskie, polsko-mongolskie, radziecko-mongolskie i japońsko-mongolskie ekspedycje paleontologiczne w latach 1970-1997. Dromeozaurydy żyły w okresie kredowym w Ameryce Północnej i Azji Środkowej. Z sześciu do ośmiu monotypowych rodzajów zaliczanych do tej rodziny, tylko mongolski Velociraptor jest reprezentowany przez dość liczne i kompletne szkielety, pozostałe rodzaje oparte są na pojedynczych i bardzo fragmentarycznych szczątkach, zaś czaszki (znacznie mniej kompletne) znane są tylko u dwóch północnoamerykariskich rodzajów Deinonychus i Dromaeosaurus. Przeprowadzona w pracy analiza anatomiczna kilku czaszek V. mongoliensis i porównanie ich z czaszką wczesnokredowego Deinonychus antirrhopus Ostrom, 1969 wykazały, że nie ma dostatecznych podstaw do uznania nazwy rodzajowej Deinonychus za młodszy synonim nazwy Velociraptor, co było sugerowane przez niektórych badaczy (Paul 1988). Potwierdzono, że oba te rodzaje są ze sobą bliżej spokrewnione niż z innymi przedstawicielami dromeozaurydów.
Wydawca
-
Rocznik
Tom
44
Numer
2
Opis fizyczny
s.189-219,rys.,fot.,tab.,bibliogr.
Twórcy
autor
  • Institute of Geology, Mongolian Academy of Sciences, Enkh Taivani Gudamji, Ulan Bator 210351, Mongolia
autor
  • Instytut Paleobiologii PAN, ul. Twarda 51/55, PL-00-818 Warszawa, Poland
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