scholarly journals The furculae of the dromaeosaurid dinosaurDakotaraptor steiniare trionychid turtle entoplastra

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1691 ◽  
Author(s):  
Victoria M. Arbour ◽  
Lindsay E. Zanno ◽  
Derek W. Larson ◽  
David C. Evans ◽  
Hans-Dieter Sues
Keyword(s):  
South Dakota ◽  
Upper Cretaceous ◽  
Theropod Dinosaur ◽  
Hell Creek Formation ◽  
Holotype Specimen

Dakotaraptor steiniis a recently described dromaeosaurid dinosaur from the Upper Cretaceous (Maastrichtian) Hell Creek Formation of South Dakota. Included within theD. steinihypodigm are three elements originally identified as furculae, one of which was made part of the holotype specimen. We show that the elements described asD. steini‘furculae’ are not theropod dinosaur furculae, but are rather trionychid turtle entoplastra referable to cf.Axestemys splendida. The hypodigm ofD. steinishould be adjusted accordingly.

scholarly journals The furculae of the dromaeosaurid dinosaur Dakotaraptor steini are trionychid turtle entoplastra

2015 ◽  
Author(s):  
Victoria M. Arbour ◽  
Lindsay E. Zanno ◽  
Derek W. Larson ◽  
David C. Evans ◽  
Hans-Dieter Sues
Keyword(s):  
South Dakota ◽  
Upper Cretaceous ◽  
Skeletal Remains ◽  
Theropod Dinosaur ◽  
Hell Creek Formation ◽  
Holotype Specimen

Dakotaraptor steini is a recently described dromaeosaurid dinosaur from the Upper Cretaceous (Maastrichtian) Hell Creek Formation of South Dakota. Included within the D. steini hypodigm are three elements originally identified as furculae: one which is part of the holotype specimen and two referred specimens. We show that the elements described as D. steini ‘furculae’ are not theropod dinosaur furculae, but rather trionychid turtle entoplastra. Given that the holotype 'furcula' is not referable to Dromaeosauridae and that the specimen is a disarticulated individual based on skeletal remains from a multitaxic bonebed, the holotype of Dakotaraptor steini is a chimera.

scholarly journals The furculae of the dromaeosaurid dinosaur Dakotaraptor steini are trionychid turtle entoplastra

2015 ◽  
Author(s):  
Victoria M. Arbour ◽  
Lindsay E. Zanno ◽  
Derek W. Larson ◽  
David C. Evans ◽  
Hans-Dieter Sues
Keyword(s):  
South Dakota ◽  
Upper Cretaceous ◽  
Skeletal Remains ◽  
Theropod Dinosaur ◽  
Hell Creek Formation ◽  
Holotype Specimen

Dakotaraptor steini is a recently described dromaeosaurid dinosaur from the Upper Cretaceous (Maastrichtian) Hell Creek Formation of South Dakota. Included within the D. steini hypodigm are three elements originally identified as furculae: one which is part of the holotype specimen and two referred specimens. We show that the elements described as D. steini ‘furculae’ are not theropod dinosaur furculae, but rather trionychid turtle entoplastra. Given that the holotype 'furcula' is not referable to Dromaeosauridae and that the specimen is a disarticulated individual based on skeletal remains from a multitaxic bonebed, the holotype of Dakotaraptor steini is a chimera.

New caenagnathid (Dinosauria: Theropoda) specimens from the Upper Cretaceous of North America and Asia

1993 ◽  
Vol 30 (10) ◽  
pp. 2255-2272 ◽  
Author(s):  
Philip J. Currie ◽  
Stephen J. Godfrey ◽  
Lev Nessov
Keyword(s):  
North America ◽  
South Dakota ◽  
Upper Cretaceous ◽  
New Genus ◽  
Food Type ◽  
New Genus And Species ◽  
Hell Creek Formation ◽  
Central Asian ◽  
Southern Alberta ◽  
Judith River Formation

New specimens of caenagnathid theropods are described from the Judith River Formation (Campanian) of southern Alberta, the Hell Creek Formation (Maastrichtian) of South Dakota, and the Bissekty Formation (Turonian) of Uzbekistan. With the exception of the Hell Creek specimen, and a vertebra from Alberta, all are from the symphysial regions of the lower jaws. Caenagnathids are rare and poorly known animals, and the described fossils preserve heretofore unknown features, including vascular grooves and foramina in the symphysial region, and the pattern of overlapping sutures between jaw elements. Most of the new specimens are different from the holotype of Caenagnathus collinsi Sternberg and may represent the second described species, Caenagnathus sternbergi. The two jaws from the Bissekty Formation are the first oviraptorosaurian jaws described from Uzbekistan and represent a new genus and species anatomically closer to Caenagnathus than to central Asian forms like Oviraptor, Conchoraptor and Ingenia. There are at least five characters that distinguish caenagnathid and oviraptorid jaws, but it is concluded that the length of the symphysial region must be used with caution. Jaw anatomy supports the idea that oviraptorids were well adapted for eating eggs, although their diet was probably not restricted to one food type.

Parataxonomic classification of ornithoid eggshell fragments from the Oldman Formation (Judith River Group; Upper Cretaceous), southern Alberta

1996 ◽  
Vol 33 (12) ◽  
pp. 1655-1667 ◽  
Author(s):  
Darla K. Zelenitsky ◽  
L. V. Hills ◽  
Philip J. Currie
Keyword(s):  
Late Cretaceous ◽  
Shell Thickness ◽  
Upper Cretaceous ◽  
Theropod Dinosaur ◽  
Surface Sculpture ◽  
External Zone ◽  
Theropod Dinosaurs ◽  
Southern Alberta ◽  
The Family

Examination of a large number of eggshell fragments collected from the Oldman Formation of southern Alberta reveals a greater ootaxonomic diversity than is known from complete eggs or clutches. Three new oogenera and oospecies of the ornithoid-ratite morphotype and one of the ornithoid-prismatic morphotype are established, based on the eggshell fragments. Porituberoolithus warnerensis oogen. et oosp. nov. and Continuoolithus canadensis oogen. et oosp. nov. have a microstructure similar to that of elongatoolithid eggs of theropod dinosaurs. Tristraguloolithus cracioides oogen. et oosp. nov. and Dispersituberoolithus exilis oogen. et oosp. nov. possess an external zone and thus have a microstructure like modern avian eggshell. Tristraguloolithus has a shell thickness, microstructure, and surface sculpture similar to those of recent bird eggshell of the family Cracidae (order Galliformes). Dispersituberoolithus exhibits the primitive or normal eggshell condition of some recent neognathous avian taxa. The ootaxa described indicate a diversity of both avian and theropod dinosaur egg layers within Devil's Coulee and Knight's Ranch, southern Alberta, during the Late Cretaceous.

Metatarsals of a large caenagnathid cf. Anzu wyliei (Theropoda: Oviraptorosauria) from the Hell Creek Formation in South Dakota, U.S.A.

2021 ◽  
Author(s):  
Kousuke Tsujimura ◽  
Makoto Manabe ◽  
Yumiko Chiba ◽  
Takanobu Tsuihiji
Keyword(s):  
South Dakota ◽  
Present Finding ◽  
Hell Creek Formation ◽  
Anatomical Information ◽  
Present Description ◽  
Bone Beds

Isolated metatarsals III and IV of a caenagnathid theropod likely referable to Anzu wyliei are described from a locality of the Hell Creek Formation in northwestern South Dakota of the U.S.A. These bones are missing from the holotype and only partial shafts have been described for a specimen referable to this species. Accordingly, the present description adds further anatomical information on this already well-known species of Caenagnathidae. The present finding also demonstrates the significance of isolated or fragmentary specimens found in multitaxic bone beds.

Ontogenetic changes in long-bone histology of an ornithomimid theropod dinosaur from the Upper Cretaceous Bissekty Formation of Uzbekistan

2016 ◽  
Vol 29 (6) ◽  
pp. 715-729 ◽  
Author(s):  
Pavel P. Skutschas ◽  
Elizaveta A. Boitsova ◽  
Alexander O. Averianov ◽  
Hans-Dieter Sues
Keyword(s):  
Upper Cretaceous ◽  
Bone Histology ◽  
Long Bone ◽  
Ontogenetic Changes ◽  
Theropod Dinosaur
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