First elaphrosaurine theropod dinosaur (Ceratosauria: Noasauridae) from Australia — A cervical vertebra from the Early Cretaceous of Victoria

2020 ◽  
Vol 84 ◽  
pp. 284-295
Author(s):  
Stephen F. Poropat ◽  
Adele H. Pentland ◽  
Ruairidh J. Duncan ◽  
Joseph J. Bevitt ◽  
Patricia Vickers-Rich ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Cervical Vertebra ◽  
Theropod Dinosaur

scholarly journals First spinosaurid dinosaur from Australia and the cosmopolitanism of Cretaceous dinosaur faunas

2011 ◽  
Vol 7 (6) ◽  
pp. 933-936 ◽  
Author(s):  
Paul M. Barrett ◽  
Roger B. J. Benson ◽  
Thomas H. Rich ◽  
Patricia Vickers-Rich
Keyword(s):  
Early Cretaceous ◽  
Fossil Record ◽  
Cervical Vertebra ◽  
Global Distribution ◽  
Geographical Range ◽  
Theropod Dinosaur

A cervical vertebra from the Early Cretaceous of Victoria represents the first Australian spinosaurid theropod dinosaur. This discovery significantly extends the geographical range of spinosaurids, suggesting that the clade obtained a near-global distribution before the onset of Pangaean fragmentation. The combined presence of spinosaurid, neovenatorid, tyrannosauroid and dromaeosaurid theropods in the Australian Cretaceous undermines previous suggestions that the dinosaur fauna of this region was either largely endemic or predominantly ‘Gondwanan’ in composition. Many lineages are well-represented in both Laurasia and Gondwana, and these observations suggest that Early–‘middle’ Cretaceous theropod clades possessed more cosmopolitan distributions than assumed previously, and that caution is necessary when attempting to establish palaeobiogeographic patterns on the basis of a patchily distributed fossil record.

scholarly journals Theropod tracks from the Jurassic–Cretaceous boundary, Tuchengzi Formation, Chengde, China: Review and new observations

2021 ◽  
Vol 2 (2) ◽  
pp. 271-282
Author(s):  
Lida Xing ◽  
Martin G. Lockley
Keyword(s):  
Early Cretaceous ◽  
Recent Literature ◽  
Size Range ◽  
Lower Jurassic ◽  
Theropod Dinosaur ◽  
Rock Wall ◽  
Explicit Reference ◽  
Theropod Tracks ◽  
Shape And Size ◽  
Tuchengzi Formation

Previously known theropod dinosaur footprints preserved as natural casts in the Tuchengzi Formation, on a rock wall beside the railway in Nanshuangmiao Village, Shangbancheng Town, Chengde City, were originally assigned to ichnogenus Anchisauripus and tentatively attributed to oviraptosaurs. The assemblage was restudied in more detail by examining the entire assemblage of 55 tracks associated with two horizons. The size range of the 27 measured tracks suggests a more diverse grallatorid–eubrontid assemblage and potentially greater diversity of theropod trackmakers. The label Anchisauripus, which has fallen into disuse in some recent literature, implies trackmakers of medium shape and size in the grallatorid–eubrontid morphological spectrum. However, given the presence of other theropod ichnotaxa in the Jurassic to Early Cretaceous strata of the Tuchengzi Formation and time equivalent units we suggest that explicit reference to the Grallator-Anchisauripus-Eubrontes (GAE) plexus, or simply the term Grallator-Eubrontes plexus be confined to Lower Jurassic assemblages as originally defined and intended. Further study centered on the 16 known Tuchengzi assemblages and older theropod ichnfaunas is necessary to confirm or refute the degree to which grallatorid–eubrontid assemblages from these different epochs are similar or convergent. Even if the tracks are morphologically very similar inferences regarding trackmaker identity are problematic because the same theropodan trackmaker species, genera or even families were not present in both epochs.

A new abelisauroid theropod from northwestern Patagonia

2006 ◽  
Vol 43 (9) ◽  
pp. 1283-1289 ◽  
Author(s):  
Rodolfo A Coria ◽  
Philip J Currie ◽  
Ariana Paulina Carabajal
Keyword(s):  
Early Cretaceous ◽  
Late Cretaceous ◽  
First Record ◽  
South American ◽  
Middle Section ◽  
Theropod Dinosaur ◽  
Channel Deposits

The Argentinean record of abelisauroid theropods begins in the Early Cretaceous (Ligabueino) and spans most of the Late Cretaceous, from Cenomanian (Ilokelesia, Xenotarsosaurus, and Ekrixinatosaurus) to Campanian–Maastrichtian (Abelisaurus, Carnotaurus, Aucasaurus, and Noasaurus). A fragmentary specimen of a theropod dinosaur was collected in 2000 from the middle section of the Lisandro Formation (Turonian?) at Cerro Bayo Mesa, Neuquén Province, Argentina. The fossil-bearing level, which is part of the Lisandro Formation that also yielded the remains of the basal ornithopod Anabisetia saldiviai, corresponds to a reddish, massive mudstone linked with fluvial channel deposits. The theropod identified as MCF-PVPH-237 is an abelisauroid theropod that increases our knowledge about the evolution of South American Abelisauroidea and is the first record of this clade from the Lisandro Formation.

A new specimen of the theropod dinosaur Baryonyx from the early Cretaceous of Portugal and taxonomic validity of Suchosaurus

Zootaxa ◽  
2011 ◽  
Vol 2827 (1) ◽  
pp. 54 ◽  
Author(s):  
OCTÁVIO MATEUS ◽  
RICARDO ARAÚJO ◽  
Carlos Natário ◽  
RUI CASTANHINHA
Keyword(s):  
Iberian Peninsula ◽  
Early Cretaceous ◽  
Late Jurassic ◽  
Enamel Surface ◽  
Tooth Root ◽  
Theropod Dinosaur ◽  
Incertae Sedis ◽  
Caudal Vertebrae ◽  
Nomina Dubia

Although the Late Jurassic of Portugal has provided abundant dinosaur fossils, material from the Early Cretaceous is scarce. This paper reports new cranial and postcranial material of the theropod dinosaur Baryonyx walkeri found in the Barremian (Papo Seco Formation) of Portugal. This specimen, found at Praia das Aguncheiras, Cabo Espichel, consists of a partial dentary, isolated teeth, pedal ungual, two calcanea, presacral and caudal vertebrae, fragmentary pubis, scapula, and rib fragments. It represents the most complete spinosaurid yet discovered in the Iberian Peninsula and the most complete dinosaur from the Early Cretaceous of Portugal. This specimen is confidently identified as a member of Baryonychinae due to the presence of conical teeth with flutes and denticles in a dentary rosette. The specimen ML1190 shares the following characteristics with Baryonyx walkeri: enamel surface with small (nearly vertical) wrinkles, variable denticle size along the carinae, 6–7 denticles per mm, wrinkles forming a 45 degree angle near the carinae, and tooth root longer than crown. In addition, dubious taxa based on teeth morphology such as Suchosaurus cultridens (Owen, 1840–1845), and Suchosaurus girardi (Sauvage 1897–98; Antunes & Mateus 2003) are discussed, based on comparisons with well-known material such as Baryonyx walkeri Charig & Milner, 1986. Suchosaurus cultridens and S. girardi are considered as nomina dubia due to the lack of diagnostic apomorphies, but both specimens are referred to Baryonychinae incertae sedis.

scholarly journals A Reassessment ofKelmayisaurus petrolicus, a Large Theropod Dinosaur from the Early Cretaceous of China

2012 ◽  
Vol 57 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Stephen L. Brusatte ◽  
Roger B.J. Benson ◽  
Xing Xu
Keyword(s):  
Early Cretaceous ◽  
Theropod Dinosaur

scholarly journals Countershading and Stripes in the Theropod Dinosaur Sinosauropteryx Reveal Heterogeneous Habitats in the Early Cretaceous Jehol Biota

2017 ◽  
Vol 27 (21) ◽  
pp. 3337-3343.e2 ◽  
Author(s):  
Fiann M. Smithwick ◽  
Robert Nicholls ◽  
Innes C. Cuthill ◽  
Jakob Vinther
Keyword(s):  
Early Cretaceous ◽  
Jehol Biota ◽  
Theropod Dinosaur ◽  
Heterogeneous Habitats

scholarly journals An Early Cretaceous theropod dinosaur from Brazil sheds light on the cranial evolution of the Abelisauridae

2020 ◽  
Author(s):  
Hussam ZAHER ◽  
Diego POL ◽  
Bruno A. NAVARRO ◽  
Rafael DELCOURT ◽  
Alberto B. CARVALHO
Keyword(s):  
Early Cretaceous ◽  
Late Cretaceous ◽  
Early Stage ◽  
Feeding Strategy ◽  
Occipital Region ◽  
Theropod Dinosaur

Abelisaurid theropods dominated the predator role across Gondwana during the Late Cretaceous. They are characterized by highly reduced forelimbs and one of the most specialized cranial morphologies among carnivorous dinosaurs, exemplified by a broad skull, short rostrum, high occipital region, and highly kinetic intramandibular joint, suggestive of a specialized feeding strategy. Late Cretaceous abelisaurids are known from some remarkably complete taxa with well-preserved skulls. However, little is known about the pattern of character transformation that led to their highly modified condition because there are no well-preserved abelisaurids before the Late Cretaceous. Here we report a basal abelisaurid from the Early Cretaceous of Brazil that preserves a complete skull and reveals an early stage in the cranial evolution of the group. It lacks the specialized temporal and mandibular features characteristic of derived abelisaurids, including the kinetic intramandibular joint and knob-like dorsal projection of the parietals.

scholarly journals A Carcharodontosaurid tooth from the Hasandong Formation (Lower Cretaceous) of South Korea

2020 ◽  
Vol 50 ◽  
pp. 2-10
Author(s):  
Chan-gyu Yun
Keyword(s):  
South Korea ◽  
Early Cretaceous ◽  
North American ◽  
Lower Cretaceous ◽  
Theropod Dinosaur ◽  
Large Size ◽  
Individual Variations ◽  
First Time ◽  
Cretaceous Deposits

A large tooth of theropod dinosaur that was recovered from the Hasandong Formation (Lower Cretaceous; Aptian-Albian) in Daedo island, Hadong Couty, South Gyeongsang Province of South Korea is redescribed. Although the tooth was misidentified as a "Prodeinodon"-like megalosaurid theropod at the first time, detailed comparisons with known theropod dentition anatomy strongly indicate that this tooth belongs to an Acrocanthosaurus-like basal carcharodontosaurid theropod. This referral is supported by its combination of large size, ovoid-shaped cervix outline, mesial carina that does not reach the cervix, labially displaced distal carina and large number of denticles. This tooth is different from other carcharodontosaurid teeth from the same formation in several anatomical aspects (e.g., smaller overall size, presence of transverse lines adjacent to the distal carina, presence of interdenticular sulci in distal carina, denticle densities, crown basal ratio), indicating that carcharodontosaurid diversity in the Early Cretaceous of Korea could have been higher, although these differences may represent positional or individual variations. The presence of Acrocanthosaurus-like theropod teeth (e.g., "Prodeinodon", "Wakinosaurus") from early Cretaceous deposits (Valanginian-Cenomanian) of South Korea, Japan, Mongolia and China indicates that North American Acrocanthosaurus atokensis possibly represents a form that immigrated from the Asia.

An allosaurid theropod dinosaur from the Early Cretaceous of Victoria, Australia

1981 ◽  
Vol 5 (2) ◽  
pp. 141-146 ◽  
Author(s):  
R.E. Molnar ◽  
Timothy F. Flannery ◽  
Thomas H.V. Rich
Keyword(s):  
Early Cretaceous ◽  
Theropod Dinosaur
Sign in / Sign up

Export Citation Format

Share Document