New specimens of the crested theropod dinosaur Elmisaurus rarus from Mongolia

Currie, Philip J.; Funston, Gregory F.; Osmolska, H

doi:10.4202/app.00130.2014

Cited by 21 publications

(48 citation statements)

References 21 publications

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“…The medial metatarsal covers the proximal articular surface of the metatarsal IV. Each tarsal fuses with the corresponding metatarsal, which is similar to those of some caenagnathids ( Elmisaurus , Leptorhynchos ) 30, 31 . Metatarsals I through V are preserved.…”

Section: Resultssupporting

confidence: 62%

High diversity of the Ganzhou Oviraptorid Fauna increased by a new “cassowary-like” crested species

Lü

Kundrát

et al. 2017

Sci Rep

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A new oviraptorid dinosaur from the Late Cretaceous of Ganzhou, bringing oviraptrotid diversity of this region to seven taxa, is described. It is characterized by a distinct cassowary-like crest on the skull, no pleurocoels on the centra from the second through fourth cervical vertebrae, a neck twice as long as the dorsal vertebral column and slightly longer than the forelimb (including the manus). Phylogenetic analysis recovers the new oviraptorid taxon, Corythoraptor jacobsi, as closely related to Huanansaurus from Ganzhou. Osteochronology suggests that the type specimen of Corythoraptor had not reached stationary growth stage but died while decreasing growth rates. The histology implies that it would correspond to an immature individual approximately eight years old. We hypothesize, based on the inner structure compared to that in modern cassowaries, that the prominent casque of Corythoraptor was a multifunction-structure utilized in display, communication and probably expression of the fitness during mating seasons.

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Section: Resultssupporting

confidence: 62%

High diversity of the Ganzhou Oviraptorid Fauna increased by a new “cassowary-like” crested species

Lü

Kundrát

et al. 2017

Sci Rep

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“…;Vickers-Rich et al 2002;Makovicky et al 2004;Fowler et al 2011;Xu et al 2011;Currie et al 2016;Funston et al 2016;McFeeters et al 2016;Tsogtbaatar et al 2017). …”

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Differential locomotor and predatory strategies of Gondwanan and derived Laurasian dromaeosaurids (Dinosauria, Theropoda, Paraves): Inferences from morphometric and comparative anatomical studies

2020

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Tetrapod limbs morphology is a reliable proxy of locomotor capacities. Beyond this, other aspects of life habits, such as predation abilities, can also be relevant to determine main morphofunctional appendicular properties, which ultimately reflect a compromise between different factors of the biological role. Dromaeosauridae is a dinosaur clade belonging to Theropoda, a group of bipedal predators. Dromaeosaurids represent an interesting study case, in which the hindlimbs have been proposed to be involved in both locomotion and predation activity. A peculiar feature characterizing all dromaeosaurids is a modified second pedal digit, which is typically related to predation. This theropod group is closely related to birds and diversified during the Cretaceous Period, mainly in the Northern Hemisphere (Laurasia). However, a subclade of dromaeosaurids, the Unenlagiinae, was recently recognized for Gondwana.Nevertheless, there are morphological differences between derived Laurasian dromaeosaurids (eudromaeosaurs) and unenlagiines. Such differences are observed in the proportions between hindlimb bones and in the presence of a subarctometatarsalian condition in unenlagiines, which is mainly characterized by a proximally constricted metatarsal III. To evaluate the function of these divergent morphologies, we conducted morphometric analyses and comparisons of qualitative morphological aspects, encompassing unenlagiines, other dromaeosaurids, as well as taxa from other theropod groups, including extant birds. The former approach consisted of two phylogenetic principal component analyses, one based on the main measurements of the hindlimb, and the other focused on the lengths of the pedal phalanges. The first analysis drew the unenlagiines close to taxa with long tibiae, as well as long and slender metatarsi. Instead, eudromaeosaurs are closer to taxa with shorter tibiae, and shorter and wider metatarsi. The second analysis showed that eudromaeosaurs and unenlagiines have similar phalangeal proportions, including the elongation of distal phalanges. However, the shorter second phalanx of the pedal digit II of eudromaeosaurs could have increased the force generated by this digit, which was the main predatory tool of the autopodium. This, together with a shorter and wider metatarsus, and a marked hinge-like morphology of the articular surfaces of metatarsals | 773 GIANECHINI Et Al.

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“…The posterior hemicondyles of the distal end take the form of thick ridges and are both oriented obliquely, with the medial one extending proximolaterally and the lateral one proximomedially. The condyles converge on the central part of the shaft as they extend proximally, a feature also seen in some other caenagnathids 30 , 31 . The medial condyle is transversely wider and much more prominent in the posterior direction than the lateral condyle.…”

Section: Resultsmentioning

confidence: 54%

“…Chirostenotes pergracilis, Elmisaurus rarus and Avimimus portentosus ) the compression is sufficiently extreme to produce an arctometatarsalian pes. However, the more distal portion of the shaft is transversely much wider than anteroposteriorly deep in some caenagnathids 30 , 31 , as in some theropods with a proximally pinched metatarsal III such as the troodontid Sinovenator (IVPP V12583). The compressed proximal portion of the anterior surface of metatarsal III forms a prominent flange (Fig.…”

Section: Resultsmentioning

confidence: 99%

A new caenagnathid dinosaur from the Upper Cretaceous Wangshi Group of Shandong, China, with comments on size variation among oviraptorosaurs

Wang²,

Chen³

et al. 2018

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The bone-beds of the Upper Cretaceous Wangshi Group in Zhucheng, Shandong, China are rich in fossil remains of the gigantic hadrosaurid Shantungosaurus. Here we report a new oviraptorosaur, Anomalipes zhaoi gen. et sp. nov., based on a recently collected specimen comprising a partial left hindlimb from the Kugou Locality in Zhucheng. This specimen’s systematic position was assessed by three numerical cladistic analyses based on recently published theropod phylogenetic datasets, with the inclusion of several new characters. Anomalipes zhaoi differs from other known caenagnathids in having a unique combination of features: femoral head anteroposteriorly narrow and with significant posterior orientation; accessory trochanter low and confluent with lesser trochanter; lateral ridge present on femoral lateral surface; weak fourth trochanter present; metatarsal III with triangular proximal articular surface, prominent anterior flange near proximal end, highly asymmetrical hemicondyles, and longitudinal groove on distal articular surface; and ungual of pedal digit II with lateral collateral groove deeper and more dorsally located than medial groove. The holotype of Anomalipes zhaoi is smaller than is typical for Caenagnathidae but larger than is typical for the other major oviraptorosaurian subclade, Oviraptoridae. Size comparisons among oviraptorisaurians show that the Caenagnathidae vary much more widely in size than the Oviraptoridae.

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New specimens of the crested theropod dinosaur Elmisaurus rarus from Mongolia

Abstract: New specimens of Elmisaurus rarus from the Upper Cretaceous of Mongolia (Nemegt

Cited by 21 publications

References 21 publications

High diversity of the Ganzhou Oviraptorid Fauna increased by a new “cassowary-like” crested species

High diversity of the Ganzhou Oviraptorid Fauna increased by a new “cassowary-like” crested species

Differential locomotor and predatory strategies of Gondwanan and derived Laurasian dromaeosaurids (Dinosauria, Theropoda, Paraves): Inferences from morphometric and comparative anatomical studies

A new caenagnathid dinosaur from the Upper Cretaceous Wangshi Group of Shandong, China, with comments on size variation among oviraptorosaurs

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