A new ornithomimid dinosaur from the Upper Cretaceous Packard Shale formation (Cabullona Group) Sonora, México

Serrano-Brañas, Claudia Inés; Torres-Rodríguez, Esperanza; Reyes-Luna, Paola Carolina; González-Ramírez, Ixchel; González–León, Carlos M.

doi:10.1016/j.cretres.2015.08.013

Cited by 20 publications

(31 citation statements)

References 21 publications

(7 reference statements)

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“…This morphology is different from any other ornithomimosaurs where posterior edge is either convex or concave 32–35 ; the proximoventral ridge of II-1 is round, II-3 is relatively larger than the other two unguals, and the pedal unguals are anteroposteriorly more slender and curve slightly downward.…”

Section: Discussioncontrasting

confidence: 64%

First Ornithomimid (Theropoda, Ornithomimosauria) from the Upper Cretaceous Djadokhta Formation of Tögrögiin Shiree, Mongolia

Chinzorig

Kobayashi

Tsogtbaatar

et al. 2017

Sci Rep

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The Upper Cretaceous Djadokhta Formation has been intensively surveyed for its fossil vertebrate fauna for nearly a century. Amongst other theropods, dromaeosaurids and parvicursorines are common in the formation, but ornithomimosaurs are extremely rare. A new ornithomimosaur material was discovered from the Djadokhta Formation, represented by eolian deposits, of the Tögrögiin Shiree locality, Mongolia. This is only the third ornithomimosaur specimen reported from this formation, and includes the astragalus, the calcaneum, the third distal tarsal, and a complete pes. The new material is clearly belonged to Ornithomimidae by its arctometatarsalian foot condition and has the following unique characters; unevenly developed pair of concavities of the third distal tarsal, curved contacts between the proximal ends of second and fourth metatarsals, the elongate fourth digit, and a laterally inclined medial condyle on phalanx IV-1. These diagnostic characters of the Djadokhtan ornithomimosaur indicate that this is a new taxon. Our phylogenetic analysis supports three clades within derived ornithomimosaurs, and the new taxon is placed a member of the derived ornithomimosaurs. The present specimen is the first ornithomimid record from eolian Tögrögiin Shiree locality, and is indicative of their capability to adapt to arid environments.

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Section: Discussioncontrasting

confidence: 64%

First Ornithomimid (Theropoda, Ornithomimosauria) from the Upper Cretaceous Djadokhta Formation of Tögrögiin Shiree, Mongolia

Chinzorig

Kobayashi

Tsogtbaatar

et al. 2017

Sci Rep

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“…USNM V5453 and USNM V6108 measure 82 mm and 79 mm at their centers and 34 mm and 32 mm wide as measured mediolaterally along their proximal faces, respectively (Gilmore, 1920). These specimens compare very well with other ornithomimosaurian taxa (Gilmore, 1920;Buffetaut, Suteethorn & Tong, 2009;Serrano-Brañas et al, 2016), and compare especially well with pedal phalanx II-1 of Gallimimus bullatus and Struthiomimus altus in having condyles noticeably separated by a deep groove, a slightly expanded rim around the proximal articular facet, and a slight fossa at the distal end of their dorsal faces. These two phalanges are similar in color to metatarsal II and III from site 41615 and somewhat to caudal vertebra USNM V5701.…”

supporting

confidence: 51%

“…This pedal claw measures 55.5 mm long anteroposteriorly and 17 mm wide mediolaterally along its proximal articular facet (Gilmore, 1920). The specimen is most similar to the pedal ungual of Struthiomimus altus figured in Serrano-Brañas et al (2016). Another pedal ungual, NHRD-AP 2014.s.197 (figure 7B), was recovered from the Dinosaur Park site and is very similar to USNM V6107.…”

mentioning

confidence: 74%

Redescription of Arundel formation Ornithomimosaur material and a reinterpretation of Nedcolbertia justinhofmanni as an “Ostrich Dinosaur”: Biogeographic implications

Brownstein

2016

Preprint

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The fossil record of dinosaurs from the Early Cretaceous of eastern North America is scant, especially since few formations from the east are fossiliferous. Among those that are is the Arundel Formation of the eastern seaboard, which has produced among the best dinosaur faunas known from the Early Cretaceous of eastern North America. The diverse dinosaur fauna of this formation has been thoroughly discussed previously, but few of the dinosaur species originally described from the Arundel are still regarded as valid genera. Much of the Arundel material is in need of review and redescription. Among the fossils of dinosaurs from this formation are those referred to ornithomimosaurs. Here, I redescribe ornithomimosaur remains from the Arundel facies of Prince George’s County, Maryland which may be from two distinct ornithomimosaur taxa. These remains provide key information on the theropods of the Early Cretaceous of Eastern North America. Recent discoveries of small theropod material from the Arundel Formation are also reviewed and described for the first time. The description of the Arundel material herein along with recent discoveries of basal ornithomimosaurs in the past 15 years has allowed for comparisons with the coelurosaur Nedcolbertia justinhofmanni, suggesting the latter animal was a basal ornithomimosaurian dinosaur rather than a “generalized” coelurosaur as which it was originally described. Comparisons between the Arundel ornithomimosaur material and similar Asian and European specimens suggest that both extremely basal ornithomimosaurs and more intermediate or derived forms coexisted throughout the northern hemisphere during the Early Cretaceous. Additionally, the possible presence of two distinct ornithomimosaurs in the Arundel allies the Arundel facies with Asian sediments in their coelurosaurian fauna.

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“…The metatarsal III and pedal ungual described by Gilmore (1920) were also referred to as Ornithomimus sp. or Ornithomimus affinis by Serrano-Brañas et al (2016). However, if any of the material were to be determined a distinct and valid species in the future, the original species name ( grandis ) given by Lull (1911) would take priority.…”

Section: Introductionmentioning

confidence: 99%

Description of Arundel Clay ornithomimosaur material and a reinterpretation ofNedcolbertia justinhofmannias an “Ostrich Dinosaur”: biogeographic implications

Brownstein¹

2017

PeerJ

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The fossil record of dinosaurs from the Early Cretaceous of Eastern North America is scant, especially since a few stratigraphic units from the east are fossiliferous. Among these stratigraphic units, the Arundel Clay of the eastern seaboard has produced the best-characterized dinosaur faunas known from the Early Cretaceous of Eastern North America. The diverse dinosaur fauna of the Arundel Clay has been thoroughly discussed previously, but a few of the dinosaur species originally described from the Arundel Clay are still regarded as valid genera. Much of the Arundel material is in need of review and redescription. Among the fossils of dinosaurs from this stratigraphic unit are those referred to ornithomimosaurs. Here, the researcher describes ornithomimosaur remains from the Arundel Clay of Prince George’s County, Maryland which may be from two distinct ornithomimosaur taxa. These remains provide key information on the theropods of the Early Cretaceous of Eastern North America. Recent discoveries of small theropod material from the Arundel Clay possibly belonging to ornithomimosaurs are also reviewed and described for the first time. The description of the Arundel material herein along with recent discoveries of basal ornithomimosaurs in the past 15 years has allowed for comparisons with the coelurosaur Nedcolbertia justinhofmanni, suggesting the latter animal was a basal ornithomimosaur rather than a “generalized” coelurosaur as it was originally described. Comparisons between the Arundel ornithomimosaur material and similar Asian and European specimens suggest that both extremely basal ornithomimosaurs and more intermediate or derived forms may have coexisted throughout the northern hemisphere during the Early Cretaceous.

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A new ornithomimid dinosaur from the Upper Cretaceous Packard Shale formation (Cabullona Group) Sonora, México

Cited by 20 publications

References 21 publications

First Ornithomimid (Theropoda, Ornithomimosauria) from the Upper Cretaceous Djadokhta Formation of Tögrögiin Shiree, Mongolia

First Ornithomimid (Theropoda, Ornithomimosauria) from the Upper Cretaceous Djadokhta Formation of Tögrögiin Shiree, Mongolia

Redescription of Arundel formation Ornithomimosaur material and a reinterpretation of Nedcolbertia justinhofmanni as an “Ostrich Dinosaur”: Biogeographic implications

Description of Arundel Clay ornithomimosaur material and a reinterpretation ofNedcolbertia justinhofmannias an “Ostrich Dinosaur”: biogeographic implications

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