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Gobivenator mongoliensis
Taxonomy
Gobivenator mongoliensis was named by Tsuihiji et al. (2014). Its type specimen is MPC-D 100/86, a skeleton (Articulated skeleton missing middle cervical vertebrae, most gastralia, forelimb elements distal to the elbow joints, right femur, tibia, and fibula, and left t), and it is a 3D body fossil. Its type locality is Dzamin Khond [HMNS-GIN], which is in a Campanian eolian sandstone in the Djadokhta Formation of Mongolia.
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Gobivenator mongoliensis Tsuihiji et al. p. 132 figs. 1-5 |
| 2015 | Gobivenator mongoliensis Funston et al. p. 186 |
| 2017 | Gobivenator mongoliensis Chinzorig et al. p. 11 |
| 2017 | Gobivenator mongoliensis Gianechini et al. p. 11 |
| 2017 | Gobivenator mongoliensis van der Reest and Currie p. 920 |
| 2020 | Gobivenator mongoliensis Czepiński p. 491 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Gobivenator mongoliensis Tsuihiji et al. 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. Tsuihiji et al. 2014 | The present specimen possesses one of the three troodontid synapomorphies identified by Turner et al. (2012), namely a quadrate strongly inclined anteroventrally so that the distal end lies far forward of the proximal end. In addition, it shares the following derived characters with troodontids more de-rived than Anchiornis: foramen magnum taller than wide,distal caudals possessing sulci on neural arches instead of neural spines, and asymmetrical foot with slender second metatarsal and robust fourth metatarsal. These characteristics confirm the troodontid affinity of the present specimen.G. mongoliensis is different from other troodontids in possessing a fossa on the surangular in front of the posterior surangular foramen (Fig.3b, c) and a pointed anterior end of the fused parietal that wedges into a V-shaped notch between the contralateral frontals (Fig.4). Gracile anterior, posterior,and ventral rami of the postorbital and dorsoventrally elongated proximal chevrons (up to 4.5 times as long as the height of the preceding caudal vertebrae) are other potential autapomorphies of the present specimen.G. mongoliensis and supposedly coeval Byronosaurus jaffei (but see Makovicky (2008) for discussion that localities that have been assigned to the Djadokhta Formation are in fact diachronic, pointing to possibilities that Dzamin Khond producing the former may not be coeval to Ukhaa Tolgod producing the latter)share unserrated teeth and are different from all other troodontids in having a shallow groove along the buccal margin of the maxilla (Makovicky et al.2003). On the other hand, Gobivenator is distinguished from Byronosaurus by the characters such as the interfenestral bar recessed from the lateral surface of the maxilla and the posterior margin of the external naris lying farther anteriorly than the anterior border of the antorbital fossa. Gobivenator also lacks a large pocket on the lateral aspect of the lacrimal between the anterior and descending (preorbital) rami present in Byronosaurus (Makovicky et al.2003). |
Measurements
No measurements are available
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| Source: f = family, o = order | |||||
| References: Marsh 1875, Holtz et al. 2000 | |||||