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Mongolosaurus haplodon
Taxonomy
Mongolosaurus haplodon was named by Gilmore (1933). Its type specimen is AMNH 6710, a partial skeleton, and it is a 3D body fossil. Its type locality is Hu Khung Ulan (AMNH quarry 714), which is in an Aptian/Albian terrestrial siliciclastic in the On Gong Formation of China.
It was considered a nomen dubium by Dong (1992); it was misspelled as Mongolosaurus hoplodon by Dong (1994), Wilson (2002) and Buffetaut et al. (2002); it was considered a nomen dubium by Barrett et al. (2002) and Upchurch et al. (2004); it was considered a nomen dubium by Buffetaut et al. (2006).
It was considered a nomen dubium by Dong (1992); it was misspelled as Mongolosaurus hoplodon by Dong (1994), Wilson (2002) and Buffetaut et al. (2002); it was considered a nomen dubium by Barrett et al. (2002) and Upchurch et al. (2004); it was considered a nomen dubium by Buffetaut et al. (2006).
Synonymy list
Year | Name and author |
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1933 | Mongolosaurus haplodon Gilmore p. 11 figs. 4-11 |
1935 | Mongolosaurus haplodon Young |
1937 | Mongolosaurus hoplodon Young p. 21 |
1939 | Mongolosaurus haplodon Kuhn p. 112 |
1939 | Mongolosaurus haplodon Riabinin p. 6 |
1958 | Mongolosaurus hoplodon Young p. 24 |
1964 | Mongolosaurus haplodon Tatarinov p. 545 |
1970 | Mongolosaurus haplodon Steel p. 82 |
1980 | Mongolisaurus hoplodon Chao |
1986 | Mongolosaurus hoplodon Zhao p. 68 |
1990 | Mongolosaurus haplodon McIntosh p. 398 |
1994 | Mongolosaurus hoplodon Dong p. 2098 |
2002 | Mongolosaurus haplodon Buffetaut et al. p. 97 |
2002 | Mongolosaurus haplodon Wilson p. 249 |
2006 | Mongolosaurus haplodon Wilson p. 171 |
2007 | Mongolosaurus haplodon Barrett and Wang p. 268 |
2011 | Mongolosaurus haplodon Díez Díaz et al. p. 522 |
2011 | Mongolosaurus haplodon Mannion |
2012 | Mongolosaurus haplodon D'Emic |
2012 | Mongolosaurus haplodon Díez Díaz et al. p. 266 |
2023 | Mongolosaurus haplodon Tatehata et al. p. 355 |
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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.
†Mongolosaurus haplodon Gilmore 1933
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Diagnosis
Reference | Diagnosis | |
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P. D. Mannion 2011 | Mongolosaurus can be diagnosed on the basis of several autapomorphies (marked with an ∗), as well as a unique combination of characters not seen in other sauropods: ventral surface of the atlantal intercentrum is anteroposteriorly longer than the dorsal surface, forming an anteroventral projection (also present in flagellicaudatans but not in other titanosauriforms, except very weakly in Futalognkosaurus and Rapetosaurus); dorsal edges of the posterior articular surfaces of anterior cervical centra project more posteriorly than the ventral edges∗; postaxial cervical parapophyses excavated ventrally∗; hypertrophied epipophyses on postaxial cervical postzygapophyses (also present in Erketu); midline keel present on ventral surface of axis (also present in non-titanosaurs and Futalognkosaurus) and postaxial anterior cervical vertebrae (also present in non-titanosaurs and Gondwanatitan); cervical neural spine does not extend beyond the height of the epipophyses∗; postaxial spinoprezygapophyseal laminae form a dorsoventrally elongate X-shape in anterior view∗; dorsal half of the spinoprezygapophyseal laminae aligned nearly horizontally∗; near-horizontally aligned, lateromedially oriented spinopostzygapophyseal laminae∗; cervical vertebra 3 neural spine distally bifurcated (also present in flagellicaudatans and Camarasaurus). |
Measurements
No measurements are available
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Source: infrao = infraorder | |||||
Reference: Marsh 1875 |