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Segnosaurus galbinensis
Taxonomy
Segnosaurus galbinensis was named by Perle (1979). Its type specimen is GIN 100/80, a partial skeleton, and it is a 3D body fossil. Its type locality is Amtgay [SMPE], which is in a Cenomanian/Santonian terrestrial horizon in the Baynshire Formation of Mongolia. It is the type species of Segnosaurus. It was considered monophyletic by Currie (2000).
Synonymy list
| Year | Name and author |
|---|---|
| 1979 | Segnosaurus galbinensis Perle |
| 1980 | Segnosaurus galbinensis Barsbold and Perle pp. 188-189 |
| 1981 | Segnosaurus galbinensis Olshevsky p. 39 |
| 1983 | Segnosaurus galbinensis Barsbold p. 104 |
| 1992 | Segnosaurus ghalbiensis Currie p. 247 |
| 1993 | Segnosaurus ghalbiensis Currie and Eberth p. 138 |
| 1994 | Segnosaurus galbinensis Russell and Dong p. 2108 |
| 1995 | Segnosaurus galbinensis Nessov p. 37 |
| 1997 | Segnosaurus galbinensis Barsbold p. 448 |
| 2000 | Segnosaurus galbinensis Currie p. 440 |
| 2000 | Segnosaurus galbinensis Foster and Chure p. 8 |
| 2002 | Segnosaurus galbinesis Xu et al. p. 236 |
| 2003 | Segnosaurus galbinensis Rauhut p. 41 |
| 2004 | Segnosaurus galbinensis Clark et al. p. 152 |
| 2007 | Segnosaurus galbinensis Li et al. p. 545 |
| 2007 | Segnosaurus galbinensis Turner et al. p. 26 |
| 2010 | Segnosaurus galbinensis Zanno p. 522 |
| 2012 | Segnosaurus galbinensis Qian et al. p. 340 |
| 2013 | Segnosaurus galbinensis Pu et al. |
| 2015 | Segnosaurus galbiensis Tsuihiji et al. p. 64 |
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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.
†Segnosaurus galbinensis Perle 1979
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. E. Zanno 2010 | A therizinosaurian bearing the following autapomorphies: well-developed coronoid process on mandible (not figured); straight-shafted humerus lacking cranially deflected distal aspect; dorsal margin of ilium with pronounced ventral overhang; caudal process of ischium caudally extensive, nearly 50% of craniocaudal depth of obturator process; hypertrophied epiphyses on distal metatarsals (noted by Perle, 1979, yet could not be confirmed first hand; not figured). Segnosaurus can be differentiated from Nothronychus by the following two characters (ischium with subrectangular obturator process; subcircular obturator foramen); from Enigmosaurus by the following three characters (dorsoventrally deep obturator process that does not fuse medially with its counterpart; unfused pubic boot; craniocaudally wide distal pubic shaft); and from both Nothronychus and Enigmosaurus in possessing a deep brevis fossa and lacking a well developed caudal projection on pubic boot (Fig. 4). |
Measurements
No measurements are available
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| Source: g = genus, superf = superfamily, o = order | |||||
| References: Holtz et al. 2000, Marsh 1875, Peczkis 1995 | |||||
Age range: base of the Cenomanian to the top of the Santonian or 100.50000 to 83.60000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cenomanian - Santonian | Mongolia (Dornogov) | Segnosaurus galbinensis (118167) | |
| Cenomanian - Santonian | Mongolia (Omnogov) | Segnosaurus galbinensis (type locality: 79724 224602) |