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Therizinosaurus cheloniformis
Taxonomy
Therizinosaurus cheloniformis was named by Maleev (1954). Its type specimen is PIN 551/483, a set of limb elements, and it is a 3D body fossil. Its type locality is Therizinosaurus type, Nemegt (PROXY), which is in a Maastrichtian terrestrial horizon in the Nemegt Formation of Mongolia. It is the type species of Therizinosaurus. It was considered monophyletic by Currie (2000).
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Therizinosaurus cheloniformis Maleev p. 108 figs. 2-3 |
| 1974 | Therezinosaurus cheloniformis Rozhdestvensky p. 147 |
| 1976 | Therizinosaurus cheloniformis Barsbold p. 78 |
| 1977 | Therizinosaurus cheloniformis Rozhdestvensky p. 112 |
| 1980 | Therizinosaurus cheloniformis Molnar p. 134 fig. 3 |
| 1983 | Therizinosaurus cheloniformis Barsbold p. 102 |
| 1992 | Therizinosaurus cheloniformis Currie p. 247 |
| 1994 | Therizinosaurus cheloniformis Russell and Dong p. 2108 |
| 1995 | Therizinosaurus cheloniformis Clark et al. p. 24A |
| 1997 | Therizinosaurus cheloniformis Barsbold p. 448 |
| 1997 | Therizinosaurus cheloniformis Coy p. 692 |
| 1997 | Therizinosaurus cheloniformis Osmólska p. 472 |
| 2000 | Therizinosaurus cheloniformis Currie p. 439 |
| 2003 | Therizinosaurus cheloniformis Rauhut p. 41 |
| 2004 | Therizinosaurus cheloniformis Clark et al. p. 152 |
| 2006 | Therizinosaurus cheloniformis Kobayashi and Barsbold p. 202 |
| 2007 | Therizinosaurus cheloniformis Li et al. p. 545 |
| 2009 | Therizinosaurus cheloniformis Zanno et al. p. S15 |
| 2010 | Therizinosaurus cheloniformis Zanno p. 524 |
| 2012 | Therizinosaurus cheloniformis Bell et al. p. 188 |
| 2012 | Therizinosaurus cheloniformis Qian et al. p. 339 |
| 2012 | Therizinosaurus cheloniformis Senter et al. p. 1 |
| 2013 | Therizinosaurus cheloniformis Pu et al. |
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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.
†Therizinosaurus cheloniformis Maleev 1954
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. E. Zanno 2010 | A therizinosaurian bearing the following autapomorphies: deltopectoral crest on humerus hypertrophied, exceeding 60% length of humerus; metacarpal I greater than two-thirds length of metacarpal III; metacarpal I with enlarged medial crest connecting medial distal condyle and proximal medial lobe; manual unguals transversely compressed (transverse dimension less than 20% dorsoventral height in cross-section), poorly recurved, and hypertrophied, proximodistal length to dorsoventral height greater than 4:1; and manual unguals lack ventrally projecting flexor tubercle in lateral view (Fig. 5). |
Measurements
No measurements are available
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| Source: superf = superfamily, o = order | |||||
| References: Holtz et al. 2000, Kiessling 2004, Marsh 1875 | |||||
Age range: Maastrichtian or 72.20000 to 66.00000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Maastrichtian | Mongolia (Omnogov) | Therizinosaurus cheloniformis (type locality: 88554 179625) |