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Alvarezsaurus calvoi
Taxonomy
Alvarezsaurus calvoi was named by Bonaparte (1991). Its type specimen is MUCPv-54, a set of postcrania, and it is a 3D body fossil. Its type locality is Boca del Sapo, Universidad Nacional del Comahue, which is in a Santonian fluvial-deltaic sandstone in the Bajo de la Carpa Formation of Argentina.
Synonymy list
| Year | Name and author |
|---|---|
| 1991 | Alvarezsaurus calvoi Bonaparte pp. 82-83 figs. 23-29 |
| 1994 | Alvarezsaurus calvoi Chiappe and Calvo p. 231 |
| 1994 | Alvarezsaurus calvoi Novas |
| 1995 | Alvarezsaurus calvoi Frey and Martill p. 409 |
| 1996 | Alvarezsaurus calvoi Bonaparte p. 95 |
| 1996 | Alvarezsaurus calvoi Chiappe p. 541 |
| 1996 | Alvarezsaurus calvoi Chiappe et al. p. 559 |
| 1996 | Alvarezsaurus calvoi Novas p. 673 |
| 1997 | Alvarezsaurus calvoi Novas pp. 161-162 |
| 2002 | Alvarezsaurus calvoi Chiappe p. 452 |
| 2002 | Alvarezsaurus calvoi Chiappe et al. p. 90 |
| 2004 | Alvarezsaurus calvoi Padian p. 211 |
| 2006 | Alvarezsaurus calvoi Martínez and Novas p. 243 |
| 2007 | Alvarezsaurus calvoi Martinelli and Vera p. 12 |
| 2007 | Alvarezsaurus calvoi Turner et al. p. 24 |
| 2008 | Alvarezsaurus calvoi Machado et al. p. 311 |
| 2009 | Alvarezsaurus calvoi Alifanov and Barsbold p. 94 |
| 2009 | Alvarezsaurus calvoi Ezcurra and Méndez p. 547 |
| 2009 | Alvarezsaurus calvoi Longrich and Currie p. 240 |
| 2009 | Alvarezsaurus calvoi Turner et al. p. 3 |
| 2010 | Alvarezsaurus calvoi Xu et al. p. 14 fig. 8 |
| 2011 | Alvarezsaurus calvoi Gianechini et al. p. 7 |
| 2012 | Alvarezsaurus calvoi Agnolin et al. p. 45 |
| 2012 | Alvarezsaurus calvoi Candeiro and Harris p. 74 |
| 2013 | Alvarezsaurus calvoi Novas et al. p. 188 |
| 2015 | Alvarezsaurus calvoi Méndez et al. p. 28 |
| 2016 | Alvarezsaurus calvoi Cruzado-Caballero et al. p. 53 |
| 2016 | Alvarezsaurus calvoi Filippi et al. p. 210 |
| 2023 | Alvarezsaurus calvoi Averianov et al. p. 68 |
| 2023 | Alvarezsaurus calvoi Kubo et al. p. 11 |
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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.
†Alvarezsaurus calvoi Bonaparte 1991
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. M. Chiappe et al. 2002 | Amphiplatyan cervicals with flat, paddle-shaped postzygapophyses; abrupt transition between cervicals and thoracic vertebrae; synsacrum less compressed than in Patagonykus, Mononykus, and Shuvuuia; spinous processes of proximal caudals absent or weakly developed; distal caudal vertebrae twice as long as proximal ones; scapula significantly smaller than in Mononykus and Shuvuuia; scapular blade curved in dorsal view; subequal pre- and postacetabular wings of ilium; postacetabular wing not depressed as in Shuvuuia and Parvicursor; metatarsal IV longer than metatarsal II; ungual phalanx of digit I with a short, ventral keel. |
Measurements
No measurements are available
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| Source: g = genus, subo = suborder, o = order | |||||
| References: Marsh 1875, Peczkis 1995, Benton 1983 | |||||