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Rotodactylus
Taxonomy
Rotodactylus was named by Peabody (1948). It is considered to be a form taxon.
It was assigned to Thecodontia by Kuhn (1971); to Pseudosuchia by Demathieu and Haubold (1972); to Rotodactylidae by Peabody (1948), Kuhn (1963), Haubold (1969), Haubold (1971), Haubold (1974) and Gand (1974); and to Dinosauromorpha by Gand and Demathieu (2005) and Gand et al. (2012).
It was assigned to Thecodontia by Kuhn (1971); to Pseudosuchia by Demathieu and Haubold (1972); to Rotodactylidae by Peabody (1948), Kuhn (1963), Haubold (1969), Haubold (1971), Haubold (1974) and Gand (1974); and to Dinosauromorpha by Gand and Demathieu (2005) and Gand et al. (2012).
Synonymy list
| Year | Name and author |
|---|---|
| 1948 | Rotodactylus Peabody p. 319 |
| 1963 | Rotodactylus Kuhn p. 76 |
| 1969 | Rotodactylus Haubold p. 95 |
| 1971 | Rotodactylus Haubold p. 59 |
| 1971 | Rotodactylus Kuhn p. 23 |
| 1972 | Rotodactylus Demathieu and Haubold p. 805 |
| 1974 | Rotodactylus Gand p. 9 |
| 1974 | Rotodactylus Haubold p. 40 |
| 2005 | Rotodactylus Gand and Demathieu p. 726 |
| 2012 | Rotodactylus Gand et al. p. 69 |
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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.
G. †Rotodactylus Peabody 1948
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†Rotodactylus bessieri Demathieu 1984
†Rotodactylus bradyi Peabody 1948
†Rotodactylus kronachensis Demathieu and Leitz 1982
†Rotodactylus lucasi Demathieu and Gand 1973
†Rotodactylus matthesi Haubold 1967
†Rotodactylus rati Demathieu 1971
†Rotodactylus tumidus Morton 1897
†Rotodactylus velox Demathieu and Gand 1974
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. E. Peabody 1948 | Long-striding, sometimes semi-bipedal trackways of a small pentadactyl reptile. The manus is always closer to the midline and is always overstepped even in the walking gait by the much larger pes in a moderately narrow trackway pattern; pace angulation (pes) as high as 146 degrees in a running trackway and as low as 93 degrees in a walking trackway. The pes impression indicates a foot with an advanced digitigrade posture and with a strongly developed but slender digit V rotated to the rear where it functioned as a prop. Manus digit V mayor may not be rotated backward but it has a propping function. Digit IV on both manus and pes is longer than III; digit I may fail to impress; claws are evident on digits I-IV. Scaly plantar surface, rarely shown, is characterized by transversely elongate scales on the digit axis bordered by granular scales. |
Measurements
No measurements are available
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| Source: subo = suborder, subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009, Benton 1983 | |||||
Collections (29 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Triassic | United Kingdom (England) | Rhynchosauroides tumidus (164930) | |
| Early/Lower Triassic | Germany (Rhineland-Palatinate) | R. sp. (222574) | |
| Spathian | USA (Arizona) | R. cursorius (95107) | |
| Spathian | USA (Wyoming) | R. sp. (135636) | |
| Aegean - Bithynian | USA (Arizona) | R. bradyi (135410) | |
| Aegean - Bithynian | USA (Utah) | R. mckeei (114092) | |
| Anisian | Italy (Trentino-Alto Adige) | R. sp. (194584) | |
| Anisian | France (Languedoc-Rousillon) | R. bessieri (199936) | |
| Anisian | Poland (Swietoryzskie) | R. sp. (175801) | |
| Anisian | Morocco (Marrakech-Safi) | R. sp. (199902 199907) | |
| Illyrian | Italy (Trentino-Alto Adige) | R. sp. (196816) | |
| Illyrian | Algeria (Tizi Ouzou) | R. bessieri (196719) | |
| Anisian - Ladinian | France (Bourgogne-Franche-Comté) | R. lucasi (68223) R. lucasi, R. rati (68222) R. lucasi, R. velox (62182) R. rati (28462 199910) R. sp. (199909 199912 199928) R. sp., R. lucasi (24834) R. sp., R. velox (62183) | |
| Anisian - Ladinian | France (Auvergne-Rhône-Alpes) | R. rati (192151) | |
| Anisian - Ladinian | France (Saône-et-Loire) | R. sp., R. lucasi (36226) | |
| Middle Triassic | France (Bourgogne-Franche-Comté) | R. sp., R. lucasi (28092) | |
| Late/Upper Triassic | United Kingdom (England) | Rhynchosauroides tumidus (174686) | |
| Norian | USA (Colorado) | R. sp. (55259) | |
| Turonian | Egypt (Aswan) | R. sp. (138678) |