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Taxonomy
Oxydactylus exilis was named by Matthew and Macdonald (1960). Its type specimen is AMNH 12997, a partial skeleton (partial skull and fore and hind limbs), and it is a 3D body fossil. Its type locality is AMNH Rosebud 5, which is in a Harrisonian terrestrial horizon in the Rosebud Formation of South Dakota.
It was recombined as Michenia exilis by Honey and Taylor (1978), Honey et al. (1998) and Honey (2007).
It was recombined as Michenia exilis by Honey and Taylor (1978), Honey et al. (1998) and Honey (2007).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1960 | Oxydactylus exilis Matthew and Macdonald p. 2 figs. 1 - 4 |
| 1977 | Michenia australis Stevens p. 48 figs. 15A-D |
| 1978 | Michenia exilis Honey and Taylor |
| 1998 | Michenia exilis Honey et al. |
| 2007 | Michenia exilis Honey p. 188 |
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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.
†Michenia exilis Matthew and Macdonald 1960
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Invalid names: Michenia australis Stevens 1977 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. D. Matthew and J. R. Macdonald 1960 | I1-M8 (estimated), 172 mm.; P2-M8, 88mm. Incisors and canine small, p1 compressed, two-rooted, with a long diastema behind it, p2-4 of subequal length,P4 longer than wide, P8 with anterior and posterior inner cingula not quite meeting medialy. Molars very brachyodont. Muzzle slender, antorbital fossa round, well defined. Lower jaw slender anteriorly, canine moderately compressed, close to incisors, long diastemata behind canine and P1. P3 with rudimentary inner crest, paraconids of premolars distinct. | |
| M. S. Stevens 1977 (Michenia australis) | Differs from Michenia agatensis by its smaller size, more prominent molar styles and ribs, and unfused metacarpal; from Miotylopus by its more prominent molar styles and ribs. |
Measurements
No measurements are available
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| Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Nowak 1999, Carroll 1988, Nowak 1991, Hendy et al. 2009 | |||||
Age range: Harrisonian or 24.80000 to 18.50000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Arikareean | USA (Texas) | Michenia australis (178058) | |
| Harrisonian | USA (South Dakota) | Oxydactylus exilis (type locality: 17745) | |
| Harrisonian | USA (Texas) | Michenia australis (17767 17769 17776) |