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Taxonomy
Oxydactylus floridanus was named by Simpson (1932). Its type specimen is FSGS V5247, a maxilla (part of right maxilla with P2-M3), and it is a 3D body fossil. Its type locality is Thomas Farm, which is in a Hemingfordian terrestrial sandstone/claystone in the Alachua Formation of Florida. It is the type species of Nothokemas.
It was recombined as Nothokemas floridanus by White (1947), Maglio (1966), McKenna (1966), Patton (1967), Patton (1969), Honey et al. (1998), Albright (1999) and Marriott et al. (2022).
It was recombined as Nothokemas floridanus by White (1947), Maglio (1966), McKenna (1966), Patton (1967), Patton (1969), Honey et al. (1998), Albright (1999) and Marriott et al. (2022).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1932 | Oxydactylus floridanus Simpson p. 35 figs. 20 - 21 |
| 1940 | Paratylopus grandis White p. 33 figs. Pl. 3 |
| 1947 | Nothokemas floridanus White |
| 1947 | Nothokemas grandis White p. 508 figs. 5, 6 |
| 1966 | Nothokemas floridanus Maglio |
| 1966 | Nothokemas floridanus McKenna |
| 1967 | Nothokemas floridanus Patton |
| 1969 | Nothokemas floridanus Patton |
| 1998 | Nothokemas floridanus Honey et al. |
| 1999 | Nothokemas floridanus Albright |
| 2022 | Nothokemas floridanus Marriott et al. p. 298 figs. Figure 2 |
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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.
†Nothokemas floridanus Simpson 1932
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Invalid names: Paratylopus grandis White 1940 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. G. Simpson 1932 | About the size of O. brachyodontus. P1-P2 diastema very long. P very large, completely two-rooted, with strong continuous internal cingulum. P3 with inner crescent likewise complete, but not much expanded. P2 also relatively large and completely two-rooted. P2 to P4 each with increasingly prominent antero-internal and posterior ( or posterointernal) folds. | |
| T. E. White 1940 (Paratylopus grandis) | A large species, one sixth larger than P. cameloides (Wortman). | |
| T. E. White 1947 (Nothokemas grandis) | A large hornless artiodactyl with unreduced nasals;
lacrymal vacuity as large as the orbit; rostrum high, narrow, and moderately elongate; postorbital bar complete; teeth slightly more hypso- dont than Syndyoceras; premolars and molars similar to those of Pro- toceras; internal crescents of the upper molars and the external cres- cents of the lower molars separate to the base of the tooth; mesostyle of the molars rudimentary; heel of third lower molar single lobed; orbit and internal nares posterior to third upper molar; cuboid and navicular probably separate. | |
| K. Marriott et al. 2022 | Largest species of Nothokemas, about 20% larger than N. hidalgensis, with a more robust diastema and symphysis than N. hidalgensis. The p3 and p4 are relatively slender compared to N. hidalgensis. |
Measurements
No measurements are available
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| Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Hendy et al. 2009, Carroll 1988, Nowak 1999, Lillegraven 1979 | |||||
Age range: Hemingfordian or 20.43000 to 15.97000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Miocene | USA (Texas) | Nothokemas floridanus (18701) | |
| Hemingfordian | USA (Florida) | Nothokemas grandis, Oxydactylus floridanus (type locality: 18597) Oxydactylus floridanus (18586) |