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Desmatippus texanus
Taxonomy
Anchippus texanus was named by Leidy (1868) [genotype]. It is a 3D body fossil.
It was recombined as Parahippus texanus by Gidley (1904), Peterson (1906), Gidley (1907), Osborn (1918), Schlaikjer (1937), Stirton (1940), Macdonald (1963), Macdonald (1970), Forsten (1975); it was recombined as Desmatippus texanus by MacFadden (1998); it was considered a nomen dubium by Macdonald (1992).
It was recombined as Parahippus texanus by Gidley (1904), Peterson (1906), Gidley (1907), Osborn (1918), Schlaikjer (1937), Stirton (1940), Macdonald (1963), Macdonald (1970), Forsten (1975); it was recombined as Desmatippus texanus by MacFadden (1998); it was considered a nomen dubium by Macdonald (1992).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1868 | Anchippus texanus Leidy p. 231 |
| 1902 | Anchippus texanus Hay p. 615 |
| 1904 | Parahippus texanus Gidley p. 192 |
| 1906 | Parahippus texanus Peterson |
| 1907 | Parahippus texanus Gidley p. 885 |
| 1918 | Parahippus texanus Osborn p. 84 figs. Plates 8.3, 9.10. Text Fig. 59 |
| 1937 | Parahippus texanus Schlaikjer p. 271 |
| 1940 | Parahippus texanus Stirton p. 177 |
| 1963 | Parahippus texanus Macdonald |
| 1970 | Parahippus texanus Macdonald |
| 1975 | Parahippus texanus Forsten p. 20 |
| 1991 | Anchippus texanus Albright |
| 1998 | Desmatippus texanus MacFadden p. 546 |
| 1999 | Anchippus texanus Albright |
| 2019 | Anchippus texanus Albright et al. p. 180 |
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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.
†Desmatippus texanus Leidy 1868
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn 1918 | (Leidy, 1868, 1869, Osborn, 1918) (1) Ectoloph of same form as m Anchitherium; (2) inner lobes
(protocone and hypocone] proportionately less robust; (3) median lobes (protoconule, metaconule] proportionately more robust; (4) posteromedian lobe [metaloph] joining outer lobes [ectoloph]; (5) from middle of metaloph a process [crochet] given off. (6) (Leidy, 1868, p. 232) "This process looks as if disposed to join the contiguous portion of the antero-median lobe, together with it to form a crescentoid lobe, embracing the antero-external one, as in the corresponding columns of equine teeth. No such arrangement exists in Anchitherium. [7] A triangular tubercle, as in the latter genus, occupies the space at the back of th:e crown, and it appears as if its anterior angle had a disposition to join the contiguous portion of the postero-median lobe [metaloph], to form with it a crescentoid lobe, in like manner as in the former case, to embrace the postero-external lobe." (8) Strong anterointernal cingulum embracing protocone; (9) protoloph interrupted, uniting with parastyle. | |
| A. -M. Forsten 1975 | Large, brachyodont. Metaloph connected to ectoloph; protoconule marked, metaconule marked or submerged; crochet simple, disconnected. Anterior cingulum, no lingual cingulum. Cement scarce or none. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Carroll 1988, Ji et al. 2002, Hendy et al. 2009, Lillegraven 1979 | |||||
Age range: base of the Chattian to the top of the Hemingfordian or 27.30000 to 16.30000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Geringian - Monroecreekian | USA (Florida) | Miohippus sp. (17726) | |
| Arikareean | USA (Florida) | Parahippus sp. (17859) | |
| Chattian | USA (Florida) | Anchippus texanus (17860) | |
| Chattian | USA (South Carolina) | Anchippus texanus (214901) | |
| Harrisonian | USA (South Dakota) | Parahippus texanus (17748) | |
| Aquitanian | USA (Texas) | Anchippus texanus (18663) | |
| Early/Lower Hemingfordian | USA (Texas) | Parahippus texanus (18694) | |
| Hemingfordian | USA (Texas) | Parahippus texanus (18617) |