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Equus cedralensis
Discussion
Derivation of name. From the Cedral locality where the type specimens were found. Paratype series. Fragments of mandible ramii with remains of several teeth, p3-m3 right and left (DP-4577) and several upper row: P2-M2 left (P2 DP-3841, P3-P4 DP-3842, and M1-M2 DP- 3839), and three P2-M1 (DP-3829 left, and DP-3830 and DP-4587 right)
Taxonomy
Equus cedralensis was named by Alberdi et al. (2014). Its type specimen is DP-2675 I-2 15 and DP-2674 I-2 8, a mandible ( A mandible ramus fragment formed by two specimens: one p2-m3 right row (DP-2675 I-2 15), and a second fragment of the symphysis with the anterior dentition (DP), and it is a 3D body fossil. Its type locality is Rancho La Amapola, which is in a Pleistocene lacustrine horizon in Mexico.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Equus cedralensis Alberdi et al. p. 232 figs. 3-9 |
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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.
†Equus cedralensis Alberdi et al. 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. T. Alberdi et al. 2014 | One of the smallest North American horse species for late Pleistocene, larger than Equus tau Owen. Although no complete skulls or mandibles, several upper and lower teeth rows (P2/p2-M3/m3), very small in size and some of the mandible rami are almost complete like the holotype. Upper and lower cheek teeth are morphologically very similar to the other horses found at Cedral, but smaller in size. The upper teeth have a protocone elongate more distal than mesially and with a small lingual groove; with styles, parastyle, and mesostyle on premolars wide with a groove and narrow without grooves on molars. The lower teeth have metaconid-metastylid (double knot), rounded or slightly angular, respectively. The ectoflexid is superficial in premolars and molars without crossing the isthmus, only on molars with an advanced wear the ectoflexid are deeper, crosses the isthmus, and could touch the linguaflexid; the linguaflexid is large and more or less U shape. The symphysis has a linear arcade with large canines (a possible male). The body mass is between 91.83 and 169.59 kg, and the mean is 138.41 kg following Alberdi et al. (1995) on the MCIII13. The appendicular skeleton is also small in size with metapodials not stilt-legged, clearly different from the other remains from Cedral and other Mexican localities. In fact, the Mexican new species has metapodials shorter and less slender than both francisci and alaskae. |
Measurements
No measurements are available
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| Source: g = genus, subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Nowak 1999, Ji et al. 2002, Carroll 1988, Lillegraven 1979 | |||||
Age range: Late/Upper Pleistocene or 0.12900 to 0.01170 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Pleistocene (late glacial) | Mexico (San Luis Potosi) | Equus cedralensis (type locality: 71277) |