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Taxonomy
Cynarctoides whistleri was named by Wang and Tedford (2008). Its type specimen is OCPC 21796, a mandible (right horizontal ramal fragment with c–m1), and it is a 3D body fossil. Its type locality is Cooper Center 02019, which is in a Hemingfordian terrestrial sandstone in the Sespe Formation of California.
Synonymy list
| Year | Name and author |
|---|---|
| 2008 | Cynarctoides whistleri Wang et al. |
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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.
†Cynarctoides whistleri Wang and Tedford 2008
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| X. Wang and R. H. Tedford 2008 | Cynarctoides whis- tleri is more derived than primitive Cynarctoides species, such as Cynarctoides lemur (Cope, 1879a), Cynarctoides roii (Macdonald, 1963), and Cynarctoide harlowi (Loomis, 1932), in its transversely narrow premolars and high- crowned, cuspidate m1 talonid cusps. Compared with the slightly more derived species of Cynarc- toides luskensis Wang, Tedford, and Taylor, 1999, and C. gawnae, it is also derived in its well-developed protostylid; tall-crowned m1 en- toconid and hypoconid, which are of equal height; stronger crista obliqua; and presence of a narrow labial cingulum on m1 trigonid, all of which are characters that become more derived in C. acridens (Barbour and Cook, 1914) and Cynarctoides emryi Wang, Tedford, and Taylor, 1999. Cynarctoides whistleri differs from C. acridens and C. emryi in its primitive characters, such as m1 entoconid not exceeding hypoconid in height, protostylid and metastylid less well differentiated from the protoconid and metaco- nid, and less well developed crista obliqua. Cynarctoides whistleri has the following autapo- morphies: short jaw; short and tall-crowned p2–3 without anterior and posterior accessory cusps, p4 with a very distinct posterior accessory cusp, m1 short and wide, and short m1 trigonid with an obliquely oriented paraconid blade. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Ji et al. 2002, Hendy et al. 2009, Carroll 1988, Nowak 1991, Lillegraven 1979 | |||||
Age range: Hemingfordian or 20.43000 to 15.97000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Hemingfordian | USA (California) | Cynarctoides gawnae (type locality: 167830) | |
| Hemingfordian | USA (Texas) | Cynarctoides acridens (18635) |