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Palaeictops altimontis
Taxonomy
Palaeictops altimontis was named by Velazco and Novacek (2016). Its type specimen is AMNH 96250, a skull, and it is a 3D body fossil. Its type locality is East Fork Basin, which is in an Uintan terrestrial horizon in the Tepee Trail Formation of Wyoming.
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Palaeictops altimontis Velazco and Novacek p. 19 |
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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.
†Palaeictops altimontis Velazco and Novacek 2016
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. M. Velazco and M. J. Novacek 2016 | Like Palaeictops bridgeri in having p5 with open prefossid and shortened talonid, but di ers in smaller size, in lacking an anterior accessory cuspule at labial base of paraconid; p5 metaconid aligned less obliquely relatively to protoconid; more anteroposteriorly compressed trigonid on m2; and less transverse M2 with a deeper ecto exus. Di ers from P. bicuspis, P. mul- ticuspis, and P. matthewi in having smaller, more anteriorly separated paraconid on p5 and lower trigonids on m1–3. Skull like P. bicuspis but unlike Leptictis in having single sagittal crest ( g. 13A). Skull like Leptictis but unlike P. bicuspis in having posteriorly narrow nasal elements. Basi- cranium di ers from Leptictis (cf. g. 14 and Novacek, 1986: g. 22) in having: (1) a postglenoid foramen positioned more laterally and farther from the anteroexternal edge of the tympanic cavity; (2) a more transversely ared basioccipital that overlaps ventrally the promontorium of the petrosal; (3) shallower grooves on the promontorium for the promontory and stapedial branches of the internal carotid artery; (4) a posterior lacerate foramen only slightly larger than the stapedius fossa (much larger and more oval than stapedius fossa in Leptictis); (5) a cochlear fossula with a more expanded, dorsal rim; (6) a narrower bridge of the mastoid tubercle of the petrosal extending from ventral rim of the cochlear fossula between the stylomastoid foramen and stapedius fossa; (7) a paraoccipital process that is less extensive, so that the distance is shorter between stylomastoid foramen and posterior margin of basicranium; and (8) a shallower groove on paraoccipital process for the digastric muscle. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Ji et al. 2002, Meehan and Martin 2010, Hendy et al. 2009, Carroll 1988 | |||||