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Peregocetus pacificus
Taxonomy
Peregocetus pacificus was named by Lambert et al. (2019). Its type specimen is MUSM 3580, a partial skeleton (mandibles and teeth; thoracic, lumbar (at least 5), sacral, and caudal (at least 12) vertebrae; ribs, sternal elements (including manubrium and xiphisternum), s), and it is a 3D body fossil. Its type locality is Playa Media Luna, Lutetian, which is in a Lutetian marine horizon in the Paracas Formation of Peru. It is the type species of Peregocetus.
Synonymy list
| Year | Name and author |
|---|---|
| 2019 | Peregocetus pacificus Lambert et al. p. 1 figs. Figure 1 |
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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.
†Peregocetus pacificus Lambert et al. 2019
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. Lambert et al. 2019 | MUSM 3580 is a member of the paraphyletic group Protocetidae due to molars with identifiable trigonid (formed by protoconid) and talonid (formed by hypoconid), accessory denticles absent on cheek teeth; fewer than four fused sacral vertebrae; radius not transversely flattened; articulation of innominate with sacrum present; functional hind limbs, with femur only 18% shorter than humerus; and trapezoid and magnum unfused [6, 11–13]. It dif- fers from all other protocetids in the following unique combina- tion of characters: unfused mandibular symphysis, ending just anterior to p3; ratio between height of mandible at coronoid pro- cess and height at anterior margin of p4 nearly equals 2.7; dorsal margin of mandibular condyle at vertical level of posterior margin of alveolus for m3; angular process of the mandible distinctly pointed; only slightly convex ventral margin of the angular pro- cess, preceded anteriorly by step-like notch, at level of m3; markedly ornamented enamel on all teeth; small single-rooted p1; short diastema between p3 and p4 and no diastema between p4 and m1; p4 bearing a large distal cusp; absence of metaconid on lower molars; two fused sacral vertebrae; ilium triangular in lateral view, with an anteriorly projected anteroventral spine; ventromedial expansion of pubis ventral to obturator foramen moderate; and well-defined fovea capitis femoris. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Uhen 2004 | |||||