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Holochilus primigenus
Taxonomy
Holochilus primigenus was named by Steppan (1996). Its type specimen is FMNH PM 56940, a mandible (Right mandible with incisor M1-3), and it is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Holochilus primigenus Steppan |
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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.
†Holochilus primigenus Steppan 1996
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. J. Steppan 1996 | Large rat of the sigmodontine tribe Oryzomyini (sensu Voss and Carleton, 1993) with lophate, sigmodont molars; distinguished from living species of Holochilus by labial and lingual folds overlapping but not deeply interpenetrating, cusps not alternate, very small mesolophs and short but distinct mesoflexus on unworn Ml and M2, protoflexus M2, mesoloph of M3 vestigial, M3 shorter and narrower than M2, small, bud-like mesolophids on unworn ml and m2, entolophid on m3, and smaller tooth size; from Lundomys by labial root of Ml, present smaller tooth size, robust mandible with steeply-angled coronoid process, incisive foramen not extending well between Mis, and mesopterygoid fossa extending nearly to M3 posterior alveolus; from Sigmodon, Prosigmodon, and the phyllotine "sigmodonts" by large enameled pit in anteroconid of ml and small, bud-like, but distinct, mesolophs and mesolophids on all upper and lower molars |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1999, Lillegraven 1979, Carroll 1988, Ji et al. 2002, Hendy et al. 2009 | |||||