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Farangimys
Taxonomy
Farangimys was named by Calede and Socki (2025). Its type is Farangimys megalotrogos.
It was assigned to Geomyoidea by Calede and Socki (2025).
It was assigned to Geomyoidea by Calede and Socki (2025).
Species
F. megalotrogos (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2025 | Farangimys Calede and Socki |
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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.
G. †Farangimys Calede and Socki 2025
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†Farangimys megalotrogos Calede and Socki 2025
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. J. Calede and F. M. Socki 2025 | Substantially larger than all known geo- morphs except for select species in the genera Aurimys, Cratogeomys, Entoptychus, Florentiamys, Geomys, Gregorymys, Orthogeomys, Sanctimus, Schizodontomys and Thomomys. Differs from geomyids by its mental foramen located near the midpoint of the diastema, the absence of a basitemporal fossa, a mediolaterally com- pressed lower incisor, parallel upper toothrows, a more anterior suture of the palatine, a more posterior location of the anterior edge of the premaxillary–maxillary suture, and the absence of both protostylid and hypo- stylid on p4; differs from heliscomyids by the inflation of the mastoid and auditory bulla, position of mental foramen, the presence of a supraorbital bony flange, a P4 larger than molars, anteriorly retracted nasals, a more anterior ascent of the coronoid process, and a more posterior premaxillary–maxillary suture; differs from florentiamyids by anteriorly retracted nasals, absence of protostylid on p4 and inflation of the mastoid and auditory bulla; differs from all florentiamyids except Hitonkala by separated hypostyle and protostyle of M1 and presence of frontal foramen; further differs from Florentiamys and Sanctimus by absence of protostyle on P4, parallel upper toothrows, and position of anterior suture of the palatine; protocone of P4 elongated unlike all florentiamyids except Ecclesimus; P4 larger than molars unlike Ecclesimus, Kirkomys and Hitonkala; dif- fers from mojavemyines by a more anterior ascent of the coronoid process, the absence of a basitemporal fossa, a straight angle of the mandible, a convex and smooth mediolaterally compressed lower incisor, a more posterior premaxillary–maxillary suture, a paracone on P4, a more anterior suture of the palatine, an anterior projection of frontal between premaxilla and jugal, no hypostylid and protostylid on p4, absence of chevrons or enamel reduction, and large metaconid of p4; differs from Mioheteromys, Balantiomys and Proheteromys by circular metaconid of p4 not separated from protoconid and a more posterior premaxillary–maxillary suture; dif- fers from heteromyids by absence of protostylid on p4 and straight angle of the mandible; further differs from Schizodontomys by a smaller lateral inflation of the bulla, the presence of anteromedial bullar processes, a straight angle of the mandible, the absence of proto- stylid and hypostylid on p4, and a circular metaconid of p4; differs from Trogomys by presence of a paracone on P4, absence of protostylid and hypostylid on p4, absence of a separation between protoconid and metaconid on p4, more anterior ascent of the coronoid process, and more posterior premaxillary–maxillary suture; differs from all ‘Harrymyinae’ by more anterior ascent of cor- onoid process, anterior expansion of nasals, and tapered rostrum; differs from Proharrymys by absence of dorsal ridge of masseteric crest, presence of supraorbital bony flange, large metaconid of p4, absence of paracone on P4, P4 larger than molars, parallel upper toothrows, anteriorly retracted posterior end of the nasals, nasals not overlapping orbits, and hypolophid not forming a ‘V’-shape; differs from Tenudomys by inflation of mas- toid and bulla, marked insertion of masseter on dentary, presence of paracone on P4, more posterior premaxil- lary–maxillary suture, more anterior suture of the palat- ine, P4 larger than the molars, elongated protocone of P4; differs from Dikkomys by elongated protocone of P4, mediolaterally compressed lower incisor, P4 larger than molars, parallel upper toothrows, and hypolophid not forming a ‘V’-shape; differs from Harrymys by anterior inflation of auditory bulla, absence of dorsal ridge of masseteric crest, presence of supraorbital bony flange, absence of hypostylid and protostylid on p4, more anterior suture of the palatine, a more posterior location of the anterior edge of the premaxillary–maxillary suture, absence of a protostyle of P4, position of posterior palatine foramina within palatine–maxillary suture, and hypolophid not forming a ‘V’-shape; differs from Lignimus by hypolophid not forming a ‘V’-shape and absence of strong anterior cingulum on p4; differs from Korthomys by higher-crowned teeth and a less complex morphology of the protoloph of P4; differs from Mookomys by asulcate upper incisor, and higher- crowned cheek teeth; differs from Paratrogomys by asulcate upper incisor. |
Measurements
No measurements are available
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| Source: s = species, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Carroll 1988, Nowak 1999, Ji et al. 2002, Calede and Socki 2025, Hendy et al. 2009 | |||||
Age range: Hemingfordian or 18.50000 to 16.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Hemingfordian | USA (Colorado) | F. megalotrogos (239507) |