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Kirkomys
Taxonomy
Kirkomys was named by Wahlert (1984). It is not extant.
It was assigned to Florentiamyidae by Wahlert (1984), McKenna and Bell (1997), Korth and Branciforte (2007), Korth (2014) and Korth et al. (2022).
It was assigned to Florentiamyidae by Wahlert (1984), McKenna and Bell (1997), Korth and Branciforte (2007), Korth (2014) and Korth et al. (2022).
Synonymy list
Year | Name and author |
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1984 | Kirkomys Wahlert |
1997 | Kirkomys McKenna and Bell |
2007 | Kirkomys Korth and Branciforte p. 186 |
2014 | Kirkomys Korth p. 386 |
2022 | Kirkomys Korth 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.
G. †Kirkomys Wahlert 1984
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†Kirkomys martintau Korth 2008
†Kirkomys miriamae Korth et al. 2022
Diagnosis
Reference | Diagnosis | |
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W. W. Korth and C. Branciforte 2007 | Skull features distinct from other florentiamyines (from Wahlert 1984): no flange on frontals above orbits; posterior palatine, dorsal palatine, optic and sphenopalatine foramina more anteriorly placed; incisive foramen smaller (length approximately 12% total length of upper diastema). Dental features: cheek teeth submesodont, similar in crown height to Proheteromys but cusps more bunodont; premolars sim- ple; P4 with simple protoloph (consisting of circular protocone and occasional minute cuspules); P4 consists of four main, subequal cusps (no protoconid) with occa- sional minute accessory cuspules; transverse valley of molars relatively shallow, lophs uniting centrally after only moderate wear; lingual cingulum on upper molars continuous (not interrupted by transverse valley). |
Measurements
No measurements are available
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Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
References: Nowak 1999, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009, Carroll 1988 |
Age range: base of the Late/Upper Chadronian to the top of the early Late Arikareean or 37.20000 to 18.50000 Ma
Collections (9 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Late/Upper Chadronian - Orellan | USA (Nebraska) | K. miriamae (230806) | |
Whitneyan | USA (South Dakota) | K. martintau (170168) Proheteromys nebraskensis (17336 17337 17338) | |
Whitneyan | USA (Nebraska) | K. milleri (17323) Proheteromys nebraskensis (17393) | |
early Early Arikareean | USA (Nebraska) | Proheteromys nebraskensis (156729) | |
early Early Arikareean - early Late Arikareean | USA (California) | K. sp. (175251) |