PBDB Taxon

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Bensonomys

Mammalia - Rodentia - Cricetidae

Taxonomy

Bensonomys was named by Gazin (1942).

It was reranked as Calomys (Bensonomys) by Baskin (1978), Dalquest (1980), Baskin (1986), Czaplewski (1987), Carranza-Castañeda and Walton (1992) and Korth (1994).

It was assigned to Cricetinae by Kurten and Anderson (1980); to Calomys by Baskin (1978), Dalquest (1980), Baskin (1986), Czaplewski (1987), Carranza-Castañeda and Walton (1992) and Korth (1994); to Sigmodontinae by Kelly (2007); and to Cricetidae by Gazin (1942) and Lindsay and Czaplewski (2011).

Species

B. coffeyi, B. hershkovitzi, B. lindsayi, Calomys (Bensonomys) arizonae, Calomys (Bensonomys) baskini, Calomys (Bensonomys) elachys, Calomys (Bensonomys) eliasi, Calomys (Bensonomys) gidleyi, Calomys (Bensonomys) meadensis, Calomys (Bensonomys) stirtoni, Calomys (Bensonomys) winklerorum, Calomys (Bensonomys) yazhi, Oryzomys pliocaenicus

Synonyms

Oryzomys pliocaenicus was named by Hibbard (1939). It is not extant. Its type specimen is Museum of Comparative Zoology, Harvard, No. 6202, a mandible (Left lower mandible with incisor, m1, m2 and m3. ). Its type locality is Edson, which is in a Hemphillian terrestrial horizon in Kansas.

It was considered a nomen dubium by Baskin (1986).

Synonymy list

Year	Name and author
1939	Oryzomys pliocaenicus Hibbard figs. Fig. 6
1942	Bensonomys Gazin p. 489
1978	Calomys (Bensonomys) Baskin p. 126
1980	Calomys (Bensonomys) Dalquest
1980	Bensonomys Kurten and Anderson p. 248
1980	Bensonomys Reig
1986	Calomys (Bensonomys) Baskin
1987	Calomys (Bensonomys) Czaplewski
1992	Calomys (Bensonomys) Carranza-Castañeda and Walton p. 74
1994	Calomys (Bensonomys) Korth
2002	Bensonomys Martin et al.
2007	Bensonomys Kelly p. 126
2011	Bensonomys Lindsay and Czaplewski

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes

Rank	Name	Author
class	Mammalia
—	Theriamorpha	(Rowe 1993)
—	Theriiformes	()
—	Trechnotheria
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Euarchontoglires	Murphy et al. 2001
—	Gliriformes	Wyss and Meng 1996
—	Glires	()
—	Simplicidentata	()
order	Rodentia	Bowdich 1821
infraorder	Myodonta	Schaub 1958
superfamily	Muroidea	Illiger 1811
—	Eumuroida
family	Cricetidae	Fischer von Waldheim 1817
genus	Bensonomys

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. †Bensonomys Gazin 1942

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†Bensonomys coffeyi Dalquest 1983

†Bensonomys hershkovitzi Martin et al. 2002

†Bensonomys lindsayi Kelly 2007

†Calomys (Bensonomys) arizonae Gidley 1922

†Calomys (Bensonomys) baskini Lindsay and Jacobs 1985

†Calomys (Bensonomys) elachys Lindsay and Jacobs 1985

†Calomys (Bensonomys) eliasi Hibbard 1937

†Calomys (Bensonomys) gidleyi Baskin 1978

†Calomys (Bensonomys) meadensis Hibbard 1956

†Calomys (Bensonomys) stirtoni Hibbard 1953

†Calomys (Bensonomys) winklerorum Carranza-Castañeda and Walton 1992

†Calomys (Bensonomys) yazhi Baskin 1978

Invalid names: Oryzomys pliocaenicus Hibbard 1939 [nomen dubium]

Diagnosis

Reference	Diagnosis
C. L. Gazin 1942	Generic characters.-Near Eligmodontia with knoblike process at anterior extremity of masseteric crest on lower jaw, last lower cheek tooth reduced, and sulcus between capsular and coronoid processes. Removed from Eligmodontia in having deeper lower jaw, dorsa11y placed mental foramen closer to process at extremity of masseteric crest, more brachydont cheek teeth, notch on anterior lobe of first lower chook tooth better developed, lower incisor more procumbent. Genotype - Eligmodontia arizonae Gidley.