Calassomys apicalis, Pardinas, Lessa, Teta, Salazar-Bravo & Camara, 2014

Don E. Wilson, Russell A. Mittermeier & Thomas E. Lacher, Jr, 2017, Cricetidae, Handbook of the Mammals of the World – Volume 7 Rodents II, Barcelona: Lynx Edicions, pp. 204-535 : 514

publication ID

https://doi.org/ 10.5281/zenodo.6707142

DOI

https://doi.org/10.5281/zenodo.6708633

persistent identifier

https://treatment.plazi.org/id/03F06D13-FF45-208C-0D50-15A30B6BF773

treatment provided by

Carolina

scientific name

Calassomys apicalis
status

 

696. View Plate 30: Cricetidae

Calaca’s White-tailed Mouse

Calassomys apicalis View in CoL

French: Calassomys / German: Diamantina-Weil 3schwanzmaus / Spanish: Raton de cola blanca de Calaga

Taxonomy. Calassomys apicalis Pardinas et al., 2014 View in CoL , “ Brazil, Minas Gerais, Sempre Vivas National Park, 3-25 km by road NW Macacos , Pedreira do Gaio (19°57°50”S, 43°47°18°W, 1251 m asl).” GoogleMaps

Calassomys apicalis is the type species of the genus. Monotypic.

Distribution. Known only from EC Brazil (Sempre Vivas National Park, Minas Gerais State). View Figure

Descriptive notes. Head-body 103-125 mm, tail 149-158 mm, ear 19-21 mm, hindfoot 25-29 mm; weight 29-55 g (mean 38:5 g). Calaca’s White-tailed Mouse is medium-sized, with moderately large ears; numerous and long mystacial vibrissae, the longest surpassing tips of ears when bent backward; and long tail, with entirely white distal tip of 2.5-5 cm and short terminal tuft of hair. Eyes are regularly sized, with conspicuous black eye-ring. There are numerous dark and white mystacial vibrissae. Upper lips are densely covered by white hairs. Ears are rounded, partially naked, covered internally and externally by short and delicate brown hair. Dorsal and ventral colors are subtly delimited with weak countershading. Dorsal fur has dark gray base and ocherous brown or yellowish brown tips; it is long (guard hairs c¢.15 mm) and soft; ventral fur is plumbeous gray, washed with white. Long tail is clearly longer than head-body length and bicolored dorso-ventrally—brown above, white below—except for distal 2.5-5 cm that is white all around, sparse apical tuft present conformed by white hairs of ¢.5-6 mm long. Manus is dorsally covered with short whitish hairs; claws are inconspicuous. Pesis enlarged and narrow; pedal dorsum sparsely covered by entirely whitish hair; plantar surface is naked. Chromosomal complementis 2n = 62, FN = 116.

Habitat. Rocky outcrops within the “campos rupestres,” an open physiognomy that characterizes plateaus and mountaintops in Sempre Vivas National Park, at elevations of 1100-1450 m.

Food and Feeding. Dental morphology of Calaca’s White-tailed Mouse suggests a diet mainly of seeds.

Breeding. No information.

Activity patterns. Little is know, but Calaca’s White-tailed Mouse is nocturnal. Anatomical traits of Calaca’s White-tailed Mouse such as morphology of plantar pads suggests a moderate climbing ability.

Movements, Home range and Social organization. No information.

Status and Conservation. Not assessed on The IUCN Red List. Calaca’s White-tailed Mouse should probably be classified as Data Deficient.

Bibliography. Pardinas & Patton (2015), Pardinas, Lessa et al. (2014).

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Rodentia

Family

Cricetidae

Genus

Calassomys

Loc

Calassomys apicalis

Don E. Wilson, Russell A. Mittermeier & Thomas E. Lacher, Jr 2017
2017
Loc

Calassomys apicalis Pardinas et al., 2014

Pardinas, Lessa, Teta, Salazar-Bravo & Camara 2014
2014
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