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Caatinga vesper mouse

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(Redirected from Calomys expulsus) Species of rodent

Caatinga vesper mouse
Conservation status

Least Concern  (IUCN 3.1)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Cricetidae
Subfamily: Sigmodontinae
Genus: Calomys
Species: C. expulsus
Binomial name
Calomys expulsus
(Lund, 1841)

The caatinga vesper mouse (Calomys expulsus) (also known as the caatinga laucha or rejected vesper mouse) is a rodent species in the family Cricetidae from South America. It is endemic to eastern Brazil, where it is found in open savanna (cerrado) and thorny scrub (caatinga) habitats. Its karyotype has 2n = 66 and FN = 68. It was formerly synonymized with C. callosus, but the latter has 2n = 50 and FN = 66. Karyologic analysis of C. expulsus has shown that the X chromosome is large and submetacentric while the Y chromosome is either acrocentric or submetacentric. Predators include the barn owl . Sexual dimorphism in shape and size occurs; the former is present mainly before the age of 20 days. Males are smaller before age 50 days and larger thereafter, which becomes less prominent after 200 days.

References

  1. ^ Bonvicino, C.R.; Geise, L. (2017) . "Calomys expulsus". IUCN Red List of Threatened Species. 2016: e.T136689A115211375. Retrieved 24 December 2019.
  2. ^ Musser, G. G.; Carleton, M. D. (2005). "Superfamily Muroidea". In Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 1107. ISBN 978-0-8018-8221-0. OCLC 62265494.
  3. Pereira, L. G.; Geise, L. (August 2007). "Karyotype composition of some rodents and marsupials from Chapada Diamantina (Bahia, Brasil)". Brazilian Journal of Biology. 67 (3): 509–518. doi:10.1590/S1519-69842007000300016. ISSN 1519-6984. PMID 18094834.
  4. Magrini, L.; Facure, K. G. (November 2008). "Barn owl (Tyto alba) predation on small mammals and its role in the control of hantavirus natural reservoirs in a periurban area in southeastern Brazil". Brazilian Journal of Biology. 68 (4): 733–740. doi:10.1590/s1519-69842008000400007. PMID 19197490.
  5. Hingst-Zaher, Erika; Marcus, Leslie; Cerqueira, R. (2000-06-25). "Application of geometric morphometrics to the study of postnatal size and shape changes in the skull of Calomys expulsus". Hystrix: The Italian Journal of Mammalogy. 11 (1). doi:10.4404/hystrix-11.1-4139. ISSN 0394-1914.
Taxon identifiers
Calomys expulsus
Mus expulsus

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