San Joaquin pocket mouse
San Joaquin pocket mouse | |
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Conservation status | |
![]() Least Concern (IUCN 3.1)[1] | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Rodentia |
Family: | Heteromyidae |
Genus: | Perognathus |
Species: | P. inornatus |
Binomial name | |
Perognathus inornatus Merriam, 1889 |
The San Joaquin pocket mouse or Salinas pocket mouse (Perognathus inornatus) is a species of rodent in the family Heteromyidae. It is endemic to California in the United States where it lives in desert or semi-desert habitats.
Description
Pocket mice can be distinguished from similar smaller rodents by their externally opening fur-lined cheek pouches. They differ from the kangaroo mice in not having the soles of the feet entirely covered in fur. Kangaroo rats have fur-lined pockets, but they are larger, and have a dark stripe across the hips, and dark stripes on both the top and bottom surfaces of the tail.[2]
The San Joaquin pocket mouse has a total length of about 128 to 160 mm (5.0 to 6.3 in), including a tail of 65 to 78 mm (2.6 to 3.1 in). The tail has a short tuft of hairs at its tip. The fur on the head and body is short and soft, without spines or bristles. The colour is buff, and there is sometimes a pale patch at the base of the small rounded ears. The tail is identically coloured on its upper and lower surfaces.[2]
Distribution
This pocket mouse is endemic to California in the United States. It is found in the Tehachapi Mountains and the lower slopes of the western Sierra Nevada at elevations of up to 600 m (2,000 ft). It also occurs in the upper Sacramento Valley, the San Joaquin Valley, the Salinas Valley, and southwards to the Mojave Desert.[1] It occurs in the "Upper Sonoran life zone", characterized by grassland and semi-desert vegetation, and the "Lower Sonoran life zone", hot desert with creosote bush and Joshua tree.[3]
Ecology
The San Joaquin pocket mouse feeds on seeds of grasses and various plants, carrying them back to its burrow in its cheek pouches.[1] It may also eat soft-bodied invertebrates. It stores seed surplus to its immediate requirements in the chambers inside the burrow for use at times of year when food is scarce. It may become torpid in winter. Breeding takes place between March and July, and there may be two or more litters of four to six young per year.[1]
Status
P. inornatus has a wide range and is common in suitable habitats within that range. It seems to be secure within its range, and no particular threats have been identified except in the north, where agricultural development is destroying and fragmenting its habitat. The International Union for Conservation of Nature has listed its conservation status as being of "least concern".[1]
References
- ^ a b c d e Cassola, F. (2016). "Perognathus inornatus". IUCN Red List of Threatened Species. 2016: e.T42609A22224670. doi:10.2305/IUCN.UK.2016-2.RLTS.T42609A22224670.en. Retrieved 14 November 2021.
- ^ a b Mammals of California and Its Coastal Waters. Stanford University Press. 1954. pp. 195–197. ISBN 978-0-8047-1147-0.
- ^ Ingles, Lloyd Glenn (1947). Mammals of California. Stanford University Press. p. 128. ISBN 978-0-8047-1195-1.
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- Kingdom: Animalia
- Phylum: Chordata
- Class: Mammalia
- Order: Rodentia
- Superfamily: Geomyoidea
- Little desert pocket mouse (Chaetodipus arenarius)
- Narrow-skulled pocket mouse (Chaetodipus artus)
- Bailey's pocket mouse (Chaetodipus baileyi)
- California pocket mouse (Chaetodipus californicus)
- Dalquest's pocket mouse (Chaetodipus dalquesti)
- Chihuahuan pocket mouse (Chaetodipus eremicus)
- San Diego pocket mouse (Chaetodipus fallax)
- Long-tailed pocket mouse (Chaetodipus formosus)
- Goldman's pocket mouse (Chaetodipus goldmani)
- Hispid pocket mouse (Chaetodipus hispidus)
- Rock pocket mouse (Chaetodipus intermedius)
- Lined pocket mouse (Chaetodipus lineatus)
- Nelson's pocket mouse (Chaetodipus nelsoni)
- Desert pocket mouse (Chaetodipus penicillatus)
- Sinaloan pocket mouse (Chaetodipus pernix)
- Baja pocket mouse (Chaetodipus rudinoris)
- Spiny pocket mouse (Chaetodipus spinatus)
- White-eared pocket mouse (Perognathus alticola)
- Arizona pocket mouse(Perognathus amplus)
- Olive-backed pocket mouse (Perognathus fasciatus)
- Plains pocket mouse (Perognathus flavescens)
- Silky pocket mouse (Perognathus flavus)
- San Joaquin pocket mouse (Perognathus inornatus)
- Little pocket mouse (Perognathus longimembris)
- Merriam's pocket mouse (Perognathus merriami)
- Great Basin pocket mouse (Perognathus parvus)