Geomys personatus
Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Sphenacodontia
Cladus: Sphenacodontoidea
Cladus: Therapsida
Cladus: Theriodontia
Cladus: Cynodontia
Cladus: Eucynodontia
Cladus: Probainognathia
Cladus: Prozostrodontia
Cladus: Mammaliaformes
Classis: Mammalia
Subclassis: Trechnotheria
Infraclassis: Zatheria
Supercohors: Theria
Cohors: Eutheria
Infraclassis: Placentalia
Cladus: Boreoeutheria
Superordo: Euarchontoglires
Ordo: Rodentiaa
Subordo: Castorimorpha
Familia: Geomyidae
Genus: Geomys
Species: Geomys personatus
Subspecies: G. p. davisi – G. p. fallax – G. p. fuscus – G. p. maritimus – G. p. megapotamus – G. p. personatus – G. p. streckeri
Name
Geomys personatus True, 1889
References
Geomys personatus in Mammal Species of the World.
Wilson, Don E. & Reeder, DeeAnn M. (Editors) 2005. Mammal Species of the World – A Taxonomic and Geographic Reference. Third edition. ISBN 0-8018-8221-4.
IUCN: Geomys personatus True, 1889 (Least Concern)
Links
North American Mammals: Geomys personatus [1]
Vernacular names
čeština: Pytlonoš texaský
English: Texas Pocket Gopher
The Texas pocket gopher (Geomys personatus) is a species of rodent in the family Geomyidae.[2] It is found in Tamaulipas in Mexico and in Texas in the United States.[1]
Description
Males grow to a length of about 32 cm (12.6 in) including a tail of about 11 cm (4.3 in). Females are slightly smaller and both sexes weigh about 400 grams (14 oz). The dorsal surface is a dull greyish-brown and the ventral surface is whitish with darker patches. There is very little hair on the tail especially near the tip. The upper incisors have a pair of grooves.[3]
Distribution
The Texas pocket gopher is found in southern Texas as far north as Val Verde County and San Patricio County,[3] and the state of Tamaulipas, the most north-easterly part of Mexico.[1] Its range is patchy and disjointed, similarly to other Geomys species. It is common in the sand drifts on Mustang and Padre islands in the Gulf of Mexico.[3] The population around Maverick County, Zavala County, and Dimmit County was recently recognized as a distinct species, Strecker's pocket gopher. [1][4]
Behavior
A single Texas pocket gopher occupies a burrow system that may have short side branches and about 30 m (98 ft) of passages. It defends its burrow against intruders, emitting a wheezy call and gnashing its teeth.[3] It mainly stays underground and plugs the surface entrances with soil. [5] The spoil heap of excavated soil can be 50 cm (20 in) across and 12 cm (5 in) high. The Texas pocket gopher feeds on the roots of grasses such as paspalum (Paspalum), Bermuda grass (Cynodon), and sandbur (Cenchrus) and consumes all parts of a composite plant in the sunflower genus Helianthus. It avoids emerging onto the surface of the ground, where it is at risk from predators, by seizing the roots of the plant and pulling it down into its burrow. It also practices coprophagy, eating some of its own fecal pellets: it takes the pellets with its teeth directly from its anus, manipulates them with its fore-feet, and examines them carefully. It then consumes some and rejects others; however, the basis for its choice is unclear.[3]
Little is known about the reproductive behavior of this species but it appears to breed at any time of year. Litters of from one to five young have been recorded and there are believed to be up to two litters in the year.[3]
Status
The Texas pocket gopher has a wide range and is common in at least part of that range, with a patchy distribution attributable to its requirement for loose, sandy soils in which to burrow. The IUCN lists its conservation status as being of "least concern" because, although the population trend is unknown, it is unlikely to be declining at such a rate as to warrant listing it in a more threatened category.[1]
References
Lacher, T. (2016). "Geomys personatus". IUCN Red List of Threatened Species. 2016: e.T9055A22218317. doi:10.2305/IUCN.UK.2016-2.RLTS.T9055A22218317.en. Retrieved 13 November 2021.
Patton, J. L. (2005). "Family Geomyidae". 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. 863. ISBN 978-0-8018-8221-0. OCLC 62265494.
"Texan Pocket Gopher". The Mammals of Texas: Rodents. NSRL: Museum of Texas Tech University. Retrieved 4 July 2014.
Chambers, Ryan R.; Sudman, Jeffrey K.; Bradley, Peggy (2 June 2009). "A Phylogenetic Assessment of Pocket Gophers (Geomys): Evidence from Nuclear and Mitochondrial Genes". Journal of Mammalogy. 90 (3): 537–547. doi:10.1644/08-MAMM-A-180R1.1.
"Geomys personatus: Texas Pocket Gopher". North American Mammals. Smithsonian National Museum of Natural History. Retrieved 4 July 2014.
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