Misplaced Pages

Michoacan pocket gopher
Conservation status
Endangered  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Geomyidae
Genus:	Zygogeomys Merriam, 1895
Species:	Z. trichopus
Binomial name
Zygogeomys trichopus Merriam, 1895

The Michoacan pocket gopher (Zygogeomys trichopus) is a species of rodent in the family Geomyidae. It is monotypic within the genus Zygogeomys. It is endemic to Mexico where its natural habitat is temperate, high-altitude forests. Its numbers are declining and it is listed by the IUCN as "endangered".

Description

The Michoacan pocket gopher is a small animal with short, dense, black, lustrous fur and a hairless tail. The eyes are small and deep-set and there is a pad-like region of bare skin just behind the nostrils. It is docile when caught, making no attempt to bite as do other pocket gophers.

Distribution and habitat

The Michoacan pocket gopher is endemic to the Trans-Mexican Volcanic Belt mountain range in central southern Mexico, where it occurs in four discrete locations near west of Lake Pátzcuaro at altitudes over 2,200 metres (7,200 ft). The fossil record shows that members of the genus Zygogeomys, including two other now extinct species, were widespread in the late Pliocene epoch in the southwestern United States. Its typical habitat is mixed forests of spruce, pine, and alder with deep friable soil suitable for burrowing. A number of small populations separated by unsuitable terrain exist. The species shows little genetic variation and the present population may be a relict of a previous, more widespread distribution.

Natural history

The Michoacan pocket gopher lives in a burrow and throws up a characteristic, cone-shaped mound of soil on the surface with no visible entrance. A central chamber has been found 2 m (6 ft 7 in) underground and may be where the young are raised. Little is known of the animal's breeding habits, which may be seasonal, as males caught in March and August had small testes while one caught in December had large ones. A pregnant female containing one embryo has been caught in December. This animal is seldom caught in surface traps and it may live and forage almost entirely underground.

In its natural habitat of Michoacán, the pocket gopher has been reported to cause damage to avocado trees and mutilate young trees in reforestation projects, as well as wreak structural damage on roads, building sites, and irrigation canals.

Status

The habitat requirements of the Michoacan pocket gopher are very specific, and where agriculture replaces the native woodland in which it lives, it is restricted to higher altitudes and tends to be replaced by other species of pocket gopher (Pappogeomys). Its total area of occurrence is less than 5,000 km (1,900 sq mi), its range is fragmented, and its population is declining, and the IUCN has listed it as "endangered".

References

1. ^ Álvarez-Castañeda, S.T.; Lacher, T.; Vázquez, E.; Arroyo-Cabrales, J. (2018). "Zygogeomys trichopus". IUCN Red List of Threatened Species. 2018: e.T23323A22216603. doi:10.2305/IUCN.UK.2018-1.RLTS.T23323A22216603.en. Retrieved 17 November 2021.
2. 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. 870. ISBN 978-0-8018-8221-0. OCLC 62265494.
3. ^ Hafner, Mark S.; Barkley, Linda J. (1984). "Genetics and Natural History of a Relictual Pocket Gopher, Zygogeomys (Rodentia: Geomyidae)". Journal of Mammalogy. 65 (3): 474–479. doi:10.2307/1381094. JSTOR 1381094.
4. ^ Hafner, Mark S.; Hafner, John C. (1982). "Structure of Surface Mounds of Zygogeomys (Rodentia: Geomyidae)". Journal of Mammalogy. 63 (3): 536–538. doi:10.2307/1380465. JSTOR 1380465.
5. Whisson, Desley (1994). "The Pocket Gopher as a Pest in Mexico". Proceedings – Vertebrate Pest Conference. 16. University of Wisconsin at Madison: 151.
6. Mares, Michael A.; Schmidly, David J. (1991). Latin American Mammalogy: History, Biodiversity, and Conservation. University of Oklahoma Press. p. 182. ISBN 0806123435.

v t e Castorimorpha
Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Rodentia
Castorimorpha Diplolophidae †Diplolophus †Floresomys †Griphomys †Jimomys †Meliakrouniomys †Schizodontomys †Texomys Castoroidea Castoridae †Migmacastor †Agnotocastorinae †Agnotocastorini Agnotocastor Neatocastor †Anchitheriomyini Anchitheriomys Oligotheriomys Propalaeocastor †Palaeocastorinae Capacikala Palaeocastor Pseudopalaeocastor †Euhapsini Euhapsis Fossorcastor †Castoroidinae Priusaulax †Castoroidini Castoroides Dipoides Monosaulax Procastoroides Prodipoides †Nothodipoidini Eucastor Microdipoides Nothodipoides †Trogontheriini Asiacastor Boreofiber Euroxenomys Trogontherium Youngofiber Castorinae Castor †Chalicomys †Hystricops †Romanofiber †Schreuderia †Sinocastor †Steneofiber †Zamolxifiber †Eutypomyidae Eutypomys Janimus Mattimys Microeutypomys †Rhizospalacidae Rhizospalax
Geomorpha †Eomyidae Simiacritomys Symplokeomys †Apeomyinae Apeomyoides Apeomys Arikareeomys Megapeomys Zophoapheomys †Eomyinae Adjidaumo Aguafriamys Asianeomys Aulolithomys Centimanomys Comancheomys Cristadjidaumo Cupressimus Eomyodon Eomyops Eomys Estramomys Japaneomys Kansasimys Keramidomys Leptodontomys Ligerimys Metadjidaumo Metanoiamys Meteomys Montanamus Namatomys Neoadjidaumo Orelladjidaumo Paradjidaumo Paranamatomys Pentabuneomys Protadjidaumo Pseudotheridomys Rhodanomys Ritteneria Ronquillomys Viejadjidaumo †Yoderimyinae Litoyoderimys Yoderimys Zaisaneomys Zemiodontomys Geomyoidea †Griphomys †Meliakrouniomys †Florentiamyidae Ecclesimus Fanimus Florentiamys Hitonkala Kirkomys Sanctimus †Heliscomyidae Apletotomeus Heliscomys Passaliscomys Tylionomys Heteromyidae Dipodomyinae †Aurimys Dipodomys Microdipodops Heteromyinae †Diprionomys Heteromys †Metaliomys Perognathinae Chaetodipus Perognathus Geomyidae †Entoptychinae Entoptychus Gregorymys Pleurolicus Ziamys Geomyinae Cratogeomys Geomys Heterogeomys Orthogeomys Pappogeomys Thomomys Zygogeomys

• IUCN Red List endangered species
• Pocket gophers
• Endemic mammals of Mexico
• Natural history of Michoacán
• Rodents of North America
• Fauna of the Trans-Mexican Volcanic Belt
• Endangered animals
• Endangered biota of Mexico
• Endangered fauna of North America
• Taxa named by Clinton Hart Merriam
• Mammals described in 1895