Long-tailed spiny rat

Long-tailed spiny rat
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Echimyidae
Subfamily: Echimyinae
Tribe: Myocastorini
Genus: Proechimys
Species:
P. longicaudatus
Binomial name
Proechimys longicaudatus
(Rengger, 1830)

The long-tailed spiny rat (Proechimys longicaudatus) is a spiny rat species[2] found in Bolivia, Brazil and Paraguay.

Description

The long-tailed spiny rat is a large rat with a head-and-body length of between 187 and 250 mm (7.4 and 9.8 in) and a tail length of 121 to 200 mm (4.8 to 7.9 in). The fur is less bristly than in other related species. The upper parts are a glossy chestnut colour becoming more orange on the flanks. The underparts are white, and there is a clear line separating upper and lower parts. The tail is chestnut above and pale below.[3] The tails are missing on some individuals,[4] reflecting the lizard-like ability of many echimyids to detach their tails when attacked by predators.

Distribution and habitat

This species has a range in South America extending from southern Bolivia and northern Paraguay to western and central Brazil. It is terrestrial and inhabits dry primary and secondary forest, as well as cerrado and habitats with cleared areas and patches of forest. It usually occurs at altitudes below 500 m (1,600 ft) but has been recorded up to about 1,000 m (3,300 ft).[1]

Ecology

A study was undertaken in Bolivia to establish which small rodents were reservoir hosts for Leishmania, the causal agent for the human disease leishmaniasis. It was found that Oryzomys nitida and Oryzomys acritus were often implicated but that P. longicaudatus did not harbour the infection.[4]

Phylogeny

Morphological characters and mitochondrial cytochrome b DNA sequences showed that P. longicaudatus belongs to the so-called longicaudatus group of Proechimys species, and shares closer phylogenetic affinities with the other members of this clade: P. brevicauda and P. cuvieri.[5][6][7]

Species-level cladogram of the genus Proechimys.
Myocastorini  
  Hoplomys  

  Hoplomys gymnurus

  Proechimys  

  Proechimys canicollis (Colombian spiny rat)

  Proechimys decumanus (Pacific spiny rat)

  Proechimys echinothrix (Stiff-spine spiny rat)

  Proechimys simonsi (Simon's spiny rat)

  group gardneri  
  group semispinosus  
  group guyannensis  
  group longicaudatus  
  group goeldii  
  group trinitatus  
The cladogram has been reconstructed from morphological characters and mitochondrial DNA (cytochrome b) sequences.[5][6][8][7]

Status

The long-tailed spiny rat is a common and adaptable species, being able to tolerate some degree of habitat modification. The dry forests in this part of South America are being cleared for agricultural purposes and it is thought the population trend of this rat is downwards. However, it has a wide range, and a presumed large total population, and the rate of decline is slow, so the International Union for Conservation of Nature has rated its conservation status as being of "least concern".[1]

References

  1. ^ a b c Patton, J.; Bernal, N.; Patterson, B. (2016). "Proechimys longicaudatus". IUCN Red List of Threatened Species. 2016: e.T18289A22207395. doi:10.2305/IUCN.UK.2016-2.RLTS.T18289A22207395.en. Retrieved 12 November 2021.
  2. ^ Woods, C.A.; Kilpatrick, C.W. (2005). "Species Proechimys longicaudatus". 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. 1586. ISBN 978-0-8018-8221-0. OCLC 62265494.
  3. ^ Eisenberg, John F.; Redford, Kent H. (1992). Mammals of the Neotropics, Volume 2: The Southern Cone: Chile, Argentina, Uruguay, Paraguay. University of Chicago Press. p. 388. ISBN 978-0-226-70682-5.
  4. ^ a b Kerr, Sara F.; Emmons, Louise H; Melby, Peter C.; Liu, Chang; Perez, Luis E.; Villegas, Maria; Miranda, Robert (2006). "Leishmania amazonensis infections in Oryzomys acritus and Oryzomys nitida from Bolivia". The American Journal of Tropical Medicine and Hygiene. 75 (6): 1069–1073. doi:10.4269/ajtmh.2006.75.1069. PMID 17172367.
  5. ^ a b Patton, James L. (1987). "Species groups of spiny rats, genus Proechimys (Rodentia: Echimyidae)". Fieldiana: Zoology, Studies in Neotropical Mammalogy: Essays in Honor of Philip Hershkovitz. 39: 305–345. ISSN 0015-0754.
  6. ^ a b Da Silva, Maria Nazareth F. (1998). "Four New species of spiny rats of the genus Proechimys (Rodentia : Echimyidae) from the Western Amazon of Brazil". Proceedings of the Biological Society of Washington. 111: 436–471. ISSN 0006-324X.
  7. ^ a b Patton, James L.; Leite, Rafael N. (2015-03-09). "Genus Proechimys J. A. Allen, 1899". In Patton, James L.; Pardiñas, Ulyses F. J.; D’Elía, Guillermo (eds.). Mammals of South America, Volume 2: Rodents. University of Chicago Press. pp. 975–977. ISBN 978-0-226-16957-6. OCLC 921432000.
  8. ^ Patton, James L.; Da Silva, Maria Nazareth F.; Malcolm, Jay R. (2000-01-01). "Mammals of the Rio Juruá and the evolutionary and ecological diversification of Amazonia". Bulletin of the American Museum of Natural History. 244: 1–306. doi:10.1206/0003-0090(2000)244<0001:MOTRJA>2.0.CO;2. ISSN 0003-0090. S2CID 85577629.

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