Pittier's crab-eating rat

Pittier's crab-eating rat
Conservation status
	; Near Threatened (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Cricetidae
Subfamily:	Sigmodontinae
Genus:	Ichthyomys
Species:	I. pittieri
Binomial name
	Ichthyomys pittieri; Handley & Mondolfi, 1963

Pittier's crab-eating rat (Ichthyomys pittieri) is a species of semiaquatic rodent in the family Cricetidae.[2] It is endemic to Venezuela. The natural habitats of this species are rivers and swamps. Its karyotype has 2n = 92 and FNa = 98. This was previously thought to be the highest chromosome number known for a mammal,[3] but it has since been found that the plains viscacha rat or red viscacha rat (Tympanoctomys barrerae) has 4x = 2n = 102.[4]

References

Roach, N., Naylor, L. & McCay, S. 2019. Ichthyomys pittieri. The IUCN Red List of Threatened Species 2019: e.T10762A22384567. Downloaded on 19 July 2019.
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. 1120. ISBN 978-0-8018-8221-0. OCLC 62265494.
Schmid, M.; Fernández-Badillo, A.; Feichtinger, W.; Steinlein, C.; Roman, J. I. (1988). "On the highest chromosome number in mammals". Cytogenetic and Genome Research. 49 (4): 305–8. doi:10.1159/000132683. PMID 3073914.
Contreras LC, Torres-Mura JC, Spotorno AE (1990). "The largest known chromosome number for a mammal, in a South American desert rodent". Experientia. 46 (5): 506–508. doi:10.1007/BF01954248. PMID 2347403.

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[iucn-1] Roach, N., Naylor, L. & McCay, S. 2019. Ichthyomys pittieri. The IUCN Red List of Threatened Species 2019: e.T10762A22384567. Downloaded on 19 July 2019.

[MSW3-2] 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. 1120. ISBN 978-0-8018-8221-0. OCLC 62265494.

[3] Schmid, M.; Fernández-Badillo, A.; Feichtinger, W.; Steinlein, C.; Roman, J. I. (1988). "On the highest chromosome number in mammals". Cytogenetic and Genome Research. 49 (4): 305–8. doi:10.1159/000132683. PMID 3073914.

[Contreras-4] Contreras LC, Torres-Mura JC, Spotorno AE (1990). "The largest known chromosome number for a mammal, in a South American desert rodent". Experientia. 46 (5): 506–508. doi:10.1007/BF01954248. PMID 2347403.