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Aztec mastiff bat
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Chiroptera
Family:	Molossidae
Genus:	Molossus
Species:	M. aztecus
Binomial name
	Molossus aztecus; Saussure, 1860
	Aztec mastiff bat range
Synonyms
	Dysopes aztecus Saussure, 1860 ; Molossus molossus aztecus Saussure, 1860;

The Aztec mastiff bat (Molossus aztecus) is a species of bat in the family Molossidae.^[2] It is insectivorous.^[1]

Taxonomy and etymology

It was described as a new species in 1860 by Swiss scientist Henri Saussure.^[3] Its species name "aztecus" refers to the indigenous Aztecs of Mexico, where this species was first documented.

Description

It is one of the smallest bats of the genus Molossus. Its fur is chocolate brown and its patagia, nose, and ears are very dark brown. Individuals weigh 12–16 g (0.42–0.56 oz). Its forearm length is 34–35 mm (1.3–1.4 in). Its dental formula is 1.1.1.31.1.2.3 for a total of 26 teeth.^[4]

Biology and ecology

It is nocturnal, foraging for its insect prey at night and roosting in hollow trees during the day. Unusually for its genus, females may become pregnant while still nursing a pup.^[4]

Range and habitat

It is found from Jalisco and Cozumel Island in southern Mexico to Nicaragua and has been reported from Guatemala but not from El Salvador or Honduras. It has also been reported from southern Venezuela.^[1] It is endemic to Mexico. It inhabits a variety of forest habitats at elevations from near sea level to 1,300 metres (4,300 ft).^[1] It is generally documented at elevations greater than 1,500 m (4,900 ft) above sea level.^[4]