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Sphaeronycteris toxophyllum
visored bat


By Jordan Zylstra

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Mammalia
Order: Chiroptera
Family: Phyllostomidae
Genus: Sphaeronycteris
Species: Sphaeronycteris toxophyllum

Geographic Range

Columbia, Venezuala, to the Amazonian region of Peru and Brazil (Nowak, 1997; Murcielagos, 1982).

Biogeographic Regions
neotropical (Native )

Habitat

Range elevation
2240 (high) m
(7349.08 (high) ft)

Venezualan specimens were collected in many different habitats, but mostly in moist, open areas of the forest (Nowak, 1997). One specimen was found in cavity in the ground (Murcielagos, 1982). Venezuelan samples were taken at up to 2240 m (Eisenberg, 1989).

Habitat Regions
tropical

Terrestrial Biomes
forest ; rainforest

Physical Description

Average mass
17 g
(0.60 oz)

Range length
56 to 58 mm
(2.20 to 2.28 in)

Sphaeronycteris toxophyllum has a total length of approximately 56-58 mm and a forearm length of about 40 mm. There is no external tail and the dorsum is cinnamon brown. The underparts are brownish white with individual hairs on the back whitish. The side of the face has fleshy outgrowths. A hornlike growth on the nose is larger on males than on females. Under the chin is a fold of skin that can be rolled over the face. The bat is similar in appearance to Centurio but with less extreme facial outgrowths and a third lower molar (Nowak, 1997).

Other Physical Features
endothermic ; bilateral symmetry

Behavior

There is no literature regarding the behavior of this species.

Food Habits

Unknown food habits, but the stomach contents of an examined specimen resembled yellowish fruit pulp (Murcielagos, 1982).

Primary Diet
herbivore (Frugivore )

Ecosystem Roles

Not much is known, but because they are frugivores it might be assumed that they disperse some fruit seeds.

Ecosystem Impact
disperses seeds

Economic Importance for Humans: Positive

None known

Economic Importance for Humans: Negative

None known

Conservation Status

IUCN Red List of Threatened Species [Link]
Data Deficient
More Information

US Federal List [Link]
No special status

CITES [Link]
No special status

S. toxophyllum is not listed on either the IUCN or U.S. ESA sites.

Other Comments

This species has not been widely seen nor studied so there is very little literature on it.

For More Information

Find Sphaeronycteris toxophyllum information at

Contributors

Jordan Zylstra (author), University of Michigan, Ondrej Podlaha (editor), University of Michigan.

References

"CITES" (On-line). Accessed November 19, 2001 at http://www.cites.org/eng/resources/fauna.shtml.

1982. "Murcielagos De Venezuela II: Phyllostomidae-Stenodermatinae" (On-line). Accessed 8 October, 2001 at http://www.redpav-fpolar.info.ve/fagro/v12_34/v124m009.html.

Eisenberg, J. 1989. Mammals of the Neotropics. Chicago: University of Chicago Press.

Nowak, R. 1997. "Walker's Mammals of the World Online 5.1" (On-line). Accessed 8 October, 2001 at http://www.press.jhu.edu/books/walkers_mammals_of_the_world/chiroptera/chiroptera.phyllostomidae.sphaeronycteris.html.

To cite this page: Zylstra, J. 2002. "Sphaeronycteris toxophyllum" (On-line), Animal Diversity Web. Accessed June 01, 2012 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Sphaeronycteris_toxophyllum.html

Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.

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