Histiotus humboldti, Handley, 1996
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https://doi.org/ 10.5281/zenodo.6397752 |
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https://doi.org/10.5281/zenodo.6580598 |
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persistent identifier |
https://treatment.plazi.org/id/4C3D87E8-FFA8-6A17-FF82-97F51D16BCEF |
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Conny |
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Histiotus humboldti |
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170. View Plate 62: Vespertilionidae
Humboldt’s Big-eared Brown Bat
Histiotus humboldti View in CoL
French: Sérotine de Humboldt / German: Humboldt-GroRohrfledermaus / Spanish: Histiotus de Humboldt
Taxonomy. Histiotus humboldti Handley, 1996 View in CoL ,
“Los Venados, 4 km NNW Caracas, 10°32’N, 66°54'W, 1498 m, Distrito Federal, Venezuela.” GoogleMaps
Histiotus is phylogenetically nested within Eptesicus closely related to the New World species and some authors have included Histiotus as a subgenus of Eptesicus . Histiotus 1s recognized here as a distinct genus because of its distinct morphology, however, leaving Eptesicus paraphyletic, which may result in the splitting of Eptesicus into multiple genera. Venezuelan specimens previously reported as “ Histiotus sp. A ” by C. O. Handley, Jr. in 1976 and “ Histiotus sp. ” by A. L. Gardner in 1990 correspond to H. humboldti . It has a disjunct distribution that is probably related to a relictual wider distribution. Monotypic.
Distribution. N, W & S Venezuela, NC & SW Colombia, and C Ecuador. View Figure
Descriptive notes. Head-body ¢.54-59 mm, tail 47-56 mm, ear 28-32 mm, hindfoot 8-11 mm, forearm 44-49 mm; weight 9-12 g. Dorsal hairs are bicolored, with blackish bases and bright tan to brown tips; ventral hairs have fuscous bases and buff tips. Ears are very large; anterior lobe is wide, forming point at its fold; tragus is relatively short and broad. Skull is fragile; braincase and postorbital constriction region are notably inflated; rostrum is short, narrow, and shallow; zygomatic arches have strongly developed postorbital process; facial profile is sharply dished; and pterygoid processes are thin and delicate. Teeth are small and delicate, with low cusps; lower molar tooth row is relatively short. Dental formula for all species of Histiotusis12/3,C1/1,P1/2,M 3/3 (x2) = 32.
Habitat. Montane regions below cloud forests and paramos and lower montane humid forests, secondary growth moist evergreen forests, scrubby tepuyan vegetation in open areas, sub-Andean woodlands, and eucalypt plantations at elevations of 1500-3000 m.
Food and Feeding. Humboldt’s Big-eared Brown Bat is insectivorous.
Breeding. Pregnant Humboldt’s Big-eared Brown Bats were captured between late January and early February in Colombia.
Activity patterns. No information.
Movements, Home range and Social organization. No information.
Status and Conservation. Classified as Data Deficient on The IUCN Red List. Humboldt’s Big-eared Brown Bat is uncommon to rare in its fragmented distribution.
Bibliography. Gardner (1990), Handley (1976, 1996), Handley & Gardner (2008), Rodriguez-Posada (2010), Romero (2018b), Simmons (2005), Velazco & Aguirre (2016b).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Histiotus humboldti
| Don E. Wilson & Russell A. Mittermeier 2019 |
Histiotus humboldti
| Handley 1996 |