Phyllostomidae Author Don E. Wilson Author Russell A. Mittermeier text 2019 2019-10-31 Lynx Edicions Barcelona Handbook of the Mammals of the World – Volume 9 Bats 444 583 book chapter http://doi.org/10.5281/zenodo.6458594 adeeb71f-7f8d-4e00-bc9f-35089363f76e 978-84-16728-19-0 6458594 9. Brosset’s Big-eared Bat Micronycteris brosseti French: Micronyctere de Brosset / German: Brosset-GroRohrblattnase / Spanish: Micronicterio de Brosset Taxonomy. Micronycteris brosseti Simmons & Voss, 1998 , “Paracou,” French Guiana . Micronycteris brosseti was eventually associated with the gray-bellied group (M. giovanniae , M. matses , M. megalotis , M. macrotis , and M. buriri ). Monotypic. Distribution. Known only from NE Peru ( Loreto Department), Guyana , French Guiana; one possible record in SE Brazil ( Sao Paulo ). It is expected to occur throughout Amazonia and Brazilian Atlantic Forest. Descriptive notes. Head-body 51-61 mm, tail 10-14 mm, ear 18-20 mm, hindfoot 10-11 mm, forearm 31-5-34 mm; weight 4-3-5 g. Brosset’s Big-eared Bat is one ofthe smaller species of Micronycteris . Venter is pale gray to pale buff, being paler than dark brown dorsum. Dorsal hair is bicolored, with white bases (one-third to one-half of each hair). Short dense fur occurs on lower one-third of medial side of pinna (less than or equal to 4 mm ). First phalanx of fourth digit is longer than second. Calcar is longer than foot, and tibia shorter than 14-5 mm. Habitat. Well-drained primary forests. Food and Feeding. Brosset’s Big-eared Bat presumably is mainly insectivorous and occasionally eats fruits. Breeding. Adult male Brosset’s Big-eared Bats and non-pregnant females have been caught in French Guiana in August and March. Activity patterns. Brosset’s Big-eared Bats are crepuscular. Individuals were captured when they emerged from a hollow tree between 18:45 h and 19:15 h. They occur in hollow trees and have been caught in ground-level mist nets. Movements, Home range and Social organization. There is a record of a colony ofat least four male and three female Brosset’s Big-eared Bats in a single roost in a hollow tree with only one entrance 1 m aboveground. Status and Conservation. Classified as Data Deficient on The IUCN Red List. Brosset’s Big-eared Bat is rare, known only from ten specimens. Natural history and current population trends are unknown. Deforestation could be a conservation threat. Bibliography. Charles-Dominique et al. (2001), Garbino (2016), Lim, B.K. et al. (1999), Nogueira, Peracchi & Moratelli (2007), Paglia et al. (2012), Reis et al. (2017), Simmons & Voss (1998), Williams & Genoways (2008).