Micronycteris sanborni Simmons 1996
Creators: name: Wilson, Don E.
name: Mittermeier, Russell A.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Micronycteris
Micronycteris sanborni

description: 5. Sanborn’s Big-eared Bat <i>Micronycteris sanborni</i> <b>French:</b> Micronyctére de Sanborn / <b>German:</b> Sanborn-GroRohrblattnase / <b>Spanish:</b> Micronicterio de Sanborn <b>Taxonomy.</b> Micronycteris sanborni Simmons, 1996, “Sitio Luanda, Itaitera, 4 km S of Crato,” Ceari, Brazil, Former records of M. sanborni from eastern Bolivia now represent a new species, M. yatesi. Monotypic. <b>Distribution.</b> NE &amp; E Brazil (Maranhao, Piaui, Ceara, Paraiba, Pernambuco, Alagoas, Sergipe, Tocantins, Bahia, and Minas Gerais). <b>Descriptive notes.</b> Head-body 37-49 mm, tail 11-1-14-8 mm, ear 19-21 mm, hindfoot 8-9 mm, forearm 31:8-37 mm; weight 5-8 g. Dorsal fur of Sanborn’s Big-eared Bat is brown. Venter is pure white, extending onto throat and chin. Individual hairs of dorsum are bicolored, with large white bases that make up more than one-half the hair length, followed by brown tips. Rostrum and lips are relatively less hairy that brown head. Pair of dermal pads is arranged in V-shaped pattern on chin. Ears are round and large, united by deeply notched band ofskin. Noseleafis pale brown, with base of horseshoe free and delimited by thick ridge. Wing membranes and uropatagium are blackish. Uropatagium is relatively long and naked. Calcar is similar in size to foot. Tail perforates uropatagium dorsally. Skull has short rostrum, less than one-half the length of braincase. Lateral profile of skull is less concave than in the Tiny Big-eared Bat (M. minuta). Palate is relatively short and broad and V-shaped posteriorly. Mandibular condyle is placed above tooth row and has well-developed angular process. P? is much smaller than P*, M' and M? are dilambdodont, and P,is much smaller than P, and P.. Chromosomal complement has 2n = 28 and FN = 50, with five pairs of metacentric, seven submetacentric, and small pair of telocentric autosomes and submetacentric X-chromosome. Y-chromosome is unknown. <b>Habitat.</b> Xeric habitats of cerrado and caatinga with dense vegetation. Sanborn’s Bigeared Bats have been captured in shrubby vegetation (3-8 m high) near rocky outcrops or water bodies and in mesic enclaves of caatinga, such as canyons, with tall trees (12-17 m high). They are also recorded near cultivated areas within caatinga. <b>Food and Feeding.</b> Sanborn’s Big-eared Batis insectivorous. One captive individual ate katydids (Orthoptera) and moths (Lepidoptera). <b>Breeding.</b> Reproductive data suggest that Sanborn’s Big-eared Bat is monoestrous and has one young per year. Females give birth in mid-late rainy season when insects are abundant and wean their young at beginning of dry season. <b>Activity patterns.</b> In Ceara (north-eastern Brazil), at least three Sanborn’s Big-eared Bats were found in a crevice on the wall of a sugarcane mill. In Minas Gerais (southeastern Brazil), six individuals were captured with mist nets set on a limestone outcrop. <b>Movements, Home range and Social organization.</b> No information. <b>Status and Conservation.</b> Classified as Least Concern on The IUCN Red List. When the last Red List assessment was made, Sanborn’s Big-eared Bat was known from only three localities. Recent studies have expanded its known distribution considerably but confirm thatit is restricted to caatinga and cerrado, one of the most endangered and less protected areas of Brazil. <b>Bibliography.</b> Feijo, Rocha &amp; Ferrari (2015), Nogueira et al. (2015), Simmons (1996).
description: Published as part of <i>Don E. Wilson &amp; Russell A. Mittermeier, 2019, Phyllostomidae, pp. 444-583 in Handbook of the Mammals of the World – Volume 9 Bats, Barcelona :Lynx Edicions</i> on page 491, DOI: 10.5281/zenodo.6458594