Platyrrhinus dorsalis (Thomas, 1900)

Don E. Wilson & Russell A. Mittermeier, 2019, Phyllostomidae, Handbook of the Mammals of the World – Volume 9 Bats, Barcelona: Lynx Edicions, pp. 444-583 : 566-567

177.

Thomas’s Broad-nosed Bat

Platyrrhinus dorsalis

French: Sténoderme de Thomas / German: Thomas-Breitnasenfledermaus / Spanish: Platirrino de Thomas

Taxonomy. Vampyrops dorsalis Thomas, 1900 ,

“Paramba [Imbabura], N. Ecuador. Ale. 1100 m.”

Based on extensive systematic studies, former taxonomic definition of P. dorsalis included taxa now recognized as valid species: P. aquilus , P. ismaeli , P. masu , and P. umbratus . Its relationship with sister species P. chocoensis is pending additional molecular analyses. Monotypic.

Distribution. Based on its most updated definition, known from Andean slopes of Colombia and Ecuador.

Descriptive notes. Head-body 71-80 mm (tailless), ear 18-20 mm, hindfoot 12-15 mm, forearm 46-50 mm; weight 30-40 g. Thomas’s Broad-nosed Bat is mediumsized, just slightly larger than the Shadowy Broad-nosed Bat ( P. umbratus ). Dorsal fur 1s dark brown, ventral fur 1s brownish, and dorsal and ventral hairs are tricolored, with paler bases. Dorsal hairs are long (7-8 mm). Head is robust, snout is short and broad, and facial strips are pale brownish, with supraocular just a bit brighter than subocular. Dorsal stripe is narrow, pale white but not too bright. Noseleaf is large, spear-shaped, and completely dark fuscous, and lower rim is free. Insertion of posterior edge of plagiopatagium occurs on first metatarsal, and third metacarpal is shorter than fifth. Caudal membrane is very short in middle (3—4 mm), with deep Ushaped groove, and edge has dense fringe of long hairs. Dense and long hair occurs on dorsum offeet. I' converge and are in contact at their tips and much longer than [*. P* has two stylar cusps on its posterior face. M' metastyle is present, and protocone is small and blunt.

Habitat. Very humid lowland forests on Pacific slope, pre-montane and montane humid forests of Andean slopes, and secondary forests and near plantations at elevations of 150-2200 m or above (rarely below 1000 m). Thomas's Broad-nosed Bat has been found roosting in fissures in limestone cliffs and under overhanging roots at the top of a canyon wall.

Food and Feeding. Thomas’s Broad-nosed Bat has been listed as consuming fruits and insects, but this information could include populations now recognized as a different species in Peru or Venezuela.

Breeding. Lactating Thomas’s Broad-nosed Bats were found in March, June-July, and September in Colombia; there are no verifiable records of pregnancy.

Activity patterns. Thomas’s Broad-nosed Bat is nocturnal. Individuals were netted at the mouth of a limestone cave in Colombia.

Movements, Home range and Social organization. No information.

Status and Conservation. Classified as Least Concern on The IUCN Red List. This classification assessed a large area, perhaps including some populations that are now considered P. umbratus . Although Pacific slopes of the Choco are under serious threat of deforestation, Thomas’s Broad-nosed Bats seems relatively common in its actual area of occurrence.

Bibliography. Gardner (2008c), Solari (2016c), Velazco (2005), Velazco & Gardner (2009), Velazco & Patterson (2008), Velazco & Solari (2003).

Figures

165. White-lined Broad-nosed Bat (Platyrrhinus lineatus), 166. Short-headed Broad-nosed Bat (Platyrrhainus brachycephalus), 167. Heller's Broad-nosed Bat (Platyrrhinus helleri), 168. Matapalo Broad-nosed Bat (Platyrrhinus matapalensis), 169. Recife Broad-nosed Bat (Platyrrhinus recifinus), 170. Guianan Broad-nosed Bat (Platyrrhinus guianensis), 171. Incan Broad-nosed Bat (Platyrrhinus incarum), 172. Slender Broad-nosed Bat (Platyrrhinus angustirostris), 173. Brown-bellied Broad-nosed Bat (Platyrriunus fuscrventris), 174. Alberico’s Broad-nosed Bat (Platyrrhinus albericoi), 175. Greater Broad-nosed Bat (Platyrrhinus vittatus), 176. Choco Broad-nosed Bat (Platyrrhinus chocoensis), 177. Thomas’s Broad-nosed Bat (Platyrrhinus dorsalis), 178. Bufty Broad-nosed Bat (Platyrrhinus infuscus), 179. Darien Broad-nosed Bat (Platyriunus aquilus), 180. Eldorado Broad-nosed Bat (Platyrrhinus aurarius), 181. Ismael’s Broad-nosed Bat (Platyrrhinus ismaeli), 182. Quechuan Broad-nosed Bat (Platyrrhinus masu), 183. Shadowy Broad-nosed Bat (Platyrrhinus umbratus), 184. Western Broad-nosed Bat (Platyrrhinus nitelinea), 185. Velvety Fruit-eating Bat (Enchisthenes hart), 186. Honduran White Bat (Ectophylla alba)

Distribution. Based on its most updated definition, known from Andean slopes of Colombia and Ecuador .