Bat diversity in the Simandou Mountain Range of Guinea, with the description of a new white-winged vespertilionid Author Decher, Jan Zoologisches Forschungsmuseum Alexander Koenig, Leibniz Institute for Animal Biodiversity, Adenauerallee 160, 53113 Bonn, Germany & Corresponding author: E-mail: J. Decher @ zfmk. de echer@zfmk.de Author Hoffmann, Anke Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Invalidenstr. 43, 10115 Berlin, Germany Author Schaer, Juliane Museum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Invalidenstr. 43, 10115 Berlin, Germany & Max Planck Institute for Infection Biology, Chariteplatz 1, 10117 Berlin, Germany Author N Orris, Ryan W. Department of Evolution, Ecology and Organismal Biology, Ohio State University, 4240 Campus Dr., Lima, OH 45804, USA Author Kadjo, Blaise Université Félix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d’Ivoire Author Astrin, Jonas Zoologisches Forschungsmuseum Alexander Koenig, Leibniz Institute for Animal Biodiversity, Adenauerallee 160, 53113 Bonn, Germany Author Monadjem, Ara All Out Africa Research Unit, Department of Biological Sciences, University of Swaziland, Private Bag 4, Kwaluseni, Swaziland & Mammal Research Institute, Department of Zoology & Entomology, University of Pretoria, Private Bag 20, Hatfield 0028, Pretoria, South Africa Author Hutterer, Rainer Zoologisches Forschungsmuseum Alexander Koenig, Leibniz Institute for Animal Biodiversity, Adenauerallee 160, 53113 Bonn, Germany text Acta Chiropterologica 2015 2015-12-01 17 2 255 282 journal article 10.3161/15081109ACC2015.17.2.003 470b137b-05b5-468a-b37e-6a315108ecc1 1733-5329 3943621 Mops nanulus J. A. Allen, 1917 New material ZFMK 2008.0310 , , FC, 8 March 2008 ; ZFMK 2008.0311 , , PF 17 March 2008 . A single male of this smallest West African molossid bat was captured in the canopy net over the creek in closed evergreen forest at FC and two females in the canopy net on the ridge at PF ridge. The specimen from PF carried an embryo of 20 mm crown-rump length. Verschuren (1976) recorded two individuals near the River Douoble at Liberian Mount Nimba. At Njala, Sierra Leone , nine adult females with three young were found roosting in a crack of a tree, others in a thatched roof and one in a bamboo thicket. Mops nanulus is considered a high forest and fringing forest species ( Rosevear, 1965 ; Grubb et al. , 1998 ). Upon the discovery of this species in DR Congo in 1917 seven individuals were found in a cavity high up in a tree, the entrance of which was concealed by epiphytic ferns ( Allen et al ., 1917 ). Our captures from the Foko Ridge show that this forest-dwelling molossid does leave the forest to hunt in open habitat. Conservation status Least Concern. Population trend is unknown ( IUCN, 2015 ).