465. Chestnut Myotis Myotis badius French: Murin marron / German: Yunnan-Mausohr / Spanish: Ratonero castano Taxonomy. Myotis badius Tiunov, Kruskop & FengJiang, 2011, “Dashi Cave, near Shicaohe village, Shuanghe Town, Yunnan Province, China (24°29'N, 102°22°E).” Subgenus Myotis; siligorensis species group. Relationship of M. badius to other Myotis is uncertain, but it is included in this group because of its nyctalodont lower molars. Monotypic. Distribution. Known from four caves in Yunnan, China. Descriptive notes. Head—body 42 mm, tail 37 mm, ear 12- 5 mm, hindfoot 6-7 mm, forearm 35-38- 5 mm. Dorsal pelage is brownish chestnut; venteris light brown. Ears are comparatively short, and tragus is relatively short at a little less than one-half the ear length, with straight anterior border and lower one-third being widest. Wing attaches to metatarsus offirst toe, and calcar is unkeeled. Baculum is only c. 0-45 mm, straight, narrow, bluntly pointed distally, and slightly widened gradually to base; there is reduced urethral groove on bottom of basal one-half consisting of an oval depression. Forehead is distinctly elevated above low rostrum; sagittal crest is barely developed, and lambdoidalcrest isvisible laterally but weakly developed; C' is short, barely exceeding P* in height; P? is small, about two-thirds height of P* and one-half to twothirds the crown area but in tooth row; C,is also small, being shorter than P; P, and P, are small, with P, being one-half to two-thirds P, height; and M, is always nyctalodont, whereas M, is nyctalodont or seminyctalodont, and M, is almost always myotodont, rarely nyctalodont. Habitat. Known from limestone caves surrounded by heavily disturbed semi-evergreen subtropical forest and scrub habitats at elevations of ¢. 2000 m. Food and Feeding. No information. Breeding. No information. Activity patterns. No information. Movements, Home range and Social organization. No information. Status and Conservation. Not assessed on The IUCN Red List. The Chestnut Myotis is currently known from only four localities, and virtually nothing is known aboutits ecology or threats. Bibliography. Tiunov et al. (2011).

Published as part of Don E. Wilson & Russell A. Mittermeier, 2019, Vespertilionidae, pp. 716-981 in Handbook of the Mammals of the World – Volume 9 Bats, Barcelona :Lynx Edicions on page 966, DOI: 10.5281/zenodo.6397752