Vespertilio mystacinus sibiricus Kastschenko, 1905 Vespertilionidae Don E. Wilson Russell A. Mittermeier 8LZB7 Kastschenko 1905 [2163,2453,1332,1378] Mammalia Vespertilionidae Myotis Animalia Chiroptera 184 946 Chordata species sibiricus    419.    Siberian Whiskered Myots    French: Murin de Sibérie/ German: Sibirien-Mausohr/ Spanish: Ratonero de Siberia   Other common names: Siberian Myotis   Taxonomy. Vespertilio mystacinus sibiricus Kastschenko, 1905,    Tomsk, Russia.  Subgenus Pizonyx; brandtiispecies group. Myotis sibiricusis traditionally considered a subspecies of M. brandi under the name M. b. gracilis, which is now considered a synonym of M. sibiricus. Myotis gracilishas been variously recognized as a distinct species, but M. sibiricus1s the oldest available name and thus has nomenclatural priority. Myotis sibiricusappears to be sister species to M. brandtii, but they are very tae Both species are very peculiarly embedded in the New World clade of Myotis, although the exact position of M. brandtiiand M. sibiricuswith respect to the New World Myotisis still not completely clear. Monotypic.    Distribution.E Asia from NE Mongolia to Russian Far East, NE China, Korea(including JejuI), N Japan( Hokkaido), and Kuril Is.   Descriptive notes.Head-body 38-51 mm,tail 32-45 mm, ear 12-15- 5 mm, hindfoot 8-10 mm, forearm 32-38 mm; weight 4-9- 5 g. The Siberian Whiskered Myotisis relatively small. Fur is shaggy and long. Dorsal pelage is dark brown to yellowish brown (hairs with metallic sheen on tips); venter is paler and grayer than dorsum. Bare parts of ears, muzzle, and membranes are dark brown. Ears are not truncated but are rounded at tips, and anterior margins are turned outward above centers; tragusis straight or slightly turned outward, being under one-half the ear length. Wing attaches to distal part of metatarsus on first toe, and calcar is long, lacking postcalcarial lobe. Uropatagium has straight vein running to ankle from just above base oftail. Anteorbital ridge is distinct, and lacrimal foramen is not exposed; braincase is low; basicochlear fissure 1s long; P? and P, are in tooth rows; and upper molars have protoconules. Chromosomal complement Bos 2n = 44 and FN = 50 ( Korea).   Habitat.Generally forested habitats at higher elevations and agricultural areas at lower elevations.   Food and Feeding.Siberian Whiskered Myotisfly low and forage along streams between mountains and agriculturalfields.   Breeding.Births of Siberian Whiskered Myotisprobably occur in early July in Koreaand Japan, and lactating females have been observed from late July to early August in Hokkaido. Females have one young per pregnancy.   Activity patterns.Siberian Whiskered Myotisemerge in early evening and forage through the night. They use hollowsin trees for roots and will use caves as hibernacula. Calls are steep FM sweep, apparently with peak frequencies of 32-45 kHz.   Movements, Home range and Social organization.Siberian Whiskered Myotisare known to roost alone, with one individual using a hole or crevice in a cave for hibernation. Maternity colonies can have 20-60 females and their young.   Status and Conservation. Notassessed on The [UCN Red List. The Siberian Whiskered Myotiswas previously included in Brandt's Myotis( M. brandtii), which is classified as Least Concern. The Siberian Whiskered Myotisis widespread but rare throughout much of its distribution.   Bibliography.Jo Yeong-Seok et al. (2018), Kawai et al. (2003), Kruskop et al. (2012), Ohdachi et al. (2009), Stadelmann et al. (2007), Yoo & Yoon Myung-Hee (1992). 3783319373 [2344,2548,1545,1574] 184 946