421.

Bartels’s Myotis

Myotis bartelsii

French: Murin de Bartels / German: Bartels-Mausohr / Spanish: Ratonero de Bartels

Taxonomy. Chrysopteron bartelsii Jentink, 1910,

“top (10,000 feet [= 3048 m]) of the Pangerango-mountain [= Mount Pangrango],” Java, Indonesia.

Subgenus Chrysopteron. See M. formosus, from which it was split based on cranial, dental, and external morphology. It has not yet been included into any phylogenetic study. See also M. hermani . Monotypic.

Distribution. Java (Mt Pangrango) and Bali.

Descriptive notes. Ear 20 mm, hindfoot 12 mm, forearm 53 mm (type specimen). General impression of the dorsal fur is red tipped with black; hairs have black bases, followed by either a pale-yellow section that progressively darkens distally to red, or otherwise entirely deep red. Ears are orange conspicuously edged black, with notch on back edge just below pointed end; tragus is long and tapered, with a straight front margin. Thumb, and underside of hindfoot entirely black. Wing membranes are orange between black fingers and attached at base of toe. Wings are closer to base of toes than in Weber’s Myotis ( M. weberi), and projecting tip oftail is shorter. Skull has shallow rostral depression and elongated supraorbital region; sagittal crest is prominent, lambdoid crests strong. Falls within the range of known variation of Herman's Myotis (M. hermani) in some skull measurements, and generally similar in cranial traits. Dentition is robust; I* with well-developed internal cusp and strong C'; I’ with well-developed cusp internally (not present in Herman’s Myotis); C! has wide base, and attains height twice that of P% P? is fully out ofline of rest of tooth row, has less than half the basal area of P?, and is not visible in lateral view of skull. Condylo-canine length 18- 5 mm, maxillary tooth row 8- 4 mm (both from type).

Habitat. No information.

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 as a separate species from the Black-and-orange Myotis ( M. formosus), which is classified as Least Concern. Bartels’s Myotis is definitely rare; much further study is needed.

Bibliography. Corbet & Hill (1992), Csorba, Chou Cheng-Han et al. (2014), Francis, Bates, Csorba et al. (2008), Jentink (1910), Kitchener & Foley (1985), Koopman (1994), Simmons (2005), Tate (1941d), Troughton (1929a).