Pipistrellus affinis

• Main Authors: Bates, Paul J. J., Nwe, Tin, Bu, Si Si Hla, Mie, Khin Mie, Swe, Khin Maung, Nyo, Nyo, Khaing, Aye Aye, Aye, Nu Nu, Toke, Yin Yin, Aung, Naing Naing, Thi, Mar Mar, Mackie, Iain
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2005
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Mammalia; Chiroptera; Vespertilionidae; Pipistrellus; Pipistrellus affinis; Bates; Indian; Pipistrellus pipistrellus
• Online Access: https://doi.org/10.5281/zenodo.4335734; http://treatment.plazi.org/id/03B2593FDE48FFF0FF05EE45FD26F91C

Pipistrellus affinis (Dobson, 1871) Chocolate Pipistrelle Vesperugo ( Pipistrellus affinis ) Dobson, 1871: 213; Bhamo, north-eastern Burma (Myanmar) New material from Myanmar Mon State: Saddan Sin Cave, 30.10. 2002, 1 ♂ (H3); Indian Single Rock Temple Cave, 19.11.2002, 1 ♂ (H22). Previous records from Myanmar Kachin State: Bhamo (type locality of affinis ). Descriptive characters With a forearm length of 36.8, 37.3 mm based on two specimens from Myanmar (Table 4) (FA = 38.4–41.4 mm in Bates and Harrison, 1997), this is a medium- large species of pipistrelle. The pelage is soft and long. The hairs on the dorsal surface are dark brown, almost black, with the extreme tips of some the hairs pale grey-brown, giving a grizzled effect. The hairs on the ventral surface are almost white at the base but with dark tips; those nearest the anus are white throughout their length. The baculum, which is 3.3–3.4 mm in length, is broad, proximally widened and ventrally deeply fluted, with no distal expansion (Fig. 1G). In the skull, the rostrum is broad with median and lateral depressions. The brain- case is low and the zygomata, which are also robust have low but distinct postorbital processes. The first upper premolar (P2) is of moderate size, about two-thirds the crown area of the first upper incisor (I2); it is situated in the toothrow or slightly dis- placed internally. The first lower premolar (P2) is situated in the toothrow, its crown area about half to two-thirds that of the sec- ond (P4). Similar species The distinctive shape of the baculum distinguishes P. affinis from all other local pipistrelle species. In comparison to the skull of P. ceylonicus , the zygomata are more robust; the rostrum is broader than that of P. pulveratus unlike P. joffrei , the fifth digit is not reduced; and un- like A. circumdatus , the second upper incisor (I3) is half or more the height of the first (I2). Taxonomic notes The bacula of the two specimens of P. affinis differ in some morphological aspects from the baculum of a specimen ...