355.

Guillen’s Tube-nosed Bat

Murina guilleni

French: Murine de Guillen / German: Guillen-Rohrennase / Spanish: Ratonero narizudo de Guillen

Taxonomy. Murina guilleni Soisook et al., 2013,

“Rajjaprabha Dam, Ban Takhun District, Surat Thani Province, peninsular Thailand, 8°57’N, 98°47’E, 80 m a.s.l.”

See M. fionae . Two subspecies recognized.

Subspecies and Distribution.

M.g.guilleniSoisooketal.,2013—Penin-sularThailand.

M. g. nicobarensis Soisook et al., 2013 — Nicobar Is (Tillangchong, Bompuka, Camorta, Trinket and Great Nicobar); individuals similar to this species were also captured on Teressa, Katchal, and Nancowry Is.

Descriptive notes. Head—-body 42-51- 6 mm, tail 28- 1-42 mm, ear 11-4-15- 2 mm, hindfoot 7:7-9- 4 mm, forearm 31-9-35- 9 mm; weight 3-8 g. Males have slightly smaller body size than females. Fur silky. Dorsal pelage is orangish brown (hairs with gray bases and orange-brown tips); venter is mostly dark gray (hairs unicolored dark gray), with orange-brown tinge on neck and chest. Dorsal pelage extends sparsely onto wings, uropatagium, thumbs, and feet. Face is sparsely haired except for long protuberant naked nostrils. Ears are short, broad, and rounded, with smoothly convex anterior margins, no notch on posterior margins, and broadly rounded tips; tragus is long and narrow and tapers toward pointed tip. Wing attaches near base of claw on first toe. Baculum is heart-shaped, with M-shaped tip and pointed base, and dorsal surface is arched upward, whereas ventral surface is deeply concave. Skull has relatively domed braincase and short rostrum;sagittal crest is poorly developed; I2 is lateral to I’, and they are subequal in height; C! is taller than P*; P? is subequal in height to P*; M' and M* lack mesostyles, and labial surfaces have V-shaped indentation; and talonids of M, and M, are one-half to two-thirds the size of their respective trigonids.

Habitat. Disturbed secondary forests and undisturbed primary evergreen forests (Thailand) and over streams in gallery forests (Nicobar Islands) from sea level up to elevations of ¢. 80 m.

Food and Feeding. Guillen’s Tube-nosed Bats were observed flying slowly at no more than 4-5 m aboveground in the Nicobar Islands, suggesting that they forage in understories.

Breeding. A lactating Guillen’s Tube-nosed Bat was caught in mid-April in Thailand.

Activity patterns. Calls of Guillen’s Tube-nosed Bat are steep FM sweeps, with start frequencies of 175-184 kHz, end frequencies of 53-63 kHz, peak frequencies of 120-1 155-7 kHz, and durationsof 1-8-3-8 milliseconds (two males in Thailand). Recordings from two females in Thailand had start frequencies of 159-167 kHz, end frequencies of 50-57 kHz, peak frequencies of 120-7-157-7 kHz, and durations of 2-4-3 milliseconds.

Movements, Home range and Social organization. No information.

Status and Conservation. Not assessed on The [UCN Red List. Very little is known about ecology of the Guillen’s Tube-nosed Bat, and additional research is needed to clarify its conservation status.

Bibliography. Nguyen Truong Son et al. (2015), Soisook (2013), Soisook, Karapan, Satasook, Thong Vu Dinh et al. (2013), Soisook, Thaw Win-Naing etal. (2017).