Rhinolophus chiewkweeae, Yoshiyuki & Lim, 2005

Burgin, Connor, 2019, Rhinolophidae, Handbook of the Mammals of the World – Volume 9 Bats, Barcelona: Lynx Edicions, pp. 280-332 : 332

107 . Chiew Kwee’s Horseshoe Bat

Rhinolophus chiewkweeae

French: Rhinolophe de Chiew Kwee / German: Chiew-Kwee-Hufeisennase I Spanish: Herradura de Chiew Kwee

Taxonomy. Rhinolophus chiewkweeae Yoshiyuki & B. L. Lim, 2005 ,

“Gunung Ledang, 2°84’N, 102°57’E, Tangkak, Muar,Johore, a submontane dipterocarp forest approximately 1276 m in elevations, Malaysia.”

Rhinolophus chiewkweeae is included in the pearsonii species group, and appears to be closely related to R.pearsonii . Monotypic.

Distribution. Malay Peninsula, including Langkawi I.

Descriptive notes. Head—body 51-5—65 mm, tail 14- 7-19 mm, ear 20- 1-26 mm, hindfoot 12-14- 4 mm, forearm 51-9- 56- 1 mm. Dorsal pelage is orangish brown, while ventral pelage is lighter. Ears are moderately large. Noseleaf has a broadly triangular, long, and nearly parallel straightsided lancet; connecting process starts at the tip of the sella and is low and arched; sella is broadly rounded at the tip and broader at the base; horseshoe is wide (11- 6 mm) and covers the muzzle, with a distinct median emargination. Lower lip has one mental groove. Baculum is similar to that of Pearson’s Horseshoe Bat (. pearsonii ) and is fairly long (3- 3 mm long), having a deep U-shaped emargination and a thick lateral expansion on the ampulla. Skull is large and robust (zygomatic width greater than mastoid width); anterior median swellings are well developed; lateral swellings are less swollen and the posterior swellings are relatively concave; rostral profile is low; frontal depression appears to be relatively shallow; sagittal and supraorbital crests are well developed. C1 is weak; P2 is relatively large and within the tooth row; P3 is minute and extruded from the tooth row, allowing P2 and P4 to touch.

Habitat. Typically found in hill and lowland dipterocarp forests, at elevations from around sea level up to 1276 m.

Food and Feeding. No information.

Breeding. No information.

Activity patterns. Call shape is FM /CF/FM with peak F of 53-6-54-7 kHz, duration of 28-4-63-3 milliseconds, and interpulse interval of 32—289 milliseconds, in eastern Peninsular Malaysia.

Movements, Home range and Social organization. No information.

Status and Conservation. Not assessed on The IUCN Red List. The overall range of Chiew Kwee’s Horseshoe Bat is quite small. Deforestation is likely to be a major threat to the species. Due to reservoirs for hydroelectric schemes, mercury accumulates at high concentrations in this species, which may well be a localized threat.

Bibliography. Kumaran, Daud et al. (2013), Morni et al. (2016), Pounsin et al. (2018), Syaripuddin et al. (2014), Yoshiyuki & Lim (2005), Zalipah et al. (2019).

Figures

On following pages: 94. Thomas's Horseshoe Bat (Rhinolophus thomasi); 95. Lesser Horseshoe Bat (Rhinolophus hipposideros); 96. rancis's Woolly Horseshoe Bat (Rhinolophus trancisi); 97. Lesser Woolly Horseshoe Bat (Rhinolophus sedulus); 98. Trefoil Horseshoe Bat (Rhinolophus trifoliatus); 99. Northern Woolly Horseshoe Bat (Rhinolophus perniger); 100. Selangor Woolly Horseshoe Bat (Rhinolophus luctoides); 101. Malaysian Woolly Horseshoe Bat (Rhinolophus mono); 102. Great Woolly Horseshoe Bat (Rhinolophus luctus); 1.03. Beddome's Woolly Horseshoe Bat (Rhinolophus beddomei); 104. Formosan Woolly Horseshoe Bat (Rhinolophus formosaë); 105. Thailand Horseshoe Bat (Rhinolophus thailandensis); 106. Dobson's Horseshoe Bat (Rhinolophus yunanensis); 107. Chiew Kwee's Horseshoe Bat (Rhinolophus chiewkweeae); 108. Pearson's Horseshoe Bat (Rhinolophus pearsonii); 109. Mitred Horseshoe Bat (Rhinolophus mitratus).

Distribution. Malay Peninsula, including Langkawi I.