Rhinolophus sinicus K. Andersen, 1905 Rhinolophus stheno K. Andersen, 1905

Zhang, Libiao, Jones, Gareth, Zhang, Jinshuo, Zhu, Guangjian & Parsons, Stuart, 2009, Recent surveys of bats (Mammalia: Chiroptera) from China. I. Rhinolophidae and Hipposideridae, Acta Chiropterologica 11 (1), pp. 71-88 : 80

Rhinolophus sinicus K. Andersen, 1905

Chinese rufous horseshoe bat

The species is most easily confused with R. affinis , from which it is best distinguished by its straight-sided lancet and the relatively short second phalanx of the third digit (<66% of the length of the metacarpal — Csorba et al., 2003). Unequivocal separation can seemingly be performed by sequencing the control region of mtDNA (authors’ unpublished data). Echolocation call frequencies overlap with those emitted by R. affinis . Rhinolophus affinis is also typically a larger species, though overlap occurs with R. sinicus at forearm lengths between 50–53 mm ( Fig. 4 ). Rhinolophus sinicus is very similar to R. thomasi from Myanmar, Vietnam, Lao PDR and Thailand, to which it is closely related and possibly conspecific. Call frequency for R. thomasi in Lao PDR is reported as 76–86 kHz ( Francis and Habersetzer 1998), and so the two taxa overlap considerably in call frequency. Rhinolophus thomasi is reported to have smaller upper canines than R. sinicus (Francis 2008) .

FA — 42.6–52.6 mm, mass — 8.5–14.3 g. Seventy-four males and 43 females were captured from Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Jiangxi, Sichuan, and Yunnan. The echolocation calls vary over the geographic range, from 73.4–88.5 kHz. The call frequencies (0 ± SD) of a sample of males (82.0 ± 2.0 kHz, n = 38) were lower than females (85.4 ± 1.9, n = 29 — Mann- Whitney W = 839, P <0.001), but the forearm lengths were not significantly different between sexes (♂♂: 46.9 ± 1.5, n = 37; ♀♀: 46.6 ± 2.0, n = 29; Mann-Whitney W = 1325, P> 0.05).

Previous records from China:, Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hubei Jiangsu, Jiangxi, Shaanxi, Sichuan, Tibet, Yunnan, Zhejiang ( Zhang, 1997; Wang, 2003).

Ecological Notes

Widespread in caves in southern China, but never abundant. Maximum count was 24 bats in one cave in Jiangxi. An abandoned brick kiln was used by a solitary male in Xinyi County.

Rhinolophus stheno K. Andersen, 1905

Lesser brown horseshoe bat

FA — 41.8–47.1 mm, mass — 10.3 ± 1.4 g (n = 6). Four males and three females were captured in Yunnan Province. These were the first records of R. stheno from China, and a detailed description was given in Zhang J. S. et al. (2005). The echolocation calls indicated that the FMAXE of R. stheno was about 87.2 kHz, while Robinson (1996) reported 85–90 kHz ( FA 46 mm), and Kingston et al. (2000) documented 86.1 kHz ( FA 48.8 mm), both in Malaysia.

Soisook et al. (2008) recently elevated R. microglobosus to species status and consider it distinct from R. stheno in Southeast Asia. Whereas R. stheno typically echolocates with FMAXE of 85–88 kHz, R. microglobosus calls at 92–101 kHz. Rhinolophus stheno had forearm lengths between 43.2–48.1 mm, whereas R. microglobosus was smaller on average ( FA — 41.4–46.3 mm). Rhinolophus stheno was found in the Thai-Malaysian peninsular and central Vietnam, with R. microglobosus distributed further north, also in Myanmar, Cambodia, Vietnam, and Lao PDR and hence closer to the border with China ( Soisook et al., 2008). Nonetheless, our echolocation call frequency measurements are consistent with the Chinese bats being R. stheno rather than R. microglobosus .

Ecological Notes

These records were the first for China: the bats were roosting in caves.

Rhinolophus stheno K. Andersen, 1905

Lesser brown horseshoe bat

FA — 41.8–47.1 mm, mass — 10.3 ± 1.4 g (n = 6). Four males and three females were captured in Yunnan Province. These were the first records of R. stheno from China, and a detailed description was given in Zhang J. S. et al. (2005). The echolocation calls indicated that the FMAXE of R. stheno was about 87.2 kHz, while Robinson (1996) reported 85–90 kHz ( FA 46 mm), and Kingston et al. (2000) documented 86.1 kHz ( FA 48.8 mm), both in Malaysia.

Soisook et al. (2008) recently elevated R. microglobosus to species status and consider it distinct from R. stheno in Southeast Asia. Whereas R. stheno typically echolocates with FMAXE of 85–88 kHz, R. microglobosus calls at 92–101 kHz. Rhinolophus stheno had forearm lengths between 43.2–48.1 mm, whereas R. microglobosus was smaller on average ( FA — 41.4–46.3 mm). Rhinolophus stheno was found in the Thai-Malaysian peninsular and central Vietnam, with R. microglobosus distributed further north, also in Myanmar, Cambodia, Vietnam, and Lao PDR and hence closer to the border with China ( Soisook et al., 2008). Nonetheless, our echolocation call frequency measurements are consistent with the Chinese bats being R. stheno rather than R. microglobosus .

Ecological Notes

These records were the first for China: the bats were roosting in caves.

Figures

FIG. 4. Representative echolocation calls of bats in the family Hipposideridae captured from China during our surveys. See text for data on intraspecific variation. Calls are from time expanded sequences of handheld bats with FFT size 1024 Hz, Hanning window. The species are arranged according to body size from large species (left) to small (right)