Occidozyga sumatrana (Peters, 1877) — Native. Microdiscopus Sumatranus W.C.H. Peters, 1877: 422, unnumbered pl., fig. 4, 4a. Holotype: ZMB 9123, according to Bauer et al. (1995: 49). Type locality: “ Lahat auf Sumatra ”, Indonesia. Yellow-bellied Puddle Frog (Figure 5C; Upper Seletar Reservoir Park) Singapore records. Phrynoglossus laevis (non Ģnther, 1858a)—Taylor, 1962: 353–358.—K.P. Lim & F.L.K. Lim 2002: 144. Occidozyga laevis laevis (non Ģnther, 1858a)— Inger, 1966: 240–243. Occidozyga laevis (non Ģnther, 1858a)—K. Lim, 1988f: 78 (Nee Soon Swamp Forest; Sime Road Forest).—K. Lim, 1989a: 4 (Nee Soon Swamp Forest).—K. Lim, 1989h: 66 (Nee Soon Swamp Forest; Sime Road Forest).—K.K.P. Lim, 1989a: 56 (Nee Soon Swamp Forest).—K.K.P. Lim & L.M. Chou, 1990: 56.—K.P. Lim & R. Subharaj, 1991: 4 (Nee Soon Swamp Forest).—K.K.P. Lim & C.M. Yang, 1991: 221 (Bukit Timah Hill [BTNR]).—K.K.P. Lim & F.L.K. Lim, 1992: 25, 143.—K.K.P. Lim & Subharaj, 1992: 9 (Sime Road Forest).—P.K.L. Ng & K.K.P. Lim, 1992: 260 (Nee Soon Swamp Forest).—L.M. Chou et al., 1994: 93.—R. Subaraj, 1994: 15 (MacRitchie North Forest; Rifle Range Pipeline; Seletar North Forest [USNF]; Sime Road Forest; Thomson Ridge Trail [TRF]).—K.K.P. Lim, 1994a: 330.—T.M. Leong & L.M. Chou, 1997: 99 (Central Catchment Area).—R.C.H. Teo & Rajathurai, 1997: 398.—Chan-ard et al., 1999: 17.—T.M. Leong & L.M. Chou, 1999: 97–98.— Das & Haas, 2005: 380.—Bickford et al., 2010: 121.—T.M. Leong, 2011: 22. Occidozyga sumatrana —N. Baker & K.P. Lim, 2008: 59, 158 (Pulau Tekong; Western Catchment Area).— P.K.L. Ng et al., 2011: 423.—N. Baker & K.P. Lim, 2012: 59, 158.—S.M. Chong et al., 2018: 253.—R.C.H. Teo & Thomas, 2019: 179 (Bukit Timah Nature Reserve). Occidozyga sumatranus —K.K.P. Lim, et al., 2016: 172 (Pulau Tekong).—R.C.H. Teo & Thomas, 2019: 152 (Bukit Timah Nature Reserve). Remarks. Specimen CAS 3251 was collected in 1927 by Smedley in a small stream at Mandai, yet the earliest published record of O. sumatrana from Singapore comes from Taylor (1962) who examined a specimen he likely collected (“M. 146”) and deposited at Chulalongkorn University. Furthermore, there are nine additional specimens at BPBM and FMNH collected between 1951 and 1959 around MacRitchie and NSSF. Three of these were examined by Inger (1966), but he did not provide any details on date and location. Occidozyga sumatrana was not reported again from Singapore until 22 years later (Table 2) when the first field observation was published by Lim (1988f) who found it common in shallow, leaf-littered streams of SRF and NSSF. Previously only known from CNR, populations were found at PT in 2002 (Lim et al. 2016) and WC in 2005 (Teo & Thomas 2019). Occurrence. Wide-ranging. Locally common. Singapore conservation status. Near-Threatened. Conservation priority. Moderate. IUCN conservation status. Least Concern [2022]. LKCNHM & NHMUK Museum specimens. Bukit Timah Nature Reserve: ZRC.1. 1290– ZRC.1.1294 (no date), ZRC.1.6278 (30-Dec-2000); Mandai Road: ZRC.1.5430– ZRC.1.5431 (15-Apr-1993); Mandai Orchid Garden [= MBP]: ZRC.1.12575 (20-Jan-2007); Nee Soon Swamp Forest: ZRC.1.1655 (27- Oct-1974), ZRC.1.12577 (02-Feb-2007), ZRC.1.2761– ZRC.1.2762 (30-Apr-1990), ZRC.1.2993 (08- Mar-1991), ZRC.1.3168 (20-Sep-1993), ZRC.1.1554 (29-Nov-1988), ZRC.1.1565– ZRC.1.1566 (17- Dec-1988), ZRC.1.1569– ZRC.1.1570 (31-Dec-1988), ZRC.1.1775 (28-Dec-1989), ZRC.1.1776 (31-Dec-1989), ZRC.1.1777– ZRC.1.1778 (17-Dec-1989), ZRC.1.4216 (16-Jan-1996), ZRC.1.4222 (01-Apr-1994), ZRC.1.5775– ZRC.1.5779 (29-Nov-2000), ZRC.1.10257 (24-Dec-2002); Pulau Tekong: ZRC.1.10144 (21-Feb-2002), ZRC.1.9226 (31-Jan-2002), ZRC.1.9244– ZRC.1.9245 (31-Jan-2002), ZRC.1.12498– ZRC.1.12500 (02-Jan-2013); Rifle Range Road: ZRC.1.3370 (01-Aug-1996), ZRC.1.3371 (01-Sep-1996), ZRC.1.3450 (05-Dec-1996); Sime Road Forest: ZRC.1.11097– ZRC.1.11102 (23-Oct-2003), ZRC.1.11354 (06-Sep-2004). Additional Singapore museum specimens. Singapore (no locality): FMNH; Catchment area between MacRitchie & Peirce Reservoirs [= SRF]: BPBM; MacRitchie Jungle: BPBM; Mandai: CAS; Nee Soon Forest: BPBM. Singapore localities. Bukit Timah Nature Reserve—MacRitchie (not specified)—MacRitchie North Forest— Mandai (not specified)—Mandai Bird Park—Mandai Road—Nee Soon Swamp Forest—Pulau Tekong— Rifle Range Road—Rifle Range Pipeline—Sime Road Forest—Thomson Ridge Forest—Upper Seletar North Forest—Upper Seletar Reservoir Park—Western Catchment Area.

Published as part of Figueroa, Alex, Low, Martyn E. Y. & Lim, Kelvin K. P., 2023, Singapore's herpetofauna: updated and annotated checklist, history, conservation, and distribution, pp. 1-378 in Zootaxa 5287 (1) on pages 37-38, DOI: 10.11646/zootaxa.5287.1.1, http://zenodo.org/record/7960319