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Indocnemis orang (Förster in Laidlaw, 1907) (Figures 3– 10, 12N, 13H) Material examined. 1 ♀ exuvia (reared from larva), 1 ♂, 2 ♀♀ (last stadium larvae), Thailand, Nan Province, Sapun waterfall (19.190472 N, 101.199500 E, altitude 726 m a.s.l.), 25.xii.2020, T. S. Keetapithchayakul leg.; 1 ♂, 1 ♀ exuvia (reared from larvae), 1 ♂, 1 ♀ (last stadium larvae), Thailand, Surat Thani Province, Ratchaprapha Dam (9.09133 N, 98.64836 E, altitude 89 m. a.s.l.), 23.ii.2021, K. Wongkamheang and P. Danaisawadi leg.; 1♀ (last stadium larvae), Thailand, Chiang Mai Province, Royal Garden Siribhume (18.546996 N, 98.515119 E, altitude 1,325 m a.s.l.), 23.x.2021, T. S. Keetapithchayakul leg., Published as part of Keetapithchayakul, Tosaphol Saetung, Makbun, Noppadon, Phan, Quoc Toan, Danaisawadi, Patchara & Wongkamhaeng, Koraon, 2022, Description of the larva of Indocnemis orang (Förster in Laidlaw, 1907) (Odonata Platycnemididae: Calicnemiinae) from Thailand, with larval key to the known genera of the family Platycnemididae in Asia, pp. 504-520 in Zootaxa 5134 (4) on page 506, DOI: 10.11646/zootaxa.5134.4.2, http://zenodo.org/record/6541699

Taxonomic key to the known larvae of genera of family Platycnemididae in Asia The larval comparison was based mainly on Orr & Dow (2015b) supplemented with Fraser (1943); Lieftinck (1953); Eda (1965); Ishida (1996); Xu (2013); Orr & Dow (2016); Chen & Yu (2020); Saetung et al. (2020); Xu (2021). 1 Labium with one pair of premental setae................................................................... 2 1’ Labium with more than one pair of premental setae.......................................................... 6 2 Palpal setae with same length; vertical lamella caudal gills.................................................... 3 2’ Palpal setae with different length; triquetro - quadrate caudal gills (Fig. 13A), triradiate in transverse section.... Calicnemia 3 2–4 palpal setae; weakly and moderately produced ligula; caudal gills with or without petiole......................... 4 3’ 6 palpal setae; strongly produced ligula; foliate caudal gills with distinct petiole (Fig. 13G).................. Onychargia 4 3–4 palpal setae; moderately produced ligula; denodate or subnodate vertical lamella caudal gills..................... 5 4’ 2 palpal setae; weakly produced ligula (Fig. 12D); nodate vertical lamella caudal gills, oblong shaped (Fig. 13C)..... Nososticta 5 3 palpal setae; subnodate vertical lamella caudal gills, broad ovate shaped, with nodus on middle and distal thirds (Fig. 13F)............................................................................................. Caconeura 5’ 3–4 palpal setae; denodate vertical lamella caudal gills, ovate shaped, without nodus (Fig. 13K)............. Prodasineura 6 Labium with 2 pairs of premental setae.................................................................... 7 6’ Labium with more than 2 pairs of premental setae........................................................... 9 7 3–4 palpal setae; denodate vertical lamella caudal gills........................................................ 8 7’ 4 palpal setae; subnodate vertical lamella caudal gills (Fig. 13I) with fimbriated shape.......................... Copera 8 3 palpal setae; moderately produced ligula (Fig. 12G); presence of protuberance on occipital margin; body shorter than 1.3 x length of caudal gills........................................................................ Pseudocopera 8’ 3–4 palpal setae; strongly produced ligula (Fig. 12I); absence of protuberance on occipital margin; body longer than 1.5 x length of caudal gills......................................................................... Platycnemis 9 3–6 pairs of premental setae; 4–9 palpal setae; subdonate vertical lamella caudal gills.............................. 10 9’ 4 pairs of premental setae; 6–7 palpal setae; triquetro - quadrate type caudal gills (Fig. 13B), triradiate in transverse section.......................................................................................... Disparoneura 10 3–4 pairs of premental setae, 4–6 palpal setae; foliate to ovate caudal gills, with or without petiole (Figs. 13D, 13J) Coeliccia 10’ 5–6 pairs of premental setae, 8–9 palpal setae; ovate caudal gills, without petiole (Fig. 13H)................ Indocnemis

Trimerodytes yunnanensis (Rao & Yang, 1998), Mountain Water Snake, mainly occurs at elevations of more than 1,000 m above sea level (a.s.l.). We provide both a range extension to Lampang, Thailand, and the lowest known elevation record for this species at 400 m a.s.l. This record is also the southernmost known occurrence of T. yunnanensis and the genus as a whole. In addition, a morphological description of the juvenile, ecological notes in the field, and feeding habits in captivity are provided.