Key to the species of Eotrechinae (Hemiptera: Heteroptera: Gerridae) of Thailand and review of the fauna of the Phetchabun Mountain Range Author Nakthong, La-Au Author Vitheepradit, Akekawat Author Sites, Robert W. text Zootaxa 2014 3860 1 47 63 journal article 10.11646/zootaxa.3860.1.2 a26eaf5f-4eba-45ad-8806-dd7288d78493 1175-5326 287060 B9713C6D-BC3B-4EF2-8495-8BDCD535A80D Amemboa (Amemboa) brevifasciata Miyamoto Figs. 10 , 24 Amemboa (Amemboa) brevifasciata Miyamoto 1967 : Nat. Life Southeast Asia 236. Diagnosis. Males of A. brevifasciata have a triangular pygophore in ventral view ( Fig. 24 ). with a knob-like tip projecting dorsocaudad. Further, the male profemur has two distinct hair patches ( Fig. 10 ), whereas A. javanica has a single hair patch and A. aquafrigida and A. speciosa each have three hair patches. Males of A. brevifasciata have an unmodified proximal half of the profemur, whereas A. cristata and A. riparia each have a proximally incrassate profemur. Discussion. Amemboa brevifasciata has been recorded from China , Indonesia , Malaysia , Singapore , Thailand , and Vietnam ( Polhemus & Andersen 1984 ; Zettel & Chen 1996 , 1997 ; Zettel et al. 2007). In Thailand , this species has been collected previously from Loei, Nakhon Nayok, Phitsanulok, and Ubon Ratchathani provinces ( Miyamoto 1967 , Polhemus & Andersen 1984 , Hanboonsong et al. 1996 , Zettel & Chen 1997 , Vitheepradit 2000 ). In this study, this species was collected from the margins and pools of streams almost throughout the Phetchabun Mountain Range. Material examined. THAILAND : Loei Province : Phu Kradung NP, Nam Pong, 16°48'N 101°41'E , 251 m , 4- V-2004 , A. Vitheepradit, L-661 (4 winged males, 2 wingless males, 3 winged females); Phetchabun Province : Amphur Mueang, Klong Neung, 16°21'N 101°15'E , 152 m , 30-IIII-2004 , A. Vitheepradit, L-652 (3 winged males, 1 wingless male, 3 winged females, 1 wingless female); Khao Kho NP, Tarntip Waterfall, 16°39'N 101°07'E , 182 m , 11-V-2004 , A. Vitheepradit and T. Prommi, L-678 (5 winged males, 6 winged females, 2 wingless females); Phitsanulok Province : Kaeng Jet Kwae NP, Kaeng Jet Kwae Waterfall, 17°08'N 100°26'E , 102 m , 13-V-2004 , A. Vitheepradit and T. Prommi, L-684 (3 winged males, 2 winged females); Thung Salaeng Luang NP, Poy Waterfall, 16°50'N 100°45'E , 211 m , 20-VIII-2012 , KU team, C-179 (2 wingless males, 6 wingless females).