Key to the species of Ptilomerinae (Hemiptera: Heteroptera: Gerridae) of Thailand and review of the fauna of the Tennaserim Mountain Range Author Raruanysong, Sajeemat Author Vitheepradit, Akekawat Author Sites, Robert W. text Zootaxa 2014 3852 1 101 117 journal article 10.11646/zootaxa.3852.1.4 527bebc8-3c9d-4353-b991-c92a913ee7dd 1175-5326 230500 D0876B07-5E29-4D4F-BFB4-968CFBA5BCE1 Key to the species of male Rheumatogonus of Thailand (modified from Chen & Nieser 2002) 1. Paramere with basal tooth pronounced; paramere semicircular ( Fig. 39 )............................... .. R. intermedius 1’. Paramere with basal tooth indistinct or lacking; paramere basal 2/3 parallel sided, distal 1/3 roundly right-angled ( Fig. 38 )............................................................................................. R. vietnamensis