Thraulus (Thraulus) Eaton 1881

Subgenus Thraulus Eaton, 1881 Diagnosis. Identical to the generic diagnosis, except that gill I is always composed of one or two lanceolate and long lamellae. Type species. Thraulus bellus Eaton, 1881 by original designation. Included species. Thraulus (Thraulus) amravati Vasanth, Subramanian & Selvakumar, 2022 [southern India], T. (T.) bellus Eaton, 1881 [Europe], T. (T.) bishopi Peters & Tsui, 1972 [Peninsular Malaysia, Vietnam, southeastern China], T. (T.) connubialis Grant, 2024 [east Malaysia Sabah], T. (T.) cursus Grant, 2024 [Japan], T. (T.) cuspidatus Vasanth, Subramanian & Selvakumar, 2022 [southern India], T. (T.) demoulini Peters & Tsui, 1973 [Thailand], Th. (Th.) eloisae sp. nov. [Papua New Guinea], T. (T.) fatuus Kang & Yang, 1994 [Taiwan, Japan], T. (T.) femoratus Li, Liu & Zhou, 2006 [southeastern China], Th. (Th.) granti sp. nov. [Papua New Guinea], T. (T.) ishiwatai Grant, 2024 [Japan Okinawa], T. (T.) jacobusi Srinivasan, Sivaruban & Barathy, 2022 [southern India], Th. (Th.) longinquus sp. nov. [Papua New Guinea], T. (T.) macilentus Kang & Yang, 1994 [Taiwan, Japan], T. (T.) madagasikarensis Grant, 2024 [Madagascar], T. (T.) mudumalaiensis Soman, 1991 [southern India], Th. (Th.) nabire sp. nov. [Indonesia, Papua], T. (T.) nihonensis Grant, 2024 [Japan Okinawa], Th. (Th.) noe sp. nov. [Papua New Guinea], Th. (Th.) ogea sp. nov. [Papua New Guinea], T. (T.) plumeus Selvakumar, Vasanth & Subramanian, 2022 [northern India], Th. (Th.) timorensis sp. nov. [Indonesia, West Timor], T. (T.) turbinatus (Ulmer, 1909) [Comoros], T. (T.) umbrosus Kang & Yang, 1994 [Taiwan], T. (T.) vellimalaiensis Vasanth, Subramanian & Selvakumar, 2022 [southern India], Th. (Th.) wemale sp. nov. [Indonesia, Seram]. Distribution. Mainly in the Oriental and Palaearctic regions, with only two species known from the Afrotropical area in the islands of Comoros and Madagascar; the subgenus seems absent from continental Africa south of the Sahara, as well as from Australia.