title: A new species of Tiwaripotamon Bott, 1970, from northern Vietnam, with notes on T. vietnamicum (Dang & Ho, 2002) and T. edostilus Ng & Yeo, 2001 (Crustacea, Brachyura, Potamidae).
abstract: A new species of potamid freshwater crab, Tiwaripotamon vixuyenense sp. nov., is described from caves in Ha Giang, northern Vietnam. The new species can be distinguished from congeners by a suite of characters, including the relatively small epibranchial tooth, more slender ambulatory legs and a proportionately stout male first gonopod. Molecular data using the mitochondrial cytochrome oxidase subunit I (COI) supports its placement as a new species. The molecular data also supports the inclusion of another species, Geothelphusa vietnamica Dang & Ho, 2002, from Ninh Binh, south of Hanoi, Vietnam in Tiwaripotamon Bott, 1970. The live coloration of T. vietnamicum and T. edostilus Ng & Yeo, 2001 is provided to help field identification.
authors.affiliation: Department of Life Science, National Chung Hsing University, 250, Kuo Kuang Road, Taichung 402, Taiwan; Email: htshih@dragon.nchu.edu.tw.
authors.forename: Hsi-Te
authors.initials: HT
authors.lastname: Shih
authors.affiliation: Institute of Ecology and Biological Resources (IEBR), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam; Email: unknown.
authors.forename: Van Tu
authors.initials: VT
authors.lastname: Do
mesh_terms: D000825:Animal Structures / Q000033:anatomy & histology; D000818:Animals; D003386:Brachyura / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics; D002681:China; D005260:Female; D008297:Male; D010802:Phylogeny; D014744:Vietnam