This species can be distinguished from all other Neolarnaudia species by a suite of characters; carapace broader, frontal area with many granules, supraorbital margin granulated, suborbital and pterygostomian regions and merus of third maxilliped covered with many granules, terminal segment of Gonopod 1 strongly curved inwards and covered with many pubescences, lateral margin of telson strongly concaved. | TAP CHI SINH HOC 2017, 39(4): 398-405 Review of two genera of freshwater crabs, Larnaudia DOI: REVIEW OF TWO GENERA OF FRESHWATER CRABS, Larnaudia Bott, 1966 AND Neolarnaudia Türkay & Naiyanetr, 1987 (Crustacea: Decapoda: Potamidae) WITH REDESCRIPTION Neolarnaudiaphymatodes (Kemp, 1923) FROM SOUTHERN VIETNAM Do Van Tu1*, Dang Van Dong1, Le Van Tho2, Phan Doan Dang2 1 Institute of Ecology and Biological Resources (IEBR), VAST 2 Institute of Tropical Biology (ITB), VAST ABSTRACT: The occurrence of Larnaudia Bott, 1966 in southern Vietnam remains obscure. Although some previous studies recorded the presence of Larnaudia larnaudii A. Milne-Edwards, 1869 in Vietnam, our analysis of freshwater crab specimens collected at many locations in southern Vietnam revealed that Neolarnaudia Türkay Naiyanetr, 1987, but not Larnaudia Bott, 1966, is present in southern Vietnam. In this study, we recorded two species of Neolarnaudia, N. phymatodes (Kemp, 1923) and N. botti Türkay & Naiyanetr, 1987 in southern Vietnam. Neolaurnaudia phymatodes was poorly known since the original description, and is, thus, redescribed here. This species can be distinguished from all other Neolarnaudia species by a suite of characters; carapace broader, frontal area with many granules, supraorbital margin granulated, suborbital and pterygostomian regions and merus of third maxilliped covered with many granules, terminal segment of Gonopod 1 strongly curved inwards and covered with many pubescences, lateral margin of telson strongly concaved. Keywords: Larnaudia, Neolarnaudia, freshwater crabs, Vietnam. Citation: Do Van Tu, Dang Van Dong, Le Van Tho, Phan Doan Dang, 2017. Review of two genera of freshwater crabs, Larnaudia Bott, 1966 and Neolarnaudia Türkay & Naiyanetr, 1987 (Crustacea: Decapoda: Potamidae) with redescription Neolarnaudia phymatodes (Kemp, 1923) from Southern Vietnam. Tap chi Sinh hoc, 39(4): 398-405. DOI: . *Corresponding .