Laogarra heokheei, a new genus and species of 'garra' from north-eastern Laos (Teleostei: Cyprinidae)

Laogarra heokheei, gen. nov. et sp. nov., is described from the Nam Mo watershed in Laos (a tributary of Song Lam, which flows eastwards to Vinh and the Gulf of Tonkin). It is distinguished from most other genera of garras in having the pulvinus margined posteriorly by an almost complete postpulvinal groove, with only a narrow interruption. Other diagnostic characters (none of them unique to Laogarra) include: pulvinus entire (not fragmented into several parts), roughly triangular, entirely devoid of papillae, with two oblique wrinkles orientated more or less parallel to lateral margins of pulvinus; posterior edge of labrum without posterior median notch; torus strongly curved, covered by papillae, at extremities rounded backwards around sides of pulvinus; toral groove curved at extremities around sides of pulvinus; labella continuous with labrum; three enlarged scales at caudal-fin base. Valid family-group names are finally established for Semilabeoina and Osteochilina.