Diagnoses of six new species of Parosphromenus (Teleostei : Osphronemidae) from Malay Peninsula and Borneo, with notes on other species

Six new species of licorice gouramies of the genus Parosphromenus are described from Peninsular Malaysia, Sumatra and Borneo. Parosphromenus alfredi (from southeastern Johor, Peninsular Malaysia), P. opallios (from southwestern Kalimantan Tengah, Borneo), P. rubrimontis (from Perak, Peninsular Malaysia) and P. tweediei (from southwestern Johor, Peninsular Malaysia) were earlier identified as P. deissneri, a species restricted to Bangka Island; they are distinguished by details of coloration and dorsal and anal fin ray formulae. Parosphromenus pahuensis (from Mahakam Basin, Borneo), is distinguished in having 1-3 conspicuous black spots in the middle of the lower lateral dark stripe, a rounded caudal fin, 6-9 segmented rays in anal fin, 12-14 spines in dorsal fin and details of colour pattern. Parosphromenus quindecim (from southeastern Kalimantan Barat, Borneo) is distinguished in having 13-15 spines in dorsal fin, the absence of conspicuous black blotches on the lower lateral stripe, a black subdistal band in the dorsal, anal and caudal fins of the male, a rounded caudal fin, and impaired fins of female grey with numerous hyaline spots. The taxonomy of P. harveyi, P. allani and P. sumatranus are also discussed and lectotypes designated for the first two species.