Four New Species of the freshwater Fishes form Thailand

Abstract

The four new species of the freshwater fishes from Thailand in this article are classified into two major groups. The first one comprises of the two new species of Thai fresh water bars belongs to the genus Cyclocheilichthys which is one of the perplexing cyprinine fishes, they are C. furcatus and C. lagleri. The first species in described from the fish of the Mekong River while the second one of the Chao Phya River. Cyclocheilichthys furcatus has two pairs of well-developed barbells; circumpeduncular scales 16; circumferential scales 11/2/11; total number of vertebrae 34; total number of gill rakers 12-14; lateral-line scales 33 or 34, with multifid tubes in adults. The second species, C. laglari, has no barbell; circumpedun-cular scales usually 20; circumferential scales 12/2/15; total number of vertebrae 35 (rarely 36); total number of gill rakers 8-12; lateral-line scales 34-36, always with simple tubes. The second group is two new species of Tetraodon; T. baileyi and T. suvattii, they were found only in the Mekong River. The first species lacks of neither spines nor spinules, but the body covers with several finger-like tentacles on the upper part of head and other parts of the body. The second species has spinules and the head is flattened, its snout is rather long and sides of head with one oblique line from below eyes downward not beyond head area and one or two obscure lines.