Trichodina sylhetensis sp. n. (Ciliophora:Trichodinidae) from the Mud Perch, Nandus nandus (Hamilton-Buchanan, 1822) (Nandidae) in Sylhet

Abstract

In the present article one new species of Trichodina Ehrenberg, 1830, named T. sylhetensis sp. n., is described from a freshwater fish, Nandus nandus (Hamilton-Buchanan, 1822) (Nandidae) in the Tanguar Haor of Sylhet. It is distinguished by having medium body dimensions; slim, rectangularly-angular blade with slightly curved distal margin and blunt tangent point; bluntly rounded, slender central part having no indentation and posterior blade apophysis; broad ray with equal thickness and bluntly rounded tip; and dark-stained centre of the adhesive disc. The general morphology of the silver impregnated adhesive disc of T. sylhetensis is probably more closely related to T. uniforma and T. kwando.