A New Species of Trichodina Ehrenberg, 1830 (Ciliophora: Trichodinidae) from the Long Whiskers Catfish, Mystus gulio (Hamilton, 1822) (Siluriformes: Bagridae) in the Beel Dakatia of Khulna, Bangladesh

During a survey on species diversity of trichodinid ciliates from freshwater fishes in the Beel Dakatia located in Khulna District of Bangladesh, a new species of trichodinid ciliate was identified from the gills of Long Whiskers Catfish, Mystus gulio. This ciliate is described here as new species based on distinctness in a combination of morphological characters. The species differs morphologically from its congeners by its relatively small body diameter, with white porcelain Chinese soup spoons-shaped denticle and the argentophobic central area of adhesive disc looks like a centrally located glistening, undivided, almost spotless white circle, surrounded by dark and narrow wrinkle free perimeter and some other measurements