Ultrasurface structure of oromandibular area in a hill stream teleost Glyptothorax trilineatus Blyth, 1860

Abstract

AbstractUltrasurface structure of the oromandibular area of a hillstream catfish Glyptothorax trilineatus Blyth 1860, an inhabitant of the sub‐Himalayan streams of India is described. Scanning electron microscopic (SEM) study of these areas revealed a series of punctuation elevation from the general surface epithelium. Two types (types I and II) of taste buds (TB) could be identified where one type is with microvillar projections and others without any projection. Another type of cell, the basal cells, without any apical microvilli was also recorded. TBs were more concentrated on the ventral surface of the barbels. In most of the TBs, the pore is located at the centre of the elevation and surrounded by a circular area. Jaw sheath bears a single type of teeth, the papilliform teeth.