This paper deals with the surface morphology and structure of suctorial mouthparts, expanded paired fins and adhesive organ (AO) in a mountain stream catfish Glyptothorax sinense sikkimensis of India, as studied by scanning electron microscopy. It possesses type I taste buds on its barbels and lips. There are scattered unculiferous plaques on the lower lip and horny tubercles on outer fin rays, and knob like microstructures between fin rays of both paired fins. The thoracic region bears a prominent AO, which has 8-10 unculiferous ridges arranged parallel to the body axis, separated by many non-unculiferous grooves. The latter may act as the major attachment sites and function as a suction cup. A combined action of the adhesive devices with their unique surface specializations enables the fish for better anchorage to sandy-rocky substratum of glacier-fed, rapid mountain streams. The plaques on lower lip and horny tubercles and knob like substructures in fin rays perhaps help in additional anchorage support to the major AO located at the thoracic area.

中文翻译：

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锡金鲶鱼黏附面的形态学

本文通过扫描电子显微镜研究了印度山涧鲶鱼 Glyptothorax sinense sikkimensis 的吸嘴口器、扩展的成对鳍和粘附器官 (AO) 的表面形态和结构。它的触须和嘴唇上有 I 型味蕾。下唇上有散在的无毛斑块，外鳍条上有角质结节，两对鳍条的鳍条之间有瘤状微结构。胸椎区域有一个突出的AO，有8-10个平行于体轴排列的无刺脊，被许多无刺的沟隔开。后者可以作为主要的附着点并起到吸盘的作用。粘合装置与其独特的表面特化相结合，使鱼能够更好地锚定在冰川喂养的快速山溪的沙质岩石基质上。下唇上的斑块和角质结节和鳍条中的瘤状亚结构可能有助于为位于胸廓区域的主要 AO 提供额外的锚固支撑。