This is the report of a new species of catfish, Kryptoglanis shajii nov. gen. and nov. sp., distinguished from all other genera of siluriform fishes by the combination of the following morphological characters: viz. the absence of dorsal fin; the presence of four pairs of barbels; an upwardly directed mouth, with a distinctly projecting lower jaw; subcutaneous eyes; anal fin completely confluent with the caudal fin; anal and caudal fins together carry 70–74 fin rays; and no spines in any of the fins. Kryptoglanis, which has a maximum recorded size of 59.1 mm in standard length, was collected from a well fed by subterranean springs. The type locality is a well located at the extreme western part of Western Ghats, near Chalakudy in Thrissur district, Kerala State, India.
Fig. S2. Dorsal view of the head of two live individuals of Kryptoglanis shajii nov. gen. and sp. to show the upwardly directed gape, distinctive cephalic sensory pores and position of eyes (JPEG 534 kb)
Movie S1. Video clip showing the foraging activity of Kryptoglanis shajii nov. gen. and sp. in laboratory (windows media video; dimensions 640 × 480; duration 1 min 21 s; bit rate 1,510 kbps; size 15.5 MB)
Movie S2. Spring flow in a well from where Kryptoglanis shajii nov. gen. and sp. was collected in January 2010 (windows media video; dimensions 640 × 480; duration 25 s; bit rate 1,510 kbps; size 4.9 MB)