Endemic to Western Ghats (Ref. 50614). Known from the upper reaches of the Cauvery basin; recent collections have been at Coorg (present-day Kodagur), upstream of the type locality (Srirangapatam in Karnataka), just above which the river has been dammed (Ref. 55036). Despite extensive search made in March 1996, no specimens of this species were found in the Cauvery at Srirangapatam (Ref. 55036). Also Ref. 43640, 41236, 40976.
Status of threat: Endangered (Ref. 50614), critically endangered (Ref. 43611).
Status of threat: Critically endangered (Ref. 43611).