The Blind Electric Rays of the Genus Typhlonarke (Torpedinidae)
The G. Typhlonarke is endemic to New Zealand and is represented by two species, T. aysoni and T. tarakea. Both species are blind electric rays with concealed eyes, one dorsal fin, pelvies modified for walking or burrowing, and large electric organs with many fewer columns per organ than Torpedo. T. aysoni is circular in outline and the marginal part of the disc is thin. T. tarakea has an ovoidal disc with a thick rim. Both species are marine bottom-dwellers in shallow water.