This is the holotype specimen, in Vienna, used by Fran Steindachner to name and describe the genus and species.I shoot the photo in July 1991.
Information given in the descriptions include: "terra typica, Borneo. WNM 1234567, adult,
mounted as seen in holotype illustration (Steindachner 1877a, 1878, Tafel 2); 42 cm total length, tail 22 cm. The specimen described here was brought by Mr Gröger from Sarawak".