Anatomical Note On A Tree Snail Amphidromus (Amphidromus) Cambojiensis (Reeve, 1860) From Vietnam (Eupulmonata: Camaenidae)

A joint expedition between the Natural History Museum, London and Vietnamese colleagues discovered living populations of the charismatic tree snail, Amphidromus (Amphidromus) cambojiensis (Reeve, 1860), in a protected area of southern Vietnam. The genital morphology of this species is documented herein and could be used to re-assess its subgeneric position. The unique morphological characters of the purplish-pink colouration inside the aperture, a short penis (about half of the length of the vagina), twisted flagellum, and a long appendix, all suggest classifying this species into the nominotypical subgenus. Based on available specimens, this species appears to be endemic to the southern portion of the Annamite Range in southern Vietnam and probably Cambodia.