Trapania undulata Smirnoff, Donohoo & Gosliner, 2022

トラパニア・ウンドゥラタ Trapania undulata
Photographed by
natanitomohiro 名谷朋浩
Wreck Point(Liberty), Tulamben, Pulau Bali, Indonesia
Water temperature


It has an elongated body typical of Trapania with a creamy white body throughout, including the extra-branchial and extra-rhinophoral appendages. Rhinophores are club-shaped with about nine lamellae and a pointed tip. Gill has a central, branching stalk flanked by two smaller branches. Both rhinophores and gills are reddish orange/brown becoming darker at the edges. The rhinophores are reddish orange basally and on the club the reddish orange is only found along the edges of the lamellae; the remainder of the rhinophores is the same colour as the body. Two black ridges run along the edge of the notal margin, approximately from the base of the rhinophores until just before the beginning of the extra-branchial appendages. The notal edge is thicker than the remainder of the body and varies in its width, creating the appearance of having an undulating margin. The anterior margins of the foot extend laterally as elongate appendages and are a more translucent white than the rest of the body. The oral tentacles are a more intense orange version of the rhinophore and gill coloration. The colour becomes lighter and more yellowish towards the tip, and darker and more dark-orange and black towards the base. This coloration continues across the oral veil creating a continuous mask that is mostly black with some reddish colour in the centre. The grey posterior foot had a dorsal indentation along its length creating two ridges along the lateral length. Slight bluish tint adorns the most posterior portion of foot.


Known only from Lipgo Island, Philippines.


From Latin word undulata, small wave, referring the notable undulating mantle margin of this species.