Abstract
A new species of Trapania Pruvot-Fol, 1931 is described from near Rottnest Island, Western Australia. The new species Trapania safracornia shares several characteristics with other species of Indo-West Pacific Trapania. Those characters include a soft elongate body, no distinct mantle edge, two sets of curved dorsal lateral processes, non-retractile gill and rhinophores with no pockets, a radular formula of N x 1.0.1, a long tubular prostate and both a bursa copulatrix and a receptaculum seminis on the exogenous sperm duct. Characters that distinguish this as a new species include external red-brown coloration without any white spots, symmetrical white patches overlaid with yellow pigment, a yellow-tipped tail and lateral processes and a translucent red rhinophore club. Trapania safracornia also differs from the most externally similar species T. brunnea Rudman, 1987 in the radular morphology. Trapania safracornia has 10-14 main denticles per lateral tooth and up to eight additional small denticles between these. There is one small triangular denticle on the outside of the largest cusp at the base. The jaw rodlets of this new species are straight and pointed. A comparison between Trapania safracornia and other Indo-Pacific species of Trapania is presented.References
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