Ulladulla, Lowry, J. K. & Kilgallen, N. M., 2015

Lowry, J. K. & Kilgallen, N. M., 2015, Debroyerella gen. nov. and Ulladulla gen. nov., two new lysianassoid genera (Crustacea, Amphipoda, Lysianassoidea), Zootaxa 3920 (1), pp. 153-162 : 156-157

Genus Ulladulla gen. nov.

Type species. Ulladulla selje sp. nov., by monotypy.

Included species. Ulladulla includes 1 species: U. selje sp. nov.

Etymology. Named for the fishing village of the same name on the New South Wales coast.

Diagnostic description. Antenna 1 accessory flagellum vestigial; primary flagellum article 1 not elongate; with weak 1-field callynophore in male, absent in female. Mandible palp attached distally. Gnathopod 1 subchelate; coxa large, nearly as long as coxa 2; carpus subequal to or longer than the propodus. Pereopod 4 with welldeveloped posteroventral lobe. Telson cleft.

Remarks. Ulladulla gen. nov. is unusual in having a very reduced, almost vestigial, accessory flagellum and a weak, 1-field callynophore in the male, which is absent in the female. The molar of this genus is also peculiar, being columnar with a triturating surface that is almost triangular in shape. Allogaussia Schellenberg, 1926 , has an antenna 1 that is similar to that of Ulladulla , however, the telson of that genus is entire (deeply cleft in Ulladulla ).

Ulladulla is perhaps most similar to Cheirimedon . These taxa differ in the callynophore (absent or with weak 1-field callynophore in Ulladulla , with 2-field callynophore in Cheirimedon ), the relative length of the carpus of gnathopod 1 (slightly longer than propodus in Ulladulla , shorter than propodus in Cheirimedon ), and the pereopod 4 coxa (with a well-developed posteroventral lobe in Ulladulla , posteroventral lobe weakly developed in Cheirimedon ).