Advenogonium, Just, Jean & Wilson, George D. F., 2007

Just, Jean & Wilson, George D. F., 2007, Revision of Austrosignum Hodgson and Munnogonium George & Strömberg (Paramunnidae) with descriptions of eight new genera and two new species, (Crustacea: Isopoda: Asellota), Zootaxa 1515, pp. 1-29 : 13

Advenogonium gen. nov.

Type species. Austrosignum fuegiae Doti & Roccatagliata, 2005 . — Here designated.

Species included. Advenogonium fuegiae ( Doti & Roccatagliata, 2005) , comb. nov.

Diagnosis. Body ovate. Head front margin dorsoventrally thick in lateral view, concave in middle in dorsal view with low, broadly rounded lobes laterally. Pereonites dorsally smooth. Pleotelson lateral margins smooth. Eyestalks robust, conical, apex rounded, pointing laterad, length/width not definable but not overreaching pereonite 1. Antennula article 1 much shorter than eyestalk. Antenna article 3 with spines on lateral margin. Mandible palp present. Pereopod I carpus triangular, with 2 straight robust setae posteriorly; propodus with 2 robust setae on posterior margin. Pereopod II carpus and propodus posterior margin with a few short robust setae. Uropod endopod straight, apex truncate.

Etymology. The name of this genus includes the Latin advena meaning stranger.

Remarks. We have not seen material of this species. Our analysis is based on description and illustrations in Doti & Roccatagliata (2005: 510, figs 1–7). Doti & Roccatagliata (2005: 520) recognised that their Austrosignum fuegiae might need to be placed in a separate genus, but were unable to do so pending a re-definition of Austrosignum .

Advenogonium fuegiae differs from other genera with smooth pleotelson lateral margins by its bulbous, medially concave front margin of the head, conically tapering eyestalks, and the presence of a mandible palp.

Distribution. Beagle Channel, Argentina. 15– 35 m.