Riseriopsis confusa (Thiel, Purschke & Böggemann, 2011) n. comb.

Fauveliopsis confusa Thiel, Purschke & Böggemann, 2011: 925–931, Figs 1, 2 C–F, 3, 4A–C.

TL: SE Atlantic. D: Only known from some localities in Angola and Guinea Basins, off Western Africa, 5137–5496 m.

Type material. Holotype (ZMH P-24873), R/ V Meteor, Cruise 63/2, Stat. 89 ES-S (00°43’ N, 05°31.2’ W), 5137–5141 m, 20 Mar. 2005 . Paratypes in two lots (ZMH P-24874), R/ V Meteor, Cruise 63/2, Stat. 89 ES-S (00°43’ N, 05°31.3’ W to 00°43’ N, 05°31.2’ W), 20 Mar. 2005, 5137– 5141 m; and (ZMH P-24876), R/ V Meteor, Cruise 63/2, St. 89 ES-E (00°43’ N, 05°31.3’ W to 00°43’ N, 05°31.2’ W), 5137–5141 m, 20 Mar. 2005 .

Diagnosis. Riseriopsis with up to 31 chaetigers. All chaetigers with one acicular and one capillary per ramus. Posterior chaetigers with falcate aciculars. Anal papillae abundant. GP not seen.

Remarks. Riseriopsis confusa belongs in Riseriopsis n. gen. because of its body shape, being progressively wider posteriorly, and by having almost smooth integument.

Riseriopsis confusa resembles R. santosae n. sp. because they are free living and their posterior chaetigers have hyaline chaetae. Their main differences, as indicated in the key above, involve their number of chaetigers, and the chaetal pattern in medial chaetigers. In R. confusa there are 15–31 chaetigers and medial notopodia have one acicular and one capillary per bundle, whereas in R. santosae n. sp., there are 37–88 chaetigers, and medial notopodia have only one acicular per bundle. Both species occur in the Atlantic but differ in the depth they have been found; R. confusa is an abyssal species, whereas R. santosae n. sp. occurs in shelf depths. Riseriopsis confusa was recently and thoroughly described including line drawings, histological sections and SEM photos. No further comments are needed.