Anobothrus Levinsen, 1884

Imajima, Minoru, Reuscher, Michael G. & Fiege, Dieter, 2013, Ampharetidae (Annelida: Polychaeta) from Japan. Part II: Genera with elevated and modified notopodia, Zootaxa 3647 (1), pp. 137-166 : 143-144

Anobothrus Levinsen, 1884

Type species: Ampharete gracilis Malmgren, 1866

Synonyms: Anobothrella Hartman, 1967: 155 –156. Melythasides Desbruyères, 1978: 232 –235.

Sosanides Hartmann-Schröder, 1965: 243 –246.

Generic diagnosis (emended). Prostomium with middle lobe delimited by incision, without glandular ridges. Buccal tentacles smooth or papillose. Three to four pairs of cirriform branchiae, all arising from fused segments II+III. Notochaetae in fused segments II+III originating from segment II or segment III, or both. Notochaetae originating from segment II, if present, varying in size from regular notochaetae size to strongly enlarged. Notochaetae originating from segment III, if present, varying from reduced in size to regular notochaetae size. 11– 12 thoracic uncinigers. Notopodial cirri absent. One anterior unciniger may have a circular glandular band around the circumference of the segment. Fourth-, fifth-, or sixth-to-last thoracic unciniger with one or more modifications: elevated notopodia, glandular ridge between notopodia, modified notochaetae. Two intermediate segments. Abdominal rudimentary notopodia absent. 1 pair of median nephridial papillae in segment IV may be present.

Remarks. The emended generic diagnosis takes into account that segment II and III are fused. The notochaetae from either segment II or III can be reduced, or they can be developed in both segments.