Pectinariidae de Quatrefages, 1866

Zhang, Jinghuai, Hutchings, Pat & Qiu, Jian-Wen, 2022, Pectinariidae (Annelida, Polychaeta) from the coastal waters of China, with description of new species and new records, Zootaxa 5151 (1), pp. 1-74 : 8

Family Pectinariidae de Quatrefages, 1866

Type genus. Pectinaria Lamarck, 1818

Diagnosis. Typical ice cream cone shaped tubes, composed of sand or shell fragments cemented in mucus. Conical and short body, with 26 segments. Prostomium fused to peristomium, forming circular to ovate cephalic veil, margin of cephalic veil smooth or cirrate; buccal tentacles originate ventrally, short, broad and tapering distally. Segment 1 developed laterally and dorsally, forming cushion-like rounded operculum with smooth or cirrate marginal lobe; large golden and flattened notopodial paleae tapering to tips, arranged in two dorso-lateral arched rows, near ventral margin of operculum; pair of digitiform tentacular cirri located at the connection of opercular margin and paleal ridge. Segment 2 also with pair of digitiform tentacular cirri, usually ventrally aligned to cirri of segment 1. Most species with two pairs of lamellate branchiae on segments 3 and 4. Notopodia with capillary notochaetae from segment 5, extending until segments 19–21, with two types of chaetae. Neuropodia beginning on segment 8, extending until segments 19–21, each with raised torus with a transverse row of uncini. Uncini short-handled with a U-shaped or circular anterior peg embedded into torus, several rows of minor teeth, one or several longitudinal rows of major teeth, each row with two or several major teeth. Posterior five segments fused to form a scaphe, flattened dorsally; with pair of transverse or oblique rows of stout hooks near dorsal margin of scaphe; with pair of lateral lamellae and an anal flap distally, but reduced in Petta and with an elongated anal cirrus.