Dipolydora Verrill, 1879

Vı & Delgado-Blas, ctor H., 2008, Polydora and related genera (Polychaeta: Spionidae) from the Grand Caribbean region, Journal of Natural History 42 (1 - 2), pp. 1-19 : 6

Genus Dipolydora Verrill, 1879

Type species: Polydora concharum Verrill, 1879 , designated by Verrill (1881).

Diagnosis

Prostomium entire or incised, extending posteriorly as caruncle. Chaetiger 1 with or without notochaetae. Chaetiger 5 with major spines of one type, with or without companion chaetae; spines arranged in single curved row. Posterior notopodial spines present or absent. Neuropodial bidentate hooded hooks from chaetigers 7–17, usually with recurved shaft without constriction; main fang forming wide angle with shaft and narrow angle with apical tooth. Branchiae begin posterior to chaetiger 5. Pygidium disc-like, cuff-shaped, with two, three, or four lobes of various forms, or with four or more small papillae. Anterior part of digestive tract sometimes with enlarged, thick gizzard-like structure.

Remarks

Dipolydora was resurrected by Blake (1996); it is one of the largest of the polydorid genera, with 36 species, and these species were arranged in five groups based on their features by Blake (1996); with the new species described by Sato-Okoshi and Takatsuka (2001) and Manchenko and Radashevsky (2002) there are now 40 species.