IUCN threat status:

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Comprehensive Description

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Description

Opercular lobes completely divided into two free lobes, operculum longer than wide. Operculum with distal end slope present (distal end oblique to longitudinal margin); opercular papillae spherical, slightly longer than wide, or digitiform, twice longer than wide. Form of tentacular filaments compound (branching). Oral plates absent. Palps shorter or similar in length to operculum. Medial organ (cirrus) at dorsal junction of lobes present. Number of outer paleae 5–120; arrangement of outer paleae in semicircles. Angle of blades and axis of shafts straight; blade of outer paleae flat. Outer paleae denticles on lateral margins absent. Distal margins of outer paleae smooth. Outer paleae medial plume present, or absent; smooth. Tip of outer paleae symetrical, or markedly asymetrical. Middle paleae absent. Number of inner paleae 6–40 pairs; inner paleae giving the appearance of 1 row. Arrangement of inner paleae in line covering inner margin of lobes, angle of blades and axis of shafts straight; blade of inner paleae cylindrical, like spines. Inner paleae with internal fusiform outline present. Medial organ present. Nuchal spines or hooks present; number of nuchal spines or hooks 1 pairs; tip shape of spines bent, hooklike. Limbation on hooks absent. Neuropodia on segment 1 with 1 pair(s) of cirri. Neurochaetae on segment 1 absent. Number of lateral lobes on segment 2: 3 pair(s). Number of parathoracic segments 2. Thoracic branchiae present. Parathoracic neurochaetae with lanceolate and capillary forms. Branchiae in posterior abdominal segments absent. Abdominal uncini with 2 rows of teeth. Dorsal papillae absent.

Description generated from: Hutchings, P.A., Capa, M., & Peart, R. 2012. Revision of the Australian Sabellariidae (Polycheata) and description of eight new species. Zootaxa, 3306: 1-60.

Additional references:
Kinberg, J.G.H. (1867) Annulata nova. Öfversigt af Königlich Vetenskapsakademiens förhandlingar, Stockholm, 23(9), 337-357.

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© Wilson, Robin

Source: Annelida LifeDesk

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