Comprehensive Description

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Opercular lobes completely fused (entire), operculum longer than wide. Operculum with distal end slope absent (opercular disc perpendicular to longitudinal axis); opercular papillae 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 absent. Arrangement of outer paleae in semicircles. Angle of blades and axis of shafts geniculate (forming an angle); blade of outer paleae flat. Outer paleae denticles on lateral margins absent. Distal margins of outer paleae denticulated. Outer paleae medial plume present; smooth. Middle paleae present; pointing towards the center of operculum. Middle paleae one type only; angle of blades and axis of shafts geniculate (strongly geniculate); blade of middle paleae convex. Inner paleae giving the appearance of 2 rows. Arrangement of inner paleae in semicircles, angle of blades and axis of shafts geniculate (strongly geniculate); blade of inner paleae strongly convex. Medial organ absent. Nuchal spines or hooks absent. Neuropodia on segment 1 with 1 pair(s) of cirri. Neurochaetae on segment 1 present. Number of lateral lobes on segment 2: 2 pair(s). Number of parathoracic segments 1. Thoracic branchiae present. Parathoracic neurochaetae with lanceolate and capillary forms. Branchiae in posterior abdominal segments present. 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:
Mörch OAL. 1863. Revisio critica Serpulidarum. Et Bidrag til Rørormenes Naturhistorie. Naturhistorisk Tidsskrift, København, Series 3 1: 347-470.


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© Wilson, Robin

Source: Annelida LifeDesk

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