Comprehensive Description

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Description

Opercular lobes partially fused (with deep indentation on ventral margin), operculum similar to maximum width or shorter. Operculum with distal end slope absent (opercular disc perpendicular to longitudinal axis); opercular papillae spherical, slightly longer than wide. Number of opercular papillae 4–8. Form of tentacular filaments compound (branching). Oral plates absent. Palps shorter than half length of the 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 absent. Tip of outer paleae markedly asymetrical. Middle paleae absent. Inner paleae giving the appearance of 1 row. Arrangement of inner paleae in semicircles, angle of blades and axis of shafts geniculate (strongly geniculate); blade of inner paleae concave, excavated. Inner paleae with internal fusiform outline absent. Medial organ present. 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 absent. 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:
Quatrefages, Armand de 1848. Etudes sur les types inferieurs de l'embranchements des Anneles. Memoires sur la famille des Hermelliens (Hermellea nob.). Annales des sciences naturelles, Paris, Ser. 3, 10: 5-58.
Schmarda, Ludwig K. 1861. Neue wirbellose Thiere beobachtet und gesammelt auf einer Reise un die Erdr 1853 bis 1857. Erster Band (zweite halfte) Turbellarian, Rotatorien un Anneliden. 1-164. Wilhelm Engelmann. Leipzig

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© Wilson, Robin

Source: Annelida LifeDesk

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