Comprehensive Description

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Holotype complete except for lack of branchiae, 5 mm long and 0.5 mm wide for 30 chaetigers.

A species of median size, between 3 – 13 mm long. Body long, gradually tapering to the posterior end. Color in alcohol light tan to white. Prostomium slightly scoop-shaped, fused to peristomium and anterior segments. 15 thoracic chaetigers present, first bearig pairwise whirls of 15 – 20 palae. Palae stout and broad at base suddenly tapering to a delicate tip. First two subsequent segments only with notopodia. Twelve thoracic uncinigers and up to 15 abdominal uncinigers. Fifth-to-last thoracic unciniger with elevated parapodia connected by a dorsal ridge, with modified chaetae and uncinigers. Thoracic chaetae limbate, of two sizes. Limbate chaetae of fifth to last chaetiger of three sizes plus some simple capillaries. Thoracic uncini with three rows of small teeth, laterally kidney shaped. Those of fifth-to last chaetiger also with three rows of teeth, more or less round in lateral view. Abdominal uncinigers lacking notopodia, neuropodia with uncini with four rows of small teeth, one row of three teeth and one median main tooth. Pygidium with uneven margin, cirri lacking, anus terminal. Eight pairs of branchiae present, arranged in a row. Branchiae rather robust, digitiform, reaching back to about third chaetiger.


Public Domain

Ebbe, Brigitte

Source: Southern Ocean polychaetes

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