Namanereis Chamberlin 1919

Namanereis Chamberlin, 1919

Namanereis Chamberlin, 1919: 196.

Type-species. Lycastis quadraticeps Chamberlin, 1919 by original designation.

Diagnosis. Frontal antennae present, 1 pair, or absent (rarely). Palpophore compact, no transverse groove; palpostyles spherical. Prostomium with entire anterior margin. Eyes present or absent. One apodous anterior segment, equal to or less than length of chaetiger 1. Three or four pairs of tentacular cirri. Tentacular cirri with distinct cirrophores or lacking cirrophores. Jaws with smooth or slightly crenulate cutting edge or with dentate cutting edge, forms with a crenulate cutting edge have 2 teeth proximally. Maxillary and oral ring of pharynx without paragnaths or papillae. Notopodium strongly reduced, lacking identifiable ligules or lobes. Dorsal cirri simple, lacking basal cirrophore. Neuropodial postchaetal lobe absent. Ventral neuropodial ligule absent. Ventral cirri single. Notoaciculae present on segments 1 and 2. Notochaetae are sesquigomph spinigers (usually absent). Neurochaetae dorsally are heterogomph spinigers (usually absent), sesquigomph spinigers (maybe absent), heterogomph falcigers; blades serrated. Neurochaetae ventrally are heterogomph spinigers (usually absent) heterogomph falcigers (some forms with very long blades = pseudospinigers). Pygidium with three incisions marking lateral and dorsal lobes. Anal cirri cirriform or conical or short, stout and appearing as an extension of the pygidium. Oocytes spherical (rarely), or ovoid.