Robertianella McIntosh, 1885

Barnich, R. & Fiege, D., 2000, Revision of the Mediterranean species of Harmothoe Kinberg, 1856 Lagisca Malmgren, 1865 (Polychaeta: Polynoidae: Polynoinae) descriptions of a new genus and a new species, Journal of Natural History 34, pp. 1889-1938 : 1926

Genus Robertianella McIntosh, 1885

Type species: Robertianella synophthalm a McIntosh, 1885.

Diagnosis. Fifteen pairs of elytra, more or less covering body. Prostomium with distinct cephalic peaks; median antenna in anterior notch, lateral antennae inserted ventrally. Parapodia biramous; neuropodia without supra-acicular process; tips of notoacicula penetrating epidermis, those of neuroacicula never penetrating. Notochaetae stout, with very faint rows of spines and blunt tips; neurochaetae with very faint rows of spines only distally and with bill-shaped tips.

Description. Body dorsoventrally fl attened, short, with up to 43 segments; body more or less covered by elytra or short tail uncovered (in large specimens). Fifteen pairs of elytra on segments 2, 4, 5, 7, on alternate segments to 23, 26, 29 and 32; rst pair rounded, the following oval to kidney-shaped; surface with few microtubercles; margin without papillae (fi gure 19B, C). Dorsal cirri with cylindrical cirrophores and long styles on segments lacking elytra (fi gure 19D); nodular dorsal tubercle on cirrigerous segments (fi gure 19A). Ventral cirri short (except on second segment), consisting of cirrophore and style on all segments (fi gure 19E). Nephridial papillae usually present from chaetiger 5 to the end of the body. Pygidium with one pair of anal cirri.

Prostomium bilobed, with distinct cephalic peaks, three antennae: ceratophore