The Ophryotrocha labronica group (Annelida: Dorvilleidae) — with the description of seven new species Author Paxton, Hannelore Author Åkesson, Bertil text Zootaxa 2010 2713 1 24 journal article 10.5281/zenodo.199650 04935f31-4d00-404d-9016-4831c3313c83 1175-5326 199650 Ophryotrocha labronica labronica La Greca & Bacci, 1962 Figure 2 A, B, H; 4D, E; Table 1 Ophryotrocha labronica La Greca & Bacci, 1962 : 15 , figs 1–4, 7, 8, 11–16, 18; Pleijel & Eide 1996 ; Dahlgren et al. 2001 ; Simonini 2002 ; Åkesson & Paxton 2005 ; Heggøy et al. 2007 ; Simonini et al. 2009 ; Wiklund et al. 2009 . Ophryotrocha labronica labronica: Paxton & Åkesson 2007 , figs 5–8. FIGURE 1. Photographs of live animals, larger animals female, smaller animals male, in dorsal view. A, Ophryotrocha costlowi , sp. nov. ; B, Ophryotrocha japonica , sp. nov. ; C, Ophryotrocha macrovifera , sp. nov. ; D, Ophryotrocha robusta , sp. nov. ; E, Ophryotrocha rubra , sp. nov. , close-up to show red spots; F, Ophryotrocha vellae , sp. nov. , egg tube with large number of larvae ready to be released, jaws of individual larvae appear as black spots, female inside tube, head towards right, male on lower surface of tube, head towards left. Material examined. Type material: Neotype ( SMNH 6422), cultured from specimens collected in the Bay of Naples (Mergellina harbour) Italy , 1965. Other material: Live cultures from same collection. Diagnosis. Prostomium with short, ovate antennae, palps absent ( Fig. 2 A, B); two eyes medially connected; parapodia uniramous, lacking dorsal and ventral cirri, with dorsal protrusion; supra-acicular simple chaetae and subacicular coarsely serrated falcigers ( Fig. 2 H); pygidium with two cirri, pygidial median stylus absent in adults; up to five dorsal median rosette glands on posterior segments in males, up to three in females; anterior edge of mandibles with 25-28 teeth; maxillae with falcate P1-forceps, bidentate P2-forceps, K-forceps right bidentate, left falcate; gonochoristic; chromosomes 2n = 6; diameter of eggs 120–130 µm; tubular egg masses; released larvae without parapodia, with long pygidial median stylus ( Figs. 4 D, E). Remarks. For a detailed description see Paxton & Åkesson (2007) . Distribution. Mediterranean and adjacent eastern North Atlantic; South Pacific: Sydney, Australia . FIGURE 2. SEM images. A, Complete female Ophryotrocha labronica labronica , dorsal view; B, same, ventral view; C, anterior end of Ophryotrocha vellae , sp. nov. , dorsal view; D, anterior end of Ophryotrocha macrovifera , sp. nov. , ventral view; E, nuchal organ of Ophryotrocha vellae , sp. nov. ; F, median parapodia of Ophryotrocha macrovifera , sp. nov. ; G, chaetae of same; H, falciger of Ophryotrocha labronica labronica . TABLE 1. Comparison between species of the O. labronica group.