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 pacifica Paxton & Åkesson, 2007 Table 1 Ophryotrocha labronica pacifica Paxton & Åkesson, 2007 : 16 . Material examined. Type material: Holotype ( SMNH 6423), cultured from specimens collected in Sagami Bay, Japan 1979. Other material: Live cultures from same collection. Diagnosis. Morphology as for nominotypical subspecies; genetic distance expressed as a moderate fitness decrease in F1 hybrids, but a severe hybrid breakdown in F2 and lowered viability in crosses between subspecies. Distribution. North Pacific Ocean: Sagami Bay, Japan ; Hawaii; Los Angeles, California, USA .