<mods:titleid="6F3E661098724B6EC465ACD4023EEAFF">Molecular identification and larval morphology of spionid polychaetes (Annelida, Spionidae) from northeastern Japan</mods:title>
<mods:affiliationid="ACBBB3E6EE5230BC310FABE020B7179A">Department of Biology, Center for Liberal Arts & Sciences, Iwate Medical University, Idaidori 1 - 1 - 1, Yahaba-cho, Shiwa-gun, Iwate 028 - 3694, Japan</mods:affiliation>
Overall body shape short and thick. Prostomium broad and straight or slightly notched anteriorly. Lateral parts of peristomium clearly demarcated from prostomium. Palps attached to outer end of lateral parts of peristomium. Two pairs of red or black eyes present. Faint yellow pigment may be present in anterior part of prostomium and posterior part of pygidium. In late larvae, pair of prominent antero-lateral processes on prostomium developed. Melanophore absent, black or yellowish pigmentation occur in some species. Nototrochs weakly developed, occur in all chaetigers except first chaetiger. Gastrotrochs occur regularly in every other chaetiger from chaetiger III onwards (
<bibRefCitationid="941A1604699F41F2D22B409CDA73DD96"author="Carrasco, FD"journalOrPublisher="Gayana Zoologia"pageId="0"pageNumber="1"pagination="1 - 63"refId="B40"refString="Carrasco, FD, 1976. Larvas de la familia Spionidae (Polychaeta) en el plancton de la Bahia de Concepcion, Chile. Gayana Zoologia 38: 1 - 63"title="Larvas de la familia Spionidae (Polychaeta) en el plancton de la Bahia de Concepcion, Chile."volume="38"year="1976">Carrasco 1976</bibRefCitation>
<bibRefCitationid="5BCB7E887951B44EBE1DF581BC879138"DOI="https://doi.org/10.1080/00222930701376717"author="Radashevsky, VI"journalOrPublisher="Journal of Natural History"pageId="0"pageNumber="1"pagination="985 - 997"refId="B148"refString="Radashevsky, VI, 2007. Morphology and biology of a new Rhynchospio species (Annelida: Spionidae) from the South China Sea, Vietnam, with the review of Rhynchospio taxa. Journal of Natural History 41: 985 - 997, DOI: https://doi.org/10.1080/00222930701376717"title="Morphology and biology of a new Rhynchospio species (Annelida: Spionidae) from the South China Sea, Vietnam, with the review of Rhynchospio taxa."url="https://doi.org/10.1080/00222930701376717"volume="41"year="2007">Radashevsky 2007</bibRefCitation>