Thulin, 1957

Description:
Body relatively small, broad, with up 64 segments.
Prostomium almost rectangular with a straigth edge anteriorly, without an obvious caruncle. Four eyes in a trapezoid arrangement.
Notopodial postchaetal lobes rectangular, high and broad, posteriorly becoming smaller.
Neuropodial postchaetal lobes rectangular to oval, smaller than notopodial ones.
Gills from chaetiger 1 to near end of body; only in anterior segments partially fused with postchaetal lobes. The first gill only half as long as the other ones.
All parapodia with finely winged capillary chaetae, from chaetiger 16-21 also 7-10 bidentate hooded hooks in neuropodia (S. goniocephala-detail).
Pygidium with two oval cirri, situated ventrally.

Size:
Up to 13 mm for 64 segments.

Colour:
In alcohol colourless.

Habitat:
On sand, 8-16 m deep.

Distribution:
Not common, Kattegat, Öresund, the Netherlands.

Kingdom Animalia
Phylum Annelida
Class Polychaeta
Order Spionida
Family Spionidae
Genus Spio
Species Spio goniocephala

Status in World Register of Marine Species

Accepted name: Spio goniocephala Thulin, 1957

Scientific synonyms and common names

Spio goniocephala Thulin, 1957
Spio filicornis Eliason, 1920 part
Microspio arctica Söderström, 1920 part

Hartmann-Schröder, G., 1996. Annelida, Borstenwürmer, Polychaeta. Tierwelt Deutschlands, 58: 1-648.

Kirkegaard, J.B., 1996. Havbørsteorme II. Danmarks Fauna, 86: 1-451.

Thulin, G., 1957. Über enige Spioniden (Polychaeta) aus dem Öresund. Kungl. Fysiogr. Sällsk. i Lund Förhandl., 27(5): 49-59.

You can continue searching for Spio goniocephala on one of these Web sites:

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