Audouin and Milne-Edwards, 1833

Description
Body delicate and transparent.
Prostomium with three antennae and two similar palps. A single pair of very big, lensed eyes.
First segment dorsally incomplete, with three pairs of short tentacular cirri ventrally. The first parapodial segment following with reduced parapodia but the fifth and succeeding segments with well-developed uniramous parapodial lobes, terminating in two cirriform appendages. Chaetae all slender compounds. Dorsal and ventral cirri leaf-like.
Pygidium with two cirri.
Pharynx eversible, with two lateral horns. No jaws.

Size
Length up to 60 mm for 60 segments.

Colour
Transparent, eyes red.

Depth range
Pelagic.

Distribution
Northern North Sea, Atlantic Ocean; possibly world-wide.

Kingdom Animalia
Phylum Annelida
Class Polychaeta
Order Phyllodocida
Superfamily Phyllodocidacea
Family Alciopidae
Genus Alciopa
species Alciopa reynaudii

Status in World Register of Marine Species

Accepted name: Alciopa reynaudii Audouin & Milne-Edwards, 1833

Scientific synonyms and common names

Nauphantha celox | Greeff, 1876
Greeffia celox | (Greeff, 1876)

de Kluijver, M., S.S. Ingalsuo, A.J.L. van Nieuwenhuizen and H.H. Veldhuijzen van Zanten, 2000. Macrobenthos of the North Sea. Vol. II - Keys to Polychaeta, Nemertina, Sipuncula, Platyhelminthes and miscellaneous worm-like groups. World Biodiversity database, CD-ROM Series. Expert Centre for Taxonomic Identifications (ETI), University of Amsterdam, Amsterdam.

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

Kirkegaard, J.B., 1992. Havbørsteorme I. Danmarks Fauna, 83: 1-416.

Muus, B.J., 1953a. Polychaeta. Families: Aphroditidae, Phyllodocidae and Alciopidae. Fiches d'Identification du Zooplancton, 52 (1953). Conseil International pour l'Exploration de la Mer, Kopenhagen.

Pleijel, F. and R.P. Dales, 1991. Polychaetes: British phyllodocoideans, typhloscolecoideans and tomopteroideans. Synopses of the British Fauna (New Series), 45. 202 pp.

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