Home|Search|Identify|Taxonomic tree|Quiz|About this site|Feedback
Developed by ETI BioInformatics
Characteristics, distribution and ecology
Taxonomische classification
Synonyms and common names
Literature references
Images, audio and video
Links to other Web sites

De Silva & Knight-Jones, 1962

Body twisted left, with 3 thoracic chaetigers.
Opercular plate flat (concave in young specimens) or domed, talon bilobed but conical in side view. 3-5 pairs of radioli. Tips of radioli similar in length to adjacent side-branches.
Collar slightly asymmetrical but without obvious flap.
Two last thoracic segments with neuropodia only. Body with a long achaetigerous part between the thorax and abdomen.
Collar chaetae with toothed fin and finely toothed blade (no cross-striations). 2nd and 3rd notopodia with slender, nearly smooth, capillaries; 3rd notopodium with additional Apomatus-chaetae. Abdominal neuropodial chaetae strongly geniculate, with the terminal part coarsely toothed. Uncini with many rows with teeth (S. corallinae-detail).

Up to 3.5 mm long for 19-28 chaetigers.

Tube sinistral, about 1 mm coil diameter, smooth and with the last whorl partially above the previous ones (owing to narrow substratum), walls porcellaneous.

Orange coloured.

Normally on Corallina officinalis , occasionally on Chondrus , in rock pools and shallow water.

Irish Sea, English Channel, northern North Sea, Kattegat, Öresund, probably also further distributed in the North Sea and to the east but often mistaken for Spirorbis spirorbis .

Spirorbis corallinae