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

(Jeffreys, 1859)

Shell minute, ovate and globose, rounded anteriorly, longer than wide, broadest anteriorly; with a maximum length of 1.5 mm. The external surfaces are smooth save for faint concentric growth lines. It is white or yellowish in colour with large and well-spaced punctae. Dorsal valve convex, its posterior margin nearly straight. Ventral valve as deep, convex, with a slight umbo. The deltidial plates are small and do not join medianly; the pedicle foramen is relatively large and incomplete.
Brachial support rudimentary; no median septum. Lophophore circular (with an anterio-median break), attached to the dorsal mantle (G. capsula internal).

On stones and shells (often with Argyrotheca cistellula ) on the bottom, or attached to shell-fragments and inside broken serpulid tubes in shell-gravel. It has been found in the intertidal and in shallow water (till 46 metres).

Widely distributed: off the north coast of Ireland, Irish Sea and Western Approaches.

Gwynia capsula