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

(Linnaeus, 1767)

Description

External appearance
Solitary. Body globular to ovoid, attached by base and up to 20 mm in diameter. Test thick and leathery, bearing radially branched spines.

Characters
Both siphons 4-lobed and placed at the top. From 12-16 branched branchial tentacles of variable size. Branchial sac with numerous rows of straight and transversal orientated stigmata; six branchial folds per side; eight longitudinal bars per fold. Gut left of branchial sac; stomach narrow and small, not marked off from the rest of the gut but with many diverticula forming a complex liver. One long and lobed gonad on each side (B. echinata morphology).

Habitat
Attached to hard substrata; from shallow water to depths of about 350 metres.

Distribution
Arctic-Boreal distribution.

Boltenia echinata