No common name

Clavelina dellavallei

ORDER Enterogona

FAMILY Clavelinidae

TAXONOMY

Bradiclavella dellavallei Zirpolo, 1925, Naples Gulf, Italy.

OTHER COMMON NAMES None known.

PHYSICAL CHARACTERISTICS

Colonial species. Colony consists of a few, sometimes only one, upright zooids connected by basal stolons. Zooids are club-shaped, up to 2.4 in (6 cm) in length, and taper basally to a thin stalk. There are two large, plain-edged terminal siphons. Test is completely transparent, and all internal organs are clearly visible through it. The only opaque organ is the small gut loop; it is situated under the branchial sac and has deep blue coloring. Two vertical blue lines are seen inside the branchial sac, corresponding to the dorsal lamina and the endostyle.

DISTRIBUTION

This species is known only from the Mediterranean Sea. HABITAT

Rocky bottoms at depths from 33 to 295 ft (10-90 m).

BEHAVIOR

Sessile, attached, immobile species.

FEEDING ECOLOGY AND DIET Filter feeder.

REPRODUCTIVE BIOLOGY

Embryos are incubated in the atrial cavity on the right side of the branchial sac; they are very numerous, up to 50 in each zooid.

CONSERVATION STATUS Not listed by the IUCN.

SIGNIFICANCE TO HUMANS None known. ♦

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