No common name

Didemnum studeri

ORDER Enterogona

FAMILY Didemnidae

TAXONOMY

Didemnum studeri Hartmeyer, 1911, Kerguelen Islands.

OTHER COMMON NAMES None known.

PHYSICAL CHARACTERISTICS

Colonial species forming thin stone colonies on rocks, which may reach 0.4 ft (1 m) or more in diameter, while the thickness is always less than 3.3 in (5 mm). Colony contains minute calcareous spicules and is white.

DISTRIBUTION

Circumpolar in the subantarctic. Especially common in the Strait of Magellan and surrounding islands.

HABITAT

Grows on stones and rocks and often found on roots or stems of algae. Occurs at depths from 16 to 5,554 ft (5-1,693 m) but chiefly in shallow waters.

BEHAVIOR

Sessile, attached, immobile species.

FEEDING ECOLOGY AND DIET Filter feeder.

REPRODUCTIVE BIOLOGY

Larvae incubate in colony in September.

CONSERVATION STATUS Not listed by the IUCN.

SIGNIFICANCE TO HUMANS None known. ♦

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