No common name

Situla pelliculosa

ORDER

Enterogona

FAMILY

Octacnemidae

TAXONOMY

Situla pelliculosa Vinogradova, 1969, Kurile-Kamchatka Trench, northwestern Pacific.

OTHER COMMON NAMES

None known.

PHYSICAL CHARACTERISTICS

This species is one of the most unusual ascidians. Large, up to 13.4 in (34 cm) in height. Upright, very soft body attached to small stones by a short, thick stem. Branchial orifice is enormously large and opens wide, exposing all internal organs. Atrial orifice is small and inconspicuous. Branchial sac is modified to thin, flat membrane; all organs are in small nucleus in the center of this branchial membrane.

DISTRIBUTION

Kurile-Kamchatka Trench, northwestern Pacific. HABITAT

Abyssal species recorded at depths from 16,400 to 27,560 ft (5,000-8,400 m).

BEHAVIOR

Sessile species.

FEEDING ECOLOGY AND DIET

The species probably has a mixed diet that includes small plankton invertebrates, such as copepods, and fine organic particles obtained by passive filtration.

REPRODUCTIVE BIOLOGY

Nothing is known.

CONSERVATION STATUS

Not listed by the IUCN.

SIGNIFICANCE TO HUMANS None known. ♦

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

Get My Free Ebook


Post a comment