Flaskshaped sea cucumber

Rhopalodina lageniformis

ORDER

Dactylochirotida

FAMILY Rhopalidinidae

TAXONOMY

Rhopalodina lageniformis Gray, 1853, Congo.

OTHER COMMON NAMES

None known.

PHYSICAL CHARACTERISTICS

Unusual flask-shaped holothuroid to 4 in (10 cm) long. Body covered in plates. Mouth and anus adjacent atop a slender stalk above a globose body. Fifteen to 25 digitate tentacles in two concentric whorls. The doubled-over body gives the appearance of 10 radii along the body, unlike the canonical five of other echinoderms. The radii do not cross the ventral pole of the body. Ossicles are small knobby towers. Cruciform plates are present at the ventral pole. Tube foot plates have an elongate roughened end.

DISTRIBUTION

Atlantic Ocean along western coast of Africa from Senegal to Cabinda.

HABITAT

Coastal mud bottoms at 7-20 ft (2-6 m) depth. BEHAVIOR

Remains burrowed in mud with only its mouth and anus exposed.

Pseudocolochirus violaceus Psolus chitinoides Rhopalodina lageniformis

FEEDING ECOLOGY AND DIET

Nothing is known. The tentacle structure suggests this sea cucumber is a deposit feeder.

REPRODUCTIVE BIOLOGY Nothing is known.

CONSERVATION STATUS

Not listed by the IUCN or under the CITES convention.

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