No common name

Lineus longissimus

ORDER

Heteronemertea

FAMILY Lineidae

TAXONOMY

Lineus longissimus (Gunnerus, 1770), Norway.

OTHER COMMON NAMES None known.

OTHER COMMON NAMES None known.

PHYSICAL CHARACTERISTICS

The longest nemertean known, individuals of 16.4-32.8 ft (5-10 m) length are common and specimens of up to 98.4 ft (30 m) are reported. Flaccid body contracts and extends in series of irregular muscular waves when disturbed. Colors range from dark olive-brown or rich chocolate brown in smaller specimens to blackish brown to black in larger animals. Flickering purplish iridescence often evident, resulting from activity of epidermal cilia. Ventral color may be paler than dorsal. Tip of head pale or whitish and usually appearing bi-lobed. There are 10-40 reddish brown or black eyes in a row on each side of the snout.

DISTRIBUTION

From Iceland eastwards to the Atlantic and North Sea coasts of Europe.

HABITAT

Typically found on the lower shore beneath boulders on muddy sands, but also in rockpools or in deeper sublittoral locations on muddy, sandy, stony, or shelly bottoms.

BEHAVIOR

Epidermis contains toxic/noxious substances; probably a defense mechanism.

FEEDING ECOLOGY AND DIET

Nothing is known.

REPRODUCTIVE BIOLOGY

Separate sexes, external fertilization with pelagic larvae.

CONSERVATION STATUS

Not threatened.

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