No common name

Kinorhynchus yushini

ORDER

Homalorhagida

FAMILY Pycnophyidae

TAXONOMY

Kinorhynchus yushini Adrianov, 1989, Northwest Pacific, Sea of Japan, Peter the Great Bay.

OTHER COMMON NAMES

None known.

PHYSICAL CHARACTERISTICS

Trunk length (TL) 0.0177-0.0220 in (450-560 pm); trunk hemitransparent; 4 dorsal and 2 ventral neck placids; MP on segments 4-11, bifurcated on segments 4-10, single on segment 11; segment 11 with very long lateral daggerlike elements.

DISTRIBUTION

Russian, Korean, and Japanese coasts of the Sea of Japan; off Pacific coast of Japan.

HABITAT

Intertidal and subtidal muddy sediments with a high organic content, at zero to 98 ft (zero to 30 m) deep.

BEHAVIOR

Very abundant in muddy sediments in shallow waters.

FEEDING ECOLOGY AND DIET

Selective deposit feeder on detritus and bacteria.

REPRODUCTIVE BIOLOGY

Six juvenile stages of "Leptodemus" type.

CONSERVATION STATUS

Not listed by the IUCN.

SIGNIFICANCE TO HUMANS None known. ♦

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