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 µm); 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.
