Nymphon japonicum

Japanese: イトユメムシ（英語表記）Nymphon japonicum

Class: Pycnogonidae, Order: Pycnogonidae, Family: Pycnogonidae. Body length including proboscis is 1.5cm, walking legs are 5cm. The body is uniformly light yellow to light brown, sometimes tinged with red. There is an eye caruncle with four eyes on the dorsal surface at the rear end of the head. An ovipositor protrudes from the ventral side just before this, on which males lay spherical egg masses. This species lives on sandy and muddy bottoms at depths of 50-100m in central and southern Japan. N. longitarse , which has even longer walking legs, can be found off the coast of Hokkaido to the Sea of Japan. There are many closely related species in oceans around the world, and these species are generally indicators of warm and cold sea systems. (→ Pycnogonids)

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

ウミグモ綱ウミグモ目ユメムシ科。前端の吻を加えた体長 1.5cm，歩行肢は 5cm。体は一様に淡黄ないし淡褐色で，ときに赤色を帯びる。頭部の後端背面に4眼をもつ眼丘がある。その直前腹側より担卵肢が出ており，雄はこれに球状の卵塊をつける。日本の中・南部の水深 50～100mの砂泥底にすむ。北海道沿岸から日本海には歩行肢のさらに長いスネナガユメムシ N. longitarseがみられる。世界の海に近縁種が多く，一般に暖海系，寒海系の指標性を示す。 (→ウミグモ類 )

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