小口鼠鱚魚 (Notogoneus osculus)

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輻鰭魚綱

Gonorynchiformes 鼠鱚魚目

Gonorynchidae 鼠鱚魚科

Notogoneus 屬

產地：美國懷俄明州綠河組 (Green River Fm, Wyoming USA)

年代：始新世 (Eocene,54 ~ 37 Mya)

.osculus 為小口的意思，為Cope 於1885所發表，綠河組罕見的底棲性鼠鱚魚魚類，體長最大可達90公分，具有吸盤狀的嘴部，以嘴部吸取水中或沙中的生物為食，可能為夜行性。

幼魚

小口鼠鱚魚 (Notogoneus osculus)

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