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A new abyssal species of Acanthotrochus (Holothuroidea: Apodida) from the Aleutian Trench, North Pacific Ocean

 

Akito Ogawa, Chong Chen, Julia D Sigwart

 

A newly discovered sea cucumber species, Acanthotrochus verruciosseous sp. nov., has been described from more than 5200 m deep in the Aleutian Trench of the North Pacific—making it one of the deepest records for its genus. This rarely seen holothurian is clearly distinct from its closest relatives, with uniquely knobby wheel-shaped skeletal structures that have never been observed in other Acanthotrochus species.

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