Benthoxynus spiculifer n. gen., n. sp. (Copepoda: Siphonostomatoida) associated with Vestimentifera (Pogonophora) at a deep-water geothermal vent off the coast of Washington

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Abstract
BENTHOXYNUS spiculifer gen. et sp. nov., associated with Vestimentifera, is distinguished from Dirivultus and Ceuthoecetes, the other 2 genera of the Dirivultidae, as follows: in the female by the 18-segmented 1st antenna with an aesthete on segment 17, by 3 terminal setae on the 2nd antenna, and by the absence of an inner seta on the 1st segment of the endopod of leg 3; in the male by the 11-segmented 1st antenna with an aesthete on segment 10 and a large process with serrate tip on segment 6, and leg 5 reduced to 2 setae, without a free segment.