Abstract

The marine piscicolid leech Calliobdella knightjonesi sp. nov. from the Oregon coast is described and illustrated. Mature individuals do not exceed 10 mm in length, have faint reddish-brown segmental pigment bands, small pulsatile vesicles, six pairs of testisacs and a well-developed seminal receptacle connected to the posterior portion of the bursa by paired tissue strands. The leech lacks eyes and ocelli.

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