Two new genera of Tantulocarida (Crustacea) infesting asellote isopods and siphonostomatoid copepods from western Japan.

Describes two new species representing a genera of tantulocaridans (Crustacea) infesting asellote isopods and siphonostomatoid copepods from western Japan. Paradoryphallohora inusitata; Hypertantalus siphonicola; Parasite and host; First record of tantulocaridans on a representative of the copepod order Siphonostomatoida; First case presumed hyperparasitism recorded in the group.