Anuretes grandis sp n., a caligid copepod (Siphonostomatoida) parasitic onDiagramma pictum (Pisces) in Taiwan, with discussion of Anuretes Heller, 1865

A new species of caligid copepod (Siphonostomatoida), Anuretes grandis sp. n., parasitic on the painted sweetlips [Diagramma pictum (Thunberg)] in Tai wan is described. The new species is distinguished from its congeners by ha ving: (1) free margin of cephalothorax not covering fourth pediger, (2) lar ge genital complex longer than 2/3 of the cephalic shield, (3) no maxillary whip, (4) leg 3 with 9 setae on the terminal segment of exopod and 8 plumo se setae on the terminal segment of endopod, and (5) armature of I,III on l eg 4 exopod. Genus Anuretes Heller, 1865 is reviewed and redefined. Based o n the new diagnosis three species (A. chelatus Prabha et Pillai, A. feddern i Price and A. parvulus Wilson) were transferred to Pseudanuretes, and two species (A. furcatus Capart and A. renalis Heegaard) were transferred to Le peophtheirus. In addition, the following three species of caligids were tra nsferred to Anuretes: Lepeophtheirus fallolunulus Lewis, Heniochophilus ind icus Pillai, and Lepeophtheirus rotundigenitalis Prabha et Pillai. The latt er is renamed Anuretes occultus nom. n. due to the homonym encountered thro ugh this transfer. "Anuretes plectorhynchi Yamaguti" reported by Prabha and Pillai (1986) is renamed Anuretes similis sp. n. and Anuretes yamagutii Pr abha et Pillai is relegated to the synonym of Anuretes anomalus Pillai. A k ey to the 18 species of Anuretes is provided.