Abstract
Two species of caligid copepods, Lepeophtheirus atypicus n. sp. and Caligus oviceps Shiino, 1952, are described based on the specimens obtained from moribund rabbit fish (Siganus fuscescens) cultured in a cage-net at the Penghus Hatchery Station on Pescadores Island, Taiwan. The new species bears close resemblance to L. goniistii Yamaguti, 1936, but can be easily distinguished from it by the armature on leg 3. The antennule, sternal furca, and leg 4 of these two species also exhibit difference. Lepeophtheirus species from rabbit fish in Japan reported as L. goniistii by Shiino (1952) is reidentified as L. atypicus n. sp. Caligus truncatogenitalis Roubal, 1981 is proposed to be relegated to the synonym of C. oviceps.
