A NEW AND TWO KNOWN SPECIES OF HATSCHEKIA POCHE, 1902 (COPEPODA, SIPHONOSTOMATOIDA, HATSCHEKIIDAE) PARASITIC ON JAPANESE FISHES

摘要

Hatschekia laeopsi sp. nov., H. branchiostegi Yamaguti, 1939 and H. pagrosotni Yamaguti, 1939 are (re-)described based on specimens collected from the branchial lamellae of three Japanese fishes, Laeops kitaharae (Smith & Pope, 1906) (Pleuronectidae), Branchiostegus japonicus (Houttuyn, 1782) (Malacanthidae), and Dentex tutnifrons (Temminck & Schlegel, 1843) (Sparidae), respectively. The free-living stages of H. branchiostegi are described for the species for the first time.