GLADIOFERENS HENRY (COPEPODA, CALANOIDA) DISCOVERED IN ANTARCTICA - G-ANTARCTICUS SP-NOV DESCRIBED FROM A LAKE IN THE BUNGER HILLS

A new species of Gladioferens is described from a freshwater lake in t he Bunger Hills, Greater Antarctica. A key to the six species of Gladi oferens is provided for both sexes. Most species of the subgenus conta ining G. antarcticus sp. nov. are remarkable in possessing asymmetries in the second legs (male) and fourth legs (female). This suggests tha t the mating behaviour of these species may be radically different fro m that in most heterarthrandrian calanoids and calls for further study . However, G. antarcticus is more primitive than its consubgeners in h aving, in the male, symmetrical second legs and 3-segmented endopods i n the fifth legs. The genus shows a highly disjunct distribution (Aust ralia, New Zealand and Bunger Hills) and its biogeography is now of ou tstanding interest.