Two new species of the family Pontellidae (Copepoda, Calanoida) from Arguni Bay, Kaimana, West Papua, Indonesia, with notes on their species-groups

Abstract

Two new species of the family Pontellidae, Labidocera kaimanaensis and Pontella papuaensis, are described and illustrated from specimens collected in Arguni Bay, West Papua, Indonesia. L. kaimanaensis belongs to the L. detruncata species-group, is distinguishable from other species of this group by the very elongated Ur1 (urosomite 1) and the asymmetrical P5 in the female and the Pdg5 (pediger 5) and P5 in the male. P. papuaensis does not belong to any of the known five groups of Indo-West Pacific Pontella, in having Ur1 with a beak-like posterodorsal process and almost symmetrical Re’s (exopods) of P5 in the female, a rostrum with double convex lenses, the chela of the right P5 with a bilobed thumb, and the inner margin of that chela armed with a large process, in the male. The establishment of four new species-sub-groups of L. detruncata, i.e., L. d.-cervi, L. d.-farrani, L. d.-kaimanaensis, and L. d.-sinilobata, as well as the establishment of a P. papuaensis species-group, are proposed. Two new species of the family Pontellidae, Labidocera kaimanaensis and Pontella papuaensis, are described and illustrated from specimens collected in Arguni Bay, West Papua, Indonesia. L. kaimanaensis belongs to the L. detruncata species-group, is distinguishable from other species of this group by the very elongated Ur1 (urosomite 1) and the asymmetrical P5 in the female and the Pdg5 (pediger 5) and P5 in the male. P. papuaensis does not belong to any of the known five groups of Indo-West Pacific Pontella, in having Ur1 with a beak-like posterodorsal process and almost symmetrical Re’s (exopods) of P5 in the female, a rostrum with double convex lenses, the chela of the right P5 with a bilobed thumb, and the inner margin of that chela armed with a large process, in the male. The establishment of four new species-sub-groups of L. detruncata, i.e., L. d.-cervi, L. d.-farrani, L. d.-kaimanaensis, and L. d.-sinilobata, as well as the establishment of a P. papuaensis species-group, are proposed.