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First report of groundwater fauna from Papua New Guinea: Kinnecaris Jakobi, 1972 redefined (Copepoda, Harpacticoida, Parastenocarididae), and description of a new species

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The groundwater fauna of Papua New Guinea is completely unknown. The first member of this fauna is reported here. It is a new species of Parastenocarididae that agrees in eleven characters with 16 known species. Of these characters at least one (the powerful, prehensile antennule of the male) can be regarded as an autapomorphy of this group of species. Likewise, the arrangement of setae on the furcal rami and the conspicuous triangular and plate-like fifth leg may qualify as such. Two of Jakobi's (1972) genera have type species that fall into this particular group of species, viz., Kinnecaris and Cafferocaris.Cafferocaris is synonymized here with Kinnecaris, which is a monophylum including not only the type species K. forficulata but also 15 additional species, together with the new one from Papua New Guinea, Kinnecaris giselae sp. n. The genus Kinnecaris Jakobi, 1972 is redefined. Its species occur all along the eastern side of Africa from Ethiopia down to South Africa, but also in West Africa. Others are known from Madagascar, India, Western Australia, and Papua New Guinea. Die Grundwasserfauna Papua Neuguineas ist völlig unerforscht. Ein erster Vertreter dieser Fauna wird hier vorgestellt. Es handelt sich um eine neue Art der Parastenocarididae, die in elf Merkmalen mit 16 bekannten Arten übereinstimmt. Zumindest eines dieser Merkmale (die kräftig prähensile Antennula des Männchens) kann als mögliche Autapomorphie der Artengruppe betrachtet werden. Auch die Anordnung der Borsten auf den Furkalästen und die auffälligen, dreieckigen und plattenähnlichen 5. Beine könnten als solche in Frage kommen. Zwei von Jakobis (1972) Gattungen haben Typusarten, die zu dieser Artengruppe gehören, nämlich Kinnecaris und Cafferocaris. Cafferocaris wird hier mit Kinnecaris synonymisiert, die als ein Monophylum neben der Typusart K. forficulata 15 weitere Arten und die neue aus Papua Neuguinea, Kinnecaris giselae sp. n., umfasst. Die Gattung Kinnecaris Jakobi, 1972 wird neu definiert. Ihre Arten kommen entlang der gesamten Ostseite Afrikas von Äthiopien bis hinunter nach Südafrika, aber auch in Westafrika vor. Weitere Arten sind von Madagaskar, aus Indien, Westaustralien und Papua Neuguinea bekannt.

Affiliations: 1: Institut für Biologie und Umweltwissenschaften, Fakultät V, Universität Oldenburg, Postfach 2503, D-26111 Oldenburg, Germany


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