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Abstract
Two new species of ants (Hymenoptera: Formicidae) collected from New Caledonia are described and figured based on worker specimens: Leptogenys loarelae Ramage sp. nov. (Ponerinae, Ponerini) and Lioponera neocaledonica Jouault, Ramage & Perrichot sp. nov. (Dorylinae, Cerapachyini). All specimens were collected from the South Province of Grande Terre. These two new species are primarily distinguished from the other New Caledonian relatives by the size and shape of petiole for L. loarelae Ramage sp. nov. and by the presence of dorsolateral margins on the mesosoma for L. neocaledonica Jouault, Ramage & Perrichot sp. nov. Keys to New Caledonian Leptogenys and Lioponera are provided.
Highlights
New Caledonia, located in the southwest Pacific Ocean, is one of the 36 biodiversity hotspots identified worldwide by Conservation International (CEPF)
Leptogenys loarelae Ramage sp. nov. can be distinguished from other New Caledonia species of Leptogenys by the unique combination of the following features: integument smooth and shining, mostly black colored with blueish reflection; third antennal segment markedly elongate, more than twice the length of pedicel; mandible elongate, triangular; petiole elongate, nearly three times longer than broad in dorsal view
The new species described above were mostly collected along the trail from Sarraméa to the Plateau de Dogny, except the specimen collected from the Montagne des Sources
Summary
New Caledonia, located in the southwest Pacific Ocean, is one of the 36 biodiversity hotspots identified worldwide by Conservation International (CEPF). It is an archipelago comprising the main island of European Journal of Taxonomy 589: 1–14 (2019). Emery’s (1883) pioneer work on the ant fauna of New Caledonia resulted in the description of seven species. He was soon followed by André (1889) and Forel (1894) who added two and three species, respectively, and he himself described 37 additional species, most of them endemic to the archipelago (Emery 1914). Recent studies (Berman 2012; Berman & Andersen 2012; Berman et al 2013a, 2013b; Antwiki 2019) show many species remaining to be described
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