Revision of Pycnandra subgenus Sebertia (Sapotaceae) and a generic key to the family in New Caledonia

The satellite genus Sebertia (Sapotaceae, Chrysophylloideae) in New Caledonia is here recognized as Pycnandra subgenus Sebertia, a group comprising only two species. Pycnandra canaliculata is described and illustrated as new from the south part of Grande Terre where it occurs in maquis vegetation and humid forest on ultramafic soils, often along watercourses. This species is well known among many biologists but misidentified until now as Sebertia gatopensis, a synonym of P. blanchonii that resides in northwest Grande Terre. In New Caledonia, Pycnandra is the only sapotaceous genus with flowers that lack staminodes and Pycnandra subgenus Sebertia is characterized by small white flowers and fruits lacking stylar remnants. The fruits are characteristic with a scale-like epidermis that is translucent and peels off in P. acuminata versus brown and persistent in P canaliculata. Using field data and applying IUCN criteria, we assess the preliminary threat as Least Concern (LC) for P. acuminata and Vulnerable (VU) for P. canaliculata

Novitates neocaledonicae III : a new species of Citronella (Cardiopteridaceae) endemic to New Caledonia

A new species of Cardiopteridaceae, Citronella hirsuta, endemic to the east-central part of New Caledonia's main island, Grande Terre, distinguished on the basis of morphological evidence, is described and illustrated. This new species is distinguished by its densely hirsute leaves, while the two others species of Citronella occurring in New Caledonia have glabrous leaves. Citronella hirsuta is restricted to ultramafic substrate, and only known from areas that are situated within mining concessions. A preliminarily IUCN conservation status of Endangered (EN) is proposed

Les Austronomia Michener, 1965 de Nouvelle-Calédonie et de l'archipel du Vanuatu (Hymenoptera : Apoidea : Halictidae : Nomiinae)

Six espèces d'Austronomia Michener, 1965 sont inventoriées de Nouvelle-Calédonie et de l'archipel du Vanuatu. Trois d'entre elles sont nouvelles : A. doensis sp. nov. et A. neocaledonica sp. nov. de la Grande-Terre en Nouvelle-Calédonie, A. loyali sp. nov. des îles Loyauté (NC) et de l'archipel du Vanuatu

Les abeilles du genre Homalictus Cockerell, 1919 en Nouvelle-Calédonie (Hymenoptera : Apoidea : Halictidae)

Dix espèces de Homalictus Cockerell, 1919 sont inventoriées de Nouvelle-Calédonie, dont sept sont nouvelles : Homalictus curvistriae Donovan & Pauly, H. heliotropiae Pauly & Donovan, H. hienghenensis Donovan & Pauly, H. koghiensis Donovan & Pauly, H. mcphersoni Donovan & Pauly, H. melanasiae Donovan & Pauly, H. projectio Donovan & Pauly. Le mâle de Homalictus cocos Pauly & Munzinger 2003 est décrit pour la première fois