Anophèles afro-tropicaux : 1. Descriptions d'espèces nouvelles et changements de statuts taxonomiques (Diptera : Culicidae)

International audienceopheles (Anopheles) okuensis, sp. n., le mâle d'An. deemingi Service récolté au Cameroun ainsi que la femelle d'Anopheles (Celiia) comorensis, sp. n. capturée sur l'île de Mayotte (Archipel des Comores). Ils remettent en cause le statut taxonomique d'An. upemba Lips et proposent d'élever au rang d'espèce An. dureni dureni Edwards et An. dureni miliecampsi Lips. Abstract. - Afrotropical Anopheles. I. - Description of new species and modifications of taxonomical status (Diptera : Culicidae)

Flip-flop detachment tectonics at nascent passive margins in SE Afar

International audienceWe propose a two-stage tectonic evolution of SE Afar in Djibouti leading to the complex development of highly asymmetric conjugate margins. From c. 8.5 to c. 2 Ma, an early mafic crust developed, associated in the upper crust with synmagmatic growth faults dipping dominantly to the SW. After an erosional stage, a new detachment fault system developed from c. 2 Ma with an opposite sense of motion (i.e. to the NE), during an amagmatic extensional event. In the Asal area, break-up occurred after c. 0.8 Ma along the footwall of an active secondary detachment fault rooted at depth above the lithospheric necking zone. This evolution suggests that flip-flop detachment tectonics is developed during extension at passive margins, in connection with the dynamics of the melting mantle and the associated magma plumbing of the crust