Abstract
Madagascar is a well-known hotspot of biodiversity. However, many Orthoptera, and especially the Tettigonioidea, belong to little-studied groups. Here we describe a new genus and species of bush-cricket reared from field-collected eggs.Paraplangiasinespeculogen. nov., sp. nov. belongs to Phaneropterinae and shares diagnostic characteristics with members of the tribe Amblycoryphini and its African subtribe Plangiina stat. nov.Paraplangia, which has a chromosome number of 31 X0, differs from other African members of the tribe and subtribe such asEurycoryphaandPlangia, which both have 29 X0. In addition to morphology, we describe the male calling song, female acoustic response, and mating behavior. As calling song, the male produces two series of short syllables. At the end of the second series the female responds with signals of similar duration and spectral composition as the male sounds (peak about 8-9 kHz). To make future identification easier, a key to all genera of Phaneropterinae found in Madagascar is presented.
Highlights
The island of Madagascar is well known for its richness of endemic species
We describe a new genus and species of bush-cricket reared from fieldcollected eggs
Paraplangia sinespeculo gen. nov., sp. nov. belongs to Phaneropterinae and shares diagnostic characteristics with members of the tribe Amblycoryphini and its African subtribe Plangiina stat. nov
Summary
The island of Madagascar is well known for its richness of endemic species. It is considered to be a very important hotspot of biodiversity due to several factors. Madagascar was formerly part of a continent (for a review see Vences et al 2009). It separated from Gondwana about 135 million years ago For some time Madagascar and India drifted north-eastwards together, until their connection broke (about 90 million years ago) and Madagascar remained isolated in the Indian Ocean. It was, never very far from Africa, and even non-flying mammals seem to have crossed this channel several times (Ali and Huber 2010). Even more groups, especially insect groups, are still nearly completely unstudied
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