Diversification in the Comoros: Review of the Laccophilus alluaudi Species Group with the Description of Four New Species (Coleoptera: Dytiscidae)

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Bergsten, J.; Biström, O. Diversification in the Comoros: Review of the Laccophilus alluaudi Species Group with the Description of Four New Species (Coleoptera: Dytiscidae). Diversity 2022, 14, 81.

Title: Diversification in the Comoros: Review of the Laccophilus alluaudi Species Group with the Description of Four New Species (Coleoptera: Dytiscidae)
Author: Bergsten, Johannes; Biström, Olof
Publisher: Multidisciplinary Digital Publishing Institute
Date: 2022-01-25
URI: http://hdl.handle.net/10138/340153
Abstract: The <i>Laccophilus alluaudi</i> species group is an interesting case of an endemic species radiation of Madagascar and the Comoros. To date, a single species, <i>Laccophilus tigrinus</i> Guignot, 1959 (Anjouan), is known from the Comoro Islands, with eight other species known from Madagascar. Here we review the <i>Laccophilus alluaudi</i> species group from the Comoro Islands based on partly new material. We recognize five species, out of which four are here described as new: <i>L. mohelicus</i> n. sp. (Moh&eacute;li), <i>L. denticulatus</i> n. sp. (Grande Comore), <i>L. michaelbalkei</i> n. sp. (Mayotte) and <i>L. mayottei</i> n. sp. (Mayotte). Based on morphology of male genitalia, we hypothesize that the five species form a monophyletic group and originated from a single colonization event from Madagascar. If confirmed, this would constitute one of the few examples of intra-archipelago diversification in the Comoros. The knowledge of species limits in relation to their distribution in the Comoros archipelago is also urgently needed in the face of rapid habitat degradation.


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