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Article Dans Une Revue Taxonomy Année : 2023

Description of a Highly Modified Endemic Ground Beetle (Coleoptera, Carabidae) from the Oceanic Island of Malpelo, Colombia

Anderson Arenas-Clavijo
Mateo López-Victoria

Résumé

The oceanic island of Malpelo, 380 km west of the Colombian mainland, stands out from other islands of the Tropical Eastern Pacific by its harsh environment and depauperate flora and fauna, thus imposing strong selective pressure on the small number of invertebrates that inhabit it. The endemic taxon described here, Dyscolus (Cacothrix) malpelensis, n. subgen., n. sp. (Carabidae, Platynini), is a remarkable example of adaptation to this unique ecosystem. The modifications of its body shape, including a tight coaptation of elytra and pronotum, might be a response to strong environmental constraints, from predation by lizards and land crabs to the absence of deep soil that forces the beetle to seek shelter in caves and rock crevices.
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hal-04383634 , version 1 (09-01-2024)

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Pierre Moret, Anderson Arenas-Clavijo, Mateo López-Victoria. Description of a Highly Modified Endemic Ground Beetle (Coleoptera, Carabidae) from the Oceanic Island of Malpelo, Colombia. Taxonomy, 2023, 3 (4), pp.496-508. ⟨10.3390/taxonomy3040028⟩. ⟨hal-04383634⟩
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