A new species of Olixon Cameron, 1887 (Hymenoptera, Rhopalosomatidae) from southeastern Brazil
DOI:
https://doi.org/10.11606/1807-0205/2026.66.011Keywords:
Vespoidea, Cricket leeches, TaxonomyAbstract
A new species of the brachypterous wasp genus Olixon Cameron, 1887 is described and illustrated from southeastern Brazil. Olixon pluviatenuis sp. nov. is described based on a single male specimen collected in the Oswaldo Cruz Botanical Garden, São Paulo, representing the first record of the genus for the state of São Paulo. The new species is diagnosed and differentiated from its congeners, particularly the morphologically similar O. melinsula. Key distinguishing characters include the forewings extremely short and not expanded, with only one thick costal vein, and hindwings are entirely absent, a condition previously unreported from the New World fauna. This discovery increases the number of known Olixon species in Brazil to four and highlights the value of entomological collections in revealing hidden diversity, even in urban fragments.
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Copyright (c) 2026 Rogério Botion Lopes, Mayara Medeiros Bulbol
This work is licensed under a Creative Commons Attribution 4.0 International License.
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Funding data
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Fundação de Amparo à Pesquisa do Estado de São Paulo
Grant numbers 2021/00766-0;2020/07895-7;2019/09215-6 -
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Grant numbers 8887.806551/2023-00
