Abstract

The ichneumonid subfamily Eucerotinae has been thought to be almost absent from the tropics, with the only known Afrotropical species found in Madagascar. We report the subfamily to be present in the mainland Afrotropics, and describe a new species, Euceros species 1 from Uganda and Cameroon (name not yet shown in preprint). The subfamily had likely not been observed in the mainland Afrotropics before due to low abundances and insufficient sampling. More Eucerotinae likely remain to be discovered in tropical Africa and Asia, although tropical America may genuinely have few eucerotine species. Much more extensive sampling will be needed before it is possible to make confident estimates of how eucerotine diversity is distributed globally. ### Competing Interest Statement The authors have declared no competing interest. Alfred Kordelin Foundation, https://ror.org/0107h6s84 Entomological Society of Finland Finnish Cultural Foundation, https://ror.org/027xav248 Oskar Öflund Foundation, https://ror.org/0446gjc92 Svensk-Österbottniska Samfundet Waldemar von Frenckells Stiftelse, https://ror.org/030yben02 Fundação de Amparo à Pesquisa do Estado do Amazonas, https://ror.org/026d6ma13, 88887.806552/2023-0, 88881.126557/2025-01 Fundação de Amparo à Pesquisa do Estado do Amazonas, https://ror.org/026d6ma13 Ministry of Culture of the Czech Republic Deutsche Forschungsgemeinschaft, DFG–530224000