Olixon Cameron 1887
Creators: name: Celante, Gabriel Luiz
name: Carvalho, Adhan Gabriel
name: Martins, André Luis
name: Bulbol, Mayara Medeiros
name: Brito, Amaury Soares De
name: Teodoro, Adenir Vieira
name: Jahyny, Benoit Jean Bernard
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Rhopalosomatidae
Olixon

description: Updated key for the New Word species of Olixon
(modified from Bulbol et al. (2023a))
1. Malar space with sulcus from eye to mandible.............................................................. 2
– Malar space without sulcus............................................................................. 6
2. T 1 with median sulcus posterior to transverse carina (northern Argentina)........ O. bicolor Roig Alsina & Martínez, 2010
– T 1 without median sulcus posterior to transverse carina...................................................... 3
3. Temple length about width of scape (southeastern USA and Paraguay)............... O. melinsula Lohrmann et al., 2012
– Temple length less than half width of scape................................................................. 4
4. Propodeum posteromedially without process between posterolateral processes; volsella with few bristles on the membrane that unites them.—Penis valve narrow, space between head of penis valve and preapical process smooth; color varies from bright stramineous to brown; head, meso- and metasoma (except for darker marking on metasomal segment II) of same color; (Arizona to northern Argentina).................................................. O. testaceum Cameron, 1887
– Propodeum with one or two posteromedian processes between posterolateral process; volsella with bristles all over the membrane that joins both and at the apex of each one........................................................ 5
5. Posteromedian process without protuberance; penis valve, margin between the head of penis valve and the second pre-apical process slightly concave (northeastern Brazil)............................ O. caju Celante, Martins & Bulbol, sp. nov.
– Posteromedian process bilobed; penis valve, margin between the head of penis valve and preapical process with a bulging dimple; (midwestern Brazil)................................ O. pantanensis Bulbol, Bartholomay & Somavilla, 2023
6. Metasoma dark brown to black; transverse carina on T 1 evenly arched (Colombia)............................................................................................... O. atlanticum Fernández & Sarmiento-M., 2002
– Metasoma brownish; transverse carina on T 1 forming a narrow posterad angle on midline (southeastern Canada, eastern USA, and northern Mexico).............................................................. O. banksii (Brues, 1922)
description: Published as part of Celante, Gabriel Luiz, Carvalho, Adhan Gabriel, Martins, André Luis, Bulbol, Mayara Medeiros, Brito, Amaury Soares De, Teodoro, Adenir Vieira & Jahyny, Benoit Jean Bernard, 2025, Contributions to the knowledge of Olixon Cameron, 1887 (Hymenoptera, Rhopalosomatidae): a new species and new records of the genus for northeastern Brazil, pp. 549-562 in Zootaxa 5570 (3) on page 559, DOI: 10.11646/zootaxa.5570.3.6, http://zenodo.org/record/14745431