Stenomacrus Forster 1869
Creators: name: Varga, Oleksandr
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Stenomacrus

description: Key to females of the Afrotropical species of Stenomacrus Förster, 1869
(including similar species of Chilocyrtus Townes, 1971)
1. Antenna with a white ring. Réunion ................................................................ S. payet Rousse, 2012
– Antenna without a white ring. Madagascar and African mainland .................................................. 2
2. Eye orbits with white spots on vertex. Madagascar ............... Chilocyrtus hortorum (Seyrig, 1934)
– Vertex entirely black. African mainland ........................................................................................... 3
3. Ovipositor long and upcurved, its sheath about 0.9 × as long as hind tibia (Fig. 8A). First metasomal tergite 1.2 × as long as its apical width, rugulose (Fig. 8I) .................................. S. valvator sp. nov.
– Ovipositor shorter, sheath at most 0.6 × as long as hind tibia (e.g., Figs 2A, 3A, 6A). First metasomal tergite 1.3–2.8 × as long as its apical width, with different sculpture, but not rugulose (e.g., Figs 2F, 9F) ..................................................................................................................................................... 4
4. Propodeum with lateromedian longitudinal carinae present.First tergite 1.3×as long as its apical width, sculptured only subapically (Fig. 4F). Pronotum longitudinally wrinkled (Fig. 4C). Temples 0.7 × the maximum diameter of eye in dorsal view, weakly narrowed (Fig. 4D) ....... S. glabratus sp. nov.
– Propodeum with lateromedian longitudinal carinae absent (e.g., Figs 2F, 3E). First tergite 1.4–2.8 × as long as its apical width, with different sculpture (e.g., Figs 2F, 9F). Pronotum with at most some wrinkles distally (e.g., Figs 7C, 9C). Temples at most 0.6 × the maximum diameter of eye in dorsal view, more strongly narrowed (e.g., Figs 2D, 5D, 7F) .................................................................... 5
5. Mesosoma ventrally yellow (Fig. 5C). Mesoscutum pubescent anteriorly (Fig. 5D). Face smooth (Fig. 5B). First metasomal tergite smooth and wrinkled (Fig. 5G) ........................ S. luteus sp. nov.
– Mesosoma with at most pronotum yellow/orange (Figs 2C, 6C). Other characters different .......... 6
6. First metasomal tergite 2.3–2.8 × as long as its apical width, longitudinally wrinkled (Figs 2F, 7G) ........................................................................................................................................................... 7
– If the first metasomal tergite longitudinally wrinkled, then at most 1.7 × as long as its apical width (Figs 3G–H) ...................................................................................................................................... 8
7. Face aciculate; clypeus convex, distinctly separated from face, yellow (Fig. 2B). Mesosoma not laterally compressed (Fig. 2D). Antenna with 27 flagellomeres ....................... S. clypeatus sp. nov.
– Face smooth; clypeus flat, not separated from face, the same colour as face (Fig. 7B). Mesosoma laterally compressed (Fig. 7D). Antenna with 19–20 flagellomeres ................ S. scutellaris sp. nov.
8. First metasomal tergite evenly longitudinally wrinkled on smooth background.Second tergite wrinkled at least on basal 0.5 (Figs 3G–H). Antenna with 18–19 flagellomeres ............. S. communis sp. nov.
– First metasomal tergite with at most single wrinkles on granulate background. Second tergite sculptured at most on basal 0.2 (Figs 6G, 9F). Antenna with 20–22 flagellomeres ......................... 9
9. First metasomal tergite 1.4 × as long as its apical width, with latero-median longitudinal carinae and wrinkles present distally (Fig. 6G). Pronotum distinctly paler than the rest of mesosoma (Fig. 6C) ............................................................................................................ S. pronotalis sp. nov.
– First metasomal tergite 1.9–2.0 × as long as its apical width, with latero-median longitudinal carinae and wrinkles indistinct (Fig. 9F). Pronotum with at most yellow distal marks (Fig. 9C) .................. ........................................................................................................................... S. vuriaensis sp. nov.
description: Published as part of Varga, Oleksandr, 2024, Review of the genus Stenomacrus Förster, 1869 (Hymenoptera: Ichneumonidae: Orthocentrinae) from Kenya and Burundi: a first step to understanding the diversity of the genus in the Afrotropics, pp. 177-202 in European Journal of Taxonomy 958 on pages 179-180, DOI: 10.5852/ejt.2024.958.2669, http://zenodo.org/record/13903208