Chrysoctonus, Mathot, 1966

Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2020, Illustrated key to genera and catalogue of Mymaridae (Hymenoptera) in America north of Mexico, Zootaxa 4773 (3), pp. 1-411 : 115

CHRYSOCTONUS Mathot, 1966

( Figs 274–278 )

Chrysoctonus Mathot, 1966: 224 . Type species: Chrysoctonus apterus Mathot, 1966 , by monotypy.

Myrmecomymar Yoshimoto, 1990: 28 . Type species: Myrmecomymar masneri Yoshimoto, 1990 , by original designation. Synonymy by Huber & Triapitsyn, 2015: 80.

Diagnosis. Body length 425–675 μm (females); 365–605 (males). Wingless ( Figs 274 , 276 ); ocelli absent ( Fig. 276b ); metasoma short, higher than wide, with pronotum, mesoscutum and scutellum all about equal in length, with an almost 90° angle between mesoscutum and scutellum, and scutellum almost in line with propodeum ( Figs 274 , 276 ). Male fully winged, with venation extending almost 0.6× fore wing length ( Fig. 275 ); flagellum with each funicle segment several times as long as wide ( Fig. 278 ).

Discussion. Among genera with 5-segmented tarsi, Chrysoctonus appears to be most closely related to Arescon , which also has a long fore wing venation. Unlike Arescon , and most other Mymaridae , the number of funicle segments in females is variable, ranging from four to eight but usually five in Nearctic species.

Important reference. Huber & Triapitsyn (2015).

Figures

FIGURES 274, 275. Chrysoctonus sp., habitus. USA, Florida, Alachua Co., Gainesville, AEI, 29°35'53"N 82°21'54"W, 8– 25.x.2003, D.B. Wahl. 274, female; 275, male. Scale bars=500 μm.

FIGURES 276–278. Chrysoctonus masneri (Yoshimoto). 276a, female habitus, lateral; 276b, female head, internal showing ocular apodeme; 277a, male head, lateral; 277b, male head, lateral (internal) showing ocular apodeme; 278, male head, lateral + antenna. Scale bars: 276a, 278=500 μm; 276b, 277=100 μm.