Ooctonus, Haliday, 1833

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 : 267

OOCTONUS Haliday, 1833

( Figs 715–749 )

Ooctonus Haliday, 1833a: 268, 1833b: 343 . Type species: Ooctonus insignis Haliday, 1833 , by subsequent designation by Westwood, 1839: 78.

Sphecomicrus Walker, 1846: 18 , and Errata and Addenda: 50. Type species: Ooctonus insignis Haliday, 1833 , by subsequent designation by Peck, 1951: 410.

Diagnosis. Body length 690–1845 μm. Funicle 8-segmented; tarsi 5-segmented; face without subantennal sulci ( Figs 716 , 730 ); pronotum entire, not divided by median longitudinal sulcus ( Figs 723 , 739 ); fore wing with hypochaeta next to proximal macrochaeta ( Fig. 722 ); propodeum with diamond-like pattern of carinae, the incomplete median carina, costulae and plicae defining a central pentagonal areole and, sublaterally, several (usually 4) submedian areoles ( Figs 723 , 736, 740 ); petiole distinctly longer than wide ( Figs 726, 727 , 741, 742 , 744 ); gt 1 in lateral view usually as long as remaining terga together ( Fig. 744 ).

Discussion. Ooctonus is traditionally placed near the Gonatocerus group of genera but superficially resembles several genera in the Polynema group except for the obvious difference in number of antennal (in females) and tarsal segments. The position of the hypochaeta, close to the proximal macrochaeta is more similar to the latter group than to members of the Gonatocerus group.

Nearctic hosts. Hemiptera : Cercopidae .

Important reference. Huber (2012).

Figures

FIGURE 715. Ooctonus vulgatus Haliday, habitus. Canada, British Columbia, Victoria vicinity, 48°32'N 123°30'W, 248 m, 4–18.ix.2005, N. Winchester, rocky knoll, intact Manzanita/Arbutus. Scale bar=1000 μm.

FIGURES 716–720. Ooctonus spp., head except 720. 716, O. readae Huber, anterior; 717, O. readae Huber, posterior; 718a, O. hemipterus Haliday, lateral; 718b, O. hemipterus Haliday, lateral (internal) showing ocular apodeme; 719, O. occidentalis Whittaker, dorsal; 720, O. readae Huber, antenna. Scale bars=100 μm.

FIGURES 721–723. Ooctonus spp. 721, O. readae Huber, male antenna; 722, O. readae Huber, wings; 723, O. boltei Huber, mesosoma, dorsal. Scale bars=200 μm.

FIGURES 724–729. Ooctonus spp. 724, O. hemipterus Haliday, mesosoma, lateral; 725, O. silvensis Girault, ovipositor seen through gaster; 726, O. canadensis Whittaker, metasoma, dorsal; 727, O. readae Huber, metasoma, lateral; 728, O. canadensis Whittaker, genitalia seen through gaster; 729, O. silvensis Girault, genitalia seen through gaster. Scale bars 724–727=200 μm; 728, 729=100 μm;

FIGURES 730–735. Ooctonus hemipterus Haliday, head. 730, anterior; 731, posterior; 732, male, lateral; 733, dorsal; 734, ventral; 735, mouthparts. Scale bars=50 μm.

FIGURES 736–742. Ooctonus hemipterus Haliday, mesosoma, except 741, 742. 736, dorsal; 737, lateral; 738, ventral; 739, anterior; 740, metanotum + propodeum; 741, male petiole, dorsal; 742, petiole, lateral. Scale bars=50 μm.

FIGURES 743–749. Ooctonus hemipterus Haliday, male metasoma. 743, dorsal; 744, lateral; 745, ventral; 746, apex of gaster, dorsal; 747, apex of gaster, lateral; 748, apex of gaster, ventral; 749, apex of gaster, posterior. Scale bars: 743–745=50 μm; 746–749=20 μm.