Xyela julii

Blank, Stephan M., Shinohara, Akihiko & Altenhofer, Ewald, 2013, <strong> The Eurasian species of <em> Xyela </ em> (Hymenoptera, Xyelidae): taxonomy, host plants and distribution </ strong>, Zootaxa 3629 (1), pp. 1-106 : 34

Xyela julii group

Diagnosis. Ventral edge of ovipositor sheath straight or slightly curved downwards in species with long ovipositor, tip knife-shaped with dorsal edge sloping down and ventral edge almost straight ( Figs 105–117 ), sensilla field with 3–4 setae ( Fig. 94 ); valvula 1 distally with 12–14 oblique, closely spaced annuli (similar to Fig. 94 ); lateral lamella of valviceps oblique, medial lobe strikingly protruding above proximal and distal lobes ( Figs 141–152 ).

Species included. Xyela altenhoferi , X. graeca , X. heldreichii , X. julii , X. menelaus , X. obscura and X. uncinatae in the West Palearctic, X. densiflorae , X. julii , X. par, X. pumilae , X. sinicola , X. tecta , X. variegata in East Asia, and an unidentified species similar to X. par in Vietnam ( Blank et al. 2005).

Figures

FIGURES 105–120. Ovipositor sheaths of Xyela species. All figures at same scale. Legend: HT—holotype; NT—neotype; PT—paratype.

FIGURES 86–94. Ovipositor sheath, sensilla pattern and sensilla plate (spl) at the apex of the ovipositor sheath. 86, Xyela helvetica. 87, X. longula, arrows indicate the modified hairs at apex of valvula 1. 88, X. lugdunensis. 89, X. meridionalis. 90–91, X. alpigena. 92–93, X. curva. 94, X. densiflorae.

FIGURES 136–145. Penis valves of Xyela species: X. curva group, X. julii group (part). Figs 138–139 and 141 reproduced from Blank et al. (2005).

FIGURES 146–156. Penis valves of Xyela species (X. julii group, part), and male external copulatory apparatus of Xyela in ventral and lateral view. 153–154, X. longula (penis valves removed). 155–156, X. curva (penis valves and volsellae removed). Legend: bpa—basiparamere, br—basal ring, gon—gonomacula, har—harpe, lap—lateral apodeme, vol—volsella. Figs 147, 150 and 152 reproduced from Blank et al. (2005).