Tyloceridius Malaise, 1945

Wei, Meicai, Niu, Gengyun & Taeger, Andreas, 2014, A second species of Tyloceridius Malaise (Hymenoptera, Tenthredinidae), ZooKeys 396, pp. 55-65 : 56-57

Tyloceridius Malaise, 1945

Tyloceridius Malaise, 1945: 171. Type species: Allantus dorsatus Mocsáry, 1883, by original designation.

Diagnosis.

Distinguished from other genera of Tenthredininae by deep furrow on ventral side of antennal flagellum and the very large, protruding and isolated supra-antennal tubercles.

Description.

Body robust (Figs 1, 8). Clypeus transversely subconvex at basal third, anterior margin sharp, quarter-circularly incised with acute lateral teeth; apical third of labrum deflexed, and labrum thus truncate at apex in front view (Figs 5, 11); mandibles strongly bent at apical third, asymmetric (Figs 2, 3), right one with 1 basal tooth, 3 inner teeth; one of them placed on the dorsal side (Fig. 3); left mandible with 1 basal tooth and 2 inner teeth, without dorsal tooth (Fig. 2); malar space longer than diameter of median ocellus; inner margins of eyes very feebly S-curved and converging downwards, distance between eyes much longer than height of eye (Figs 5, 11); supra-antennal tubercles large, highly elevated and quite free-standing (Figs 4, 10, 12); head elongated behind eyes, occipital carina low but distinct; interocellar furrow broad and deep, postocellar furrow broad and shallow. Antennae stout and uniformly thick; 2nd antennomere about as long as broad, flagellum with a very deep and sharp longitudinal furrow along the outer-side from apex of the 3rd antennomere to 9th antennomere, 3rd antennomere distinctly longer than 4th (Figs 6, 9). Anterior lobe of pronotum broad, without marginal carina, with broadest part about 3 × diameter of an ocellus; ventral margins of propleura narrowly but distinctly meeting; mesoscutellum flattened, mesoscutellar appendage with an obtuse middle ridge. anterior basin of metascutellum narrow, furrow like; dorsal lobe of metepimeron long and linear; mesosternal thorns wanting; posterior corner of metepimeron round, without appendage. Basal plates (first tergite) of abdomen contiguous on meson, without large membranous blotch (Fig. 8). Inner tibial spur of fore leg bifurcate at apex; hind coxa small, hind femur not reaching apex of abdomen, distinctly shorter than hind tibia, hind tibial spur shorter than half length of metabasitarsus; metabasitarsus about as long as or slightly longer than following 3 tarsomeres together; claw cleft, inner tooth shorter than outer tooth. Venation similar to Tenthredo , anal cell of forewing with a short and erect cross vein at basal 2/5; hind wing with 2 closed middle cells, anal cell sessile or shortly petiolate (Figs 1, 8).

Distribution.

Himalaya: China (Tibet), India (Jammu & Kashmir, Uttaranchal, Himachal Pradesh), Nepal, Pakistan (Islamabad).

Key to species