Agrilus humilis, Kerremans, 1895

Jendek, Eduard, 2017, Revision of the Agrilus humilis species-group (Coleoptera: Buprestidae: Agrilini) with description of thirteen new species from Southeastern Asia, Zootaxa 4363 (2), pp. 249-271 : 250

Agrilus humilis species–group

The group comprises small species (3.2–5.5 mm) of Southeast Asia ( Fig. 6 ) having body robust and cuneiform; prehumerus is long, carinal and arcuate, rarely absent; elytral apices are arcuate or subtruncate; metafemora are obviously incrassate; tarsi are relatively short; metatarsus is distinctly shorter than metatibia; metatarsomere 1 is shorter or subequal to metatarsomeres 2–3 combined; sternal groove on apex of last ventrite is obviously arcuately sinuate; sinuosity has angulate delimitation.

Females are uniform unlike males which possess distinctive characters on aedeagi and frequently also obvious sexual adaptations like dilated antennae or metatibiae, cluster of setae on apex of metatibiae, protrusions or impressions on basal ventrite or setal comb on margin of each ventrite.

Species of Agrilus humilis species–group are homomorphic with species of Agrilus sulcicollis species–group ( Jendek & Grebennikov 2011) by having sternal groove on apex of last ventrite obviously sinuate but the latter have prolonged body, longer tarsi and display different trends in sexual adaptations.

Figures

FIGURE 6. Geographical distribution of examined type and non type specimens of A. humilis species–group.