Anthribidae, Billberg, 1820

Janicki, Julia & Young, Daniel K., 2017, Nemonychidae and Anthribidae of Wisconsin (Coleoptera: Curculionoidea), Insecta Mundi 2017 (579), pp. 1-36 : 5-6

Key to the Wisconsin Genera of Anthribidae

1.

— Antennae inserted on anterior surface of the rostrum or head; antennal club never 4-segmented (Subfamily Choraginae Kirby ) .................................................................................................. 2

Antennae inserted on lateral or ventral surface of the rostrum or head; antennal club may be 4-segmented (Subfamily Anthribinae Billberg ) ....................................................................... 4 2(1).

— Eyes rounded, upper edges not closer to each other than lower edges (Tribe Araecerini Lacordaire ); lateral prothoracic carinae present, transverse pronotal carina basal ............... ............................................................................................................... Araecerus Schönherr

Eyes elongate-oval, upper edges closer to each other than lower edges (Tribe Choragini Kirby ); lateral and transverse prothoracic carinae variable ................................................................ 3 3(2).

—

Head not retractile into prothorax due to ocular width; pronotum with a raised reticulum forming a honey-comb pattern; size relatively larger ................................................ Choragus Kirby

Head capable of being retracted into prothorax; pronotum punctate but not raised reticulate; size relatively smaller ................................................................................. Euxenus LeConte

4(1).

— Mandibles each with a strongly toothed ventral cutting edge, as well as normal dorsal edge

(Tribe Cratoparini LeConte ) ................................................................. Euparius Schönherr Mandibles without a toothed ventral cutting edge ..................................................................... 5

5(4).

— Eyes entire, truncate, or finely sinuate on anterior margin ....................................................... 6 Eyes strongly emarginate on anterior margin (very subtle in Anthribus ) .............................. 10 6(5).

—

Entire face with conspicuous, white pubescence; pronotal disc with a pit or groove; elytra each with a conspicuous patch or band of white pubescence (Tribe Tropiderini Lacordaire ) ........ 7

White pubescence, if present on face, confined to spots, if conspicuous; pronotum with disc concave, with a central swelling; elytra with multiple tufts of erect setae ............................ 8

7(6).

—

Pronotum with a smooth, longitudinal, shallow groove from central pit to central carina; elytra each with a pale antemedial patch, not reaching lateral margins ....... Gonotropis LeConte

Pronotum with a sinuous, transverse, median groove; elytra each with a pale postmedial band that reaches lateral margins ................................................................. Eurymycter LeConte

8(6).

— Eyes finely faceted, with> 26 facet rows across maximum width ............................................. 9 Eyes coarsely faceted, with ≤ 26 rows across maximum width (Tribe Piesocorynini Valentine )

................................................................................................................. Piesocorynus Dejean 9(8).

—

Fusion of rostrum with venter of head capsule forming a broad curve; rostrum long, flattened and apically flared; antennae without whorls of long, erect setae; minimum interocular distance greater than minimum width of rostrum near base (Tribe Allandrini ) ................................... ................................................................................................................... Allandrus LeConte

Fusion of rostrum with venter of head capsule indicated by a transverse groove or abrupt angle; rostrum shorter, not apically flared; interocular distance not greater than minimum width of rostrum (Tribe Platyrhinini ) .................................................................. Goniocloeus Jordan

10(5).

— All 3 rd tarsomeres with lobes fused along midline (Tribe Anthribini ) ...... Anthribus Geoffroy All 3 rd tarsomeres with lobes separate ....................................................................................... 11

11(10). Rostrum, excluding mandibles, narrowed from base to apex; rostral apex with central 1/3 longer than sides (Tribe Trogonorhinini ) ................................................ Trigonorhinus Wollaston

— Rostrum quadrate or apically widened; rostral apex not narrower than base and not prolonged medially (Tribe Zygaenodini ) .................................................................................................. 12

12(11). Transverse pronotal carina clearly antebasal, incapable of contacting elytral base; pronotal hind angles not projecting laterad the humerae ............................... Ormiscus Waterhouse

— Transverse pronotal carina sub-basal or basal, capable of contacting elytral base at some point; pronotal hind angles often projecting laterad the humerae .................. Eusphyrus LeConte