Piesocorynus mixtus LeConte

Janicki, Julia & Young, Daniel K., 2017, Nemonychidae and Anthribidae of Wisconsin (Coleoptera: Curculionoidea), Insecta Mundi 2017 (579), pp. 1-36 : 15-16

Piesocorynus mixtus LeConte

(Fig. 19–20)

Piesocorynus mixtus LeConte 1876 .

Description. Length 4.7–6.0 mm. Body oblong, cylindrical. Integument brown. Vestiture consisting of short, brown, grey or dull yellow setae, the latter predominantly on elytra, grey setae forming large patch on head and small spots on alternate elytral interstriae; legs with grey annulations. Antennae slender, joints of club subequal in length, 10 th and 11 th antennomeres slightly shorter than 9th. Head densely punctate. Rostrum prolonged, broad, slightly widening apically, widest at apex. Antennae 11-segmented, distal three segments forming a club. Eyes coarsely faceted, with 14–24 longitudinal rows of facets. Pronotum widest at base, converging apically, surface densely punctate. Elytra with striae with deep, close-set punctures; interstriae 2–3 with obtuse elevation on basal 1/4; surface tessellate. Tibiae annulated, with 2–3 lighter patches and two darker patches. Tarsomere two of all three pairs of legs with setae extended apically towards tarsomere three. Pretarsus with each claw possessing a small basal tooth.

Diagnosis. Piesocorynus mixtus can be distinguished from P. moestus by the yellow or brown elytral pubescence and by the greyish basitarsi. It can be distinguished from other Piesocorynus species by the long and slender tarsi, tessellate brown or black elytral interstriae 1–2, the mesothoracic basitarsi of male usually with an anterioventral tubercle or a long spine, and by the minute median tooth on the 2 nd abdominal sternite.

Natural history. Adults and larvae of Nearctic species of Piesocorynus feed on pyrenomycete fungi of the order Sphaeriales , family Zylariaceae , genera Biscogniauxia , Camillea , Daldinia , and Hypoxylon ,

and family Diatrypaceae , genus Diatrype ( Valentine 1998) . Piesocorynus mixtus is also known to be attracted to light.

Phenology. The one Wisconsin specimen was collected in September.

Collecting methods. The single Wisconsin specimen examined during this study from Adams County represents a NEW STATE RECORD. It was collected at fluorescent light.