Allandrus brevicornis Frost

Janicki, Julia & Young, Daniel K., 2017, Nemonychidae and Anthribidae of Wisconsin (Coleoptera: Curculionoidea), Insecta Mundi 2017 (579), pp. 1-36 : 10

Allandrus brevicornis Frost

(Fig. 11–12)

Allandrus brevicornis Frost 1920: 252 .

Description. Length (head excluded) 2.3–2.9 mm. Body elongate. Integument black. Vestiture consisting of a mixture of white, light brown, and dark brown to black setae. Rostrum with punctures as on frons, that of male with elevated longitudinal carina, carina of female not distinctly elevated. Frons convex, broad, punctate, surface granulate between punctures. Eyes entire, slightly oval. Pronotum about as wide as long, widest at lateral extension of transverse carina, transverse carina antebasal, strongly, sharply elevated, rather strongly emarginate; disc convex, surface even and very weakly impressed before middle, with dense, deep punctures that are reticulate internally. Elytral length 1.4X width, 2.0X pronotal length; surface with distinct, elevated basal swelling on each elytron, distinctly impressed behind swellings; striae with punctures moderate in size, deeply impressed; interstriae flat, densely and minutely punctate. Prothoracic tibiae of male straight. Pretarsus with claws cleft, inner tooth minute. Diagnosis. Allandrus brevicornis can be distinguished from other Allandrus species by the supra-scrobal carina that is absent or not surpassing the posterior margin of the scrobe, uneven elytral surface with strongly elevated swellings behind the elytral base, much lower rostral carina, and by and the straight prothoracic tibiae in males.