Cryptorhynchinae, Schoenherr, 1825

Chamorro, M. Lourdes & Presnall, Tara Milovana, 2022, Randersonia Chamorro, a new genus with two new species of North American Cryptorhynchinae (Coleoptera: Curculionidae), Zootaxa 5222 (6), pp. 591-599 : 597

Amended key for Cryptorhynchinae of U.S.A. (modified from Anderson (2002:40) to include Randersonia)

6(3). Metasternum short, the distance between middle and hind coxae distinctly shorter than length of antennal club............ 7

– Metasternum long, the distance between middle and hind coxae subequal to or distinctly longer than length of antennal club................................................................................................... 15

15(6). Pronotum markedly produced over head, head not visible in dorsal view; tibia very short, less than one-half as long as femur; hind tibia with or without apical comb of stout setae;....................................................... 15b

– Pronotum not produced over head, head visible in dorsal view; tibia longer than one-half length of femur; hind tibia with apical comb of stout setae (usually arranged subparallel to long axis of tibia);.......................................... 16

15b (15). Hind tibia without apical comb of stout setae; integument clothed in grey and black or variously colored, tightly arranged scales obscuring underlying cuticle, scattered plumose scales absent, scutellum and humeri prominent; disk not distinctly punctate; interstriae elevated, metanepisternal suture distinct and wings present; longitudinal elytral striae with each puncture shallow, diameter less than space between punctures…............................................. Paracamptus

–- Hind tibia with apical comb of stout setae; integument straw colored, visible, mostly glabrous, not clothed in dense scales, scattered plumose scales present, scutellum may or may not be visible and humeri not or weakly developed; interstriae not elevated, metanepisternal suture covered by elytra; longitudinal elytral striae with each puncture deep, diameter equal to or greater than space between punctures.......................................................... ... Randersonia