Orizabus mcclevei, Warner, 2011

Warner, William B., 2011, Review of the genus Orizabus Fairmaire in the United States of America (Coleoptera: Scarabaeidae: Dynastinae), Insecta Mundi 2011 (174), pp. 1-42 : 3-4

Key to Orizabus species of the United States of America

1. Clypeal carina usually entire, at most weakly emarginate in anterior view; protibia tridentate (when not worn) in both sexes with apex truncate to transversely rounded ( Fig. 5-7, 35); male genitalia with paramera relatively thin, laterally dentate ( Fig. 20, 21, 33, 34); body usually smaller (12 to 19 mm long), strongly convex, pyriform ........................................................... 2

— Clypeal carina usually obviously bidentate in anterior view (unless worn; Fig. 1, 2, 12, 13, 37); female protibia tridentate, with apex oblique ( Fig. 10, 37, 38); male with protibia blade-like, edentate ( Fig. 8, 9, 12, 36); male genitalia and shape different; body normally longer than 19 mm ............................................................................................................................................ 3

2(1). Clypeal carina apparently apical, in dorsal view often weakly angulate with angle opening anteriorly ( Fig. 6, 32); pronotum with posterior marginal bead more or less effaced and anterior marginal bead not angulately broadened at middle; antennal club as long as or shorter than distance between frontoclypeal tubercle and clypeal carina ( Fig. 6, 32); paramera with lateral tooth just anterior to middle, tooth often appressed ( Fig. 33, 34) ................... O. pyriformis (LeConte)

— Clypeal carina obviously subapical, in dorsal view straight ( Fig. 5); pronotum with posterior marginal bead complete or only shortly interrupted at middle, anterior marginal bead with posterior edge angularly broadened at middle; antennal club obviously longer than distance between clypeal carina and frontal tubercle ( Fig. 5); paramera with lateral tooth at about apical third ( Fig. 20, 21) ............................................................................ O. mcclevei new species

3(1). Posterior edge of anterior pronotal bead usually not posteriorly prolonged at midline, in females bead often slightly narrowed at midline ( Fig. 10); pronotal disc simply convex, without broad depression in anterior half ( Fig. 8); male paramera with apex incised ( Fig. 30); length usually less than 22 mm ............................................................................ O. pinalicus new species

— Posterior edge of anterior pronotal bead in male posteriorly prolonged at midline into triangular tubercle ( Fig. 1, 3, 36), in female usually at least obtusely angulate (bead medially broader; Fig. 37, 38); pronotal disc often with broad depression behind tubercle (lacking in most females); male paramera without apical incisure ( Fig. 26-29); length usually more than 22 mm but smallest individuals of similar size .......................................................................................... 4

4(3). Clypeus parabolic, with lateral margins straight to weakly convex; clypeal carina obviously subapical, with teeth apices separated by about a dorsal eye width or more ( Fig. 1, 37) .......... ............................................................................................................. O. clunalis (LeConte)

— Clypeus strongly narrowed, subtriangular, with lateral margins straight or weakly concave; clypeal carina apparently apical, with teeth narrowly separated (much less than a dorsal eye width) such that clypeal carina appears cleft ( Fig. 3, 38) ......................... O. ligyroides Horn