Bothrideridae (sensu Robertson et al. 2015 )

Mcelrath, Thomas C., Androw, Robert A. & Mchugh, Joseph V., 2016, Antibothrus morimotoi Sasaji, an Old World cocoon-forming beetle (Coleoptera: Coccinelloidea: Bothrideridae) newly established in North America, Zootaxa 4154 (3), pp. 323-330 : 325

Key to the Nearctic genera of Bothrideridae (sensu Robertson et al. 2015) ( Coleoptera : Coccinelloidea)

[modified from Stephan (1989) and Philips & Ivie (2002); see those references for figures of genera other than Antibothrus ]

1. Procoxae separated by half or more than half the width of one procoxa; greatest width of pronotum less than greatest width of elytra; body generally flattened and wider................................................................. 2

1’’. Procoxae contiguous or nearly so; greatest width of pronotum about equal to greatest width of elytra; body generally subcylindrical, elongate, or narrow............................................................................. 4

2(1). Elytral costae interrupted or notched; each elytron with pair of conspicuous yellow callosities at or near mid length............................................................................................. Lithophorus Sharp

2’’. Elytral costae uninterrupted and even; elytra lacking yellow callosities.......................................... 3

3 (2”). First abdominal ventrite with distinct postcoxal lines extending beyond mid length of ventrite, usually nearly reaching the posterior margin; pronotal disc with pair of large, unusually shaped nodules bordered by deep grooves and separated by narrower groove............................................................................ Prolyctus Zimmerman

3’’. First abdominal ventrite with postcoxal lines at most vaguely indicated; pronotal disc not extremely modified, usually at most with median longitudinal depression........................................................ Bothrideres Dejean

4 (1”). Length greater than 9.0 mm; antennal club weakly 3-segmented; pronotal disc with well-developed, deep, median longitudinal groove, interrupted near middle; Pacific Northwest and California ............................. Deretaphrus Newman

4”. Length less than 6.0 mm; antennal club 2-segmented; pronotal disc variously modified, but if possessing groove never interrupted near middle; eastern and southern US............................................................... 5

5 (4”). Procoxae contiguous; scape and pedicel normal, not joined asymmetrically; terminal two antennomeres subequal in width.......................................................................................... Sosylus Erichson

5”. Procoxae narrowly separated; scape and pedicel joined asymmetrically, scape with pointed nodule; terminal antennomere narrower than penultimate (~ 2/3 as wide) ( Fig. 1 )................................................ Antibothrus Sharp

Figures

FIGURE 1. Antibothrus morimotoi (a) dorsal, (b) ventral, and (c) lateral habitus. Images by TC McElrath.