Stereoborus Wollaston 1873

Cantil, L. F., Sánchez Conicet, M. V., Dinghi, P. A. & Genise Conicet, J. F., 2007, Fig. 2 in Food Relocation Behavior, Nests, and Brood Balls of Canthon quinquemaculatus Laporte de Castelnau (Coleoptera: Scarabaeidae: Scarabaeinae), The Coleopterists Bulletin 24 (2), pp. 200-207 : 201-202

Key to the species of the genus Stereoborus Wollaston 1873

1 Anterior tibiae either fossorial or subfossorial................................ 9

1 9 Anterior tibiae normal, inner margin smooth and straight.................. 2

2 Head and disc of pronotum with dense, fine or coarse punctures.......... 3

2 9 Head and disc of pronotum with fine or minute, sparse punctures......... 5

3 Head and disc of pronotum with dense, fine punctures; rostrum wider than long............................................................................... 4

3 9 Head and disc of pronotum with dense, coarse punctures; rostrum narrow, longer than wide.............................. S. punctirostris Wollaston, 1873

4 Elytra fuscous, glossy, with a greenish-blue tint............ S. chinensis , n.sp.

4 9 Elytra black, glossy.................................. S. affinis Wollaston, 1873

5 Elytral striae with deep, round punctures..................................... 6

5 9 Elytral striae with rectangular punctures...................................... 7

6 Pronotum subequal in length and width, length only slightly greater than width................................................... S. brevirostris Lea, 1951

6 9 Pronotum with length much greater than width... S. robustus Wollaston, 1873

7 Pronotum with longitudinal, smooth line reaching from anterior to posterior margins; striae intervals on elytra smooth......................... 8

7 9 Pronotum with longitudinal, smooth line reaching neither anterior nor posterior margins; striae intervals on elytra with an irregular row of minute punctures......................................... S. binodifrons (Marshal 1921)

8 Punctures of elytral striae more or less constant in size along length of elytra.................................................. S. inductus, Pascoe, 1885

8 9 Punctures of elytral striae large and deep anteriorly, becoming smaller and more shallow posteriorly.............................. S. monticola Voss, 1957

9 Prothorax without trace of median line; elytral strial punctures large and sub-quadrate; interval convex, very sparsely punctate; suture slightly convex; legs short, anterior tibia fossorial............. S. laporteae Lea, 1896

9 9 Prothorax with feeble trace of median line; elytral strial punctures moderately large; interval flat, distinctly punctate; suture flat; legs long, anterior tibia sub-fossorial........................... S. interstitialis Lea, 1896