Key to Macropodina species

This key to the species of Macropodina is based on: Potts, R.W.L. 1945. A key to the species of Cremastocheilini of North American and Mexico (Coleoptera: Scarabaeidae). Bull. Brooklyn Ent. Soc. 40: 72-78. and Alpert, Gary D. 1994. A Comparative Study of the Symbiotic Relationship Between Beetles of the Genus Cremastocheilus (Coleoptera: Scarabaeidae) and their Host Ants (Hymenoptera:Formicidae). Sociobiology 25(1).

You may also be interested in: Krikken, J. 1982. North American myrmecophilous beetles of the genus Cremastocheilus: discussion of their classification and a review of the subgenera Trinodia and Anatrinodia (Coleoptera: Cetoniidae). Proceedings of the Koninklijke Nederlandse Academie van Wetenschappen. Series C. p. 509-526. and Mynhardt, G. & J.W. Wenzel 2010. Phylogentic analysis of the myrmecophilous Cremastocheilus Knoch (Coleoptera, Scarabaeidae, Cetoniinae), based on external adult morphology. ZooKeys 34: 129-140.

1

• Head sparsely punctate, punctures separated by 2 to 3 times their own widths; elytral disc nearly impunctate; pronotum with side margins angulate at apical 3rd; anterior angles not deeply incised before the nodes; fifth tarsomere of anterior tarsus rounded laterally; CA, AZ..........Cremastocheilus puncticollis.

• Head moderately to densely punctate; pronotum with side margins evenly rounded at apical 3rd; anterior angles deeply incised before the nodes; 5th tarsomere of anterior tarsus flattened laterally . . . . . 2

2

return to couplet #1

• Elytra with subcylindrical ring-like punctures, often coalescent (Fig. ); 3rd tarsomere of anterior tarsus attached to 4th below upper proximal corner, AZ, NM (Fig. ). . . . . Cremastocheilus beameri

Fig. 2 Dorsal view

Fig. 1 Dilated tarsi of fore-leg

Fig. 3 close up of prontoum

mentum

• Elytra with elongate punctures; 3rd tarsomere of anterior tarsus attached to 4th at the extreme outer corner of the posterior margin of that segment, Ca, AZ. ....Cremastocheilus planatus

Fig. Cremastocheilus planatus

Fig. Cremastocheilus planatus fore-tarsi

Fig. Cremastocheilus planatus lateral

Fig. Cremastocheilus planatus frontal