GEOTRUPIDAE Author: John F. Lawrence, 2001. Classification Suborder Polyphaga, Series Scarabaeiformia, Superfamily Scarabaeoidea. Description Antenae with 11 segments and a 3 segments club. Antennal insertions concealed. Visible portion of procoxa projecting bellow prosternum with the trochantin concealed. Procoxal cavity externally closed and internally open. Mesocoxae contigous to separated by less than 0.4 X coxal width, with mesocoxal cavity laterally open. Tarsal formula 5-5-5. Numberof ventrites 6 without ventrites connate. Body length 10-20 mm. Broadly ovate to globular, glabrous or setose. Antennal club lamellate. Only Central American scarabaeoids with 11-segmented antennae. Labrum and mandibles exposed. Quick identification Geotrupidae are relatively large and robust beetles with 11-segmented antennae and 6 ventrites. In Mesoamerica there are three genera, Athyreus and Neoathyreus which are pubescent with an excavation or horn on the pronotum, and Bolbelasmus which are similar to this North American species in a related genus (last figure). Genera occurring in Costa Rica Bolbelasmus, Athyreus, Neoathyreus. © CSIRO Emtomology, 1999 Athyreinae (Neoathyreus) © CSIRO Emtomology, 1999 Bolboceratinae Derechos Reservados INBio. Copyrights INBio