Bioacoustics of Geniatini

1. Mentum with apicomedial, tooth­like projection ( Fig. 16 , 41 ) .................................... 3 1’. Mentum without apicomedial, tooth­like projection ( Figs. 38–40 ) ............................. 2 2. Apex of mentum with medial notch, not crenulate ( Figs. 39–40 ). All claws simple on all legs ........................................................................................... Rhizogeniates Ohaus 2’. Apex of mentum crenulate ( Fig. 38 ). Modified claw moderately split on all legs ....... .................................................................................................. Mimogeniates Martínez 3. Mesosternum anterior to mesocoxae strongly concave ( Fig. 52 ) ................................... ................................................................................. Xenogeniates Villatoro & Jameson 3’. Mesosternum anterior to mesocoxae flat or slightly convex, not strongly concave ( Fig. 51 ) ............................................................................................................................... 4 4. Stipes of maxilla produced, with well­developed lateral lobe ( Fig. 43 ) or lateral angle ( Fig. 42 ) ......................................................................................... Lobogeniates Ohaus 4’. Stipes of maxilla not produced, instead rounded or broadly rounded ( Fig. 44 ) ........... 5 5. Mandible with rounded, recurved, apical lobe ( Fig. 20 ). Dorsal surface with abundant, decumbent, white setae. Antennal club of male twice length of segments 2–7; antennal club of female subequal to segments 2–7 ....................................... Eunanus Ohaus 5’. Mandible lacking rounded, recurved, apical tooth; instead simple ( e.g. , Fig. 19 ). Dorsal surface with or without sparse setae. Antennal club of male and female subequal to or slightly longer than segments 2–7 ....................................................................... 6 6. Length of antennal club half or less than half length of first antennal segment ( Figs. 5 , 23 ). Clypeal apex (in lateral view) sloped 45º with respect to dorsal plane of clypeus ( Figs. 23 , 36 ). Male tarsomeres simple, not flattened and dilated ( Fig. 32 ) .................. ................................................................................................ Geniatosoma Costa Lima 6’. Length of antennal club more than half length of first antennal segment. Clypeal apex (in lateral view) sloped 60–90º with respect to dorsal plane of clypeus ( Fig. 37 ). Male tarsomeres dorsoventrally flattened and dilated ( e.g. , Fig. 34 ) .................................... 7 7. Form of clypeus parabolic, apex not reflexed ( Fig. 24 ). Mandible exposed, apex narrowly rounded ( Fig. 24 ). Male with all claws appearing simple on all legs ................. ...................................................................................................... Heterogeniates Ohaus 7’. Form of clypeus not parabolic (instead rounded, quadrate), apex reflexed ( e.g., Figs. 19–20, 22, 25–26 ). Mandible exposed or not, apex broadly rounded ( e.g. , Figs. 19, 23, 25 ). Male with claws obviously toothed on some or all legs ...................................... 8 8. Length of protarsomeres 2–4 subequal in length to protarsomere 5 ( Fig. 31 ). Clypeus of male with lateral margins expanded, apex quadrate ( Fig. 21 ); clypeus of female with lateral margins parallel, apex quadrate ............................................ Evanos Ohaus 8’. Length of protarsomeres 2–4 greater than length of protarsomere 5 ( Figs. 30, 33–34 ). Clypeus of male and female with lateral margins constricted, apex rounded or trapezoidal ( e.g., Figs. 19, 22, 25–28 ) .................................................................................. 9 9. Elytral margin with deep, setose punctures on lateral edge from apex of metepisternum to apex of elytra ( Figs. 45a–b, 46a–b )......................................................................... 10 9’. Elytral margin without deep, setose punctures on lateral edge from apex of metepisternum to apex of elytra ................................................................................................. 11 10. Elytral margin with well­developed stridulatory ridge and with rigid stridulatory setae ( Fig. 45a–b ). Apex of metafemur (dorsal view) with stridulatory patch ( Fig. 35 ) ........ ........................................................................................................ Trizogeniates Ohaus 10’.Elytral margin lacking stridulatory ridge and without rigid stridulatory setae ( Fig. 46a– b ). Apex of metafemur (dorsal view) lacking stridulatory patch .......... Geniates Ohaus 11. Eyes small, interocular width greater than 6 transverse eye diameters ( e.g., Fig. 19 ) 12 11’. Eyes larger, interocular width less than 5 transverse eye diameters ( e.g., Fig. 25 ) ....... ..................................................................................................... Leucothyreus Macleay 12. Protarsomere 5 dorsoventrally flattened, width more than half length ( Fig. 30 ). Length of body from apex of clypeus to apex of elytra more than 9.0 mm ............................... .......................................................................................... Bolax Fischer von Waldheim 12’.Protarsomere 5 dorsoventrally flattened or not; if flattened, then width less than half length. Length of body from apex of clypeus to apex of elytra less than 9.0 mm ........ ................................................................................................... Microchilus Blanchard