Geniatini Burmeister 1844
Creators: name: Jameson, Mary Liz
name: Hawkins, Shauna Joy
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae

description: Key to the Genera of Geniatini   Males: Protarsomeres dorsoventrally flattened, densely setose ventrally (Figs. 30–31, 33– 34); terminal sternite with margin emarginated; abdominal sternites in lateral view appearing concave or flat. Females: Protarsomeres dorsoventrally flattened or not, with or without dense ventral setae; terminal sternite with margin entire or rounded, not emarginated; abdominal sternites in lateral view appearing convex.   
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
description: Published as part of Jameson, Mary Liz & Hawkins, Shauna Joy, 2005, Synopsis of the genera of Geniatini (Coleoptera: Scarabaeidae: Rutelinae with an annotated catalog of species), pp. 1-76 in Zootaxa 874 (1) on pages 13-14, DOI: 10.11646/zootaxa.874.1.1, http://zenodo.org/record/5046175