Geotrupes

Key to the Geotrupes View in CoL of Oaxaca

1 Antennal club grayish-black ( Fig. 2b View Fig ); each mandible with a considerably pronounced rounded lobe; legs metallic blue; male protibiae long and rounded with apical teeth spiniform; male profemora with a strong transverse tooth at its base ( Fig. 3b View Fig ); aedeagus as in Figs 2 View Fig c–f; Sierra Sur (Sierra de Miahuatlán). ................. ............................................. G. lobatus Howden, 1974 View in CoL

– Antennal club yellowish ( Figs 1 View Fig a–b) or reddish-brown ( Fig. 6a View Fig ) to brown; mandibles lacking a pronounced rounded lobe ( Fig. 1a View Fig ); legs black; male protibiae short and straight with apical teeth flattened; male profemora without a transverse ridge at its base. ...................... 2

2 Dorsally shining; pronotum, scutellum and elytral intervals shining, offen green, golden or blue with coppery reflections ( Figs 1 View Fig , 7a View Fig , 8 View Fig , 9 View Fig ); elytral intervals convex ( Figs 1 View Fig , 7 View Fig , 8 View Fig ); smaller species (13–22 mm); males not having profemora ventrally excavated near procoxae. ........................................................................................ 3

– Dorsally opaque; pronotum, scutellum, and frequently elytral intervals finely shagreened; elytral intervals flattened centrally ( Fig. 6a View Fig ); large species (22–26 mm); males having profemora ventrally excavated near procoxae; aedeagus as in Figs 6 View Fig c–f; mountains in central Mexico (Guerrero, Guanajuato, Jalisco) and mountains of Oaxaca (Mixteca Shield, Sierra Norte, Sierra Sur). ........................................................ G. sallei Jekel, 1866 View in CoL

3 Posterior pronotal margin fine but distinct, except in front of scutellum ( Fig. 7a View Fig ); male mesoventrite with a distinct carina in front of mesocoxae; male procoxa forming a broad saddle-like structure at the point of junction with trochanter; aedeagus as in Figs 7 View Fig c–f; Sierra Madre Oriental (Hidalgo, Puebla, Veracruz) and Sierra Norte. .................. G. nebularum Howden, 1964 View in CoL

– Posterior pronotal margin distinct in front of scutellum ( Figs 1 View Fig , 8 View Fig , 9 View Fig ); male mesoventrite with a distinct, projected keel in front of mesocoxae; male procoxa forming a slender saddle-like structure at the point of junction with trochanter. ............................................... 4

4 Elytral striae finely punctate or crenulate except near suture ( Figs 1 View Fig , 8b View Fig ); elytra bluish-black, greenish-black, or golden-black sometimes with reddish-coppery tint ( Figs 1 View Fig , 8b View Fig ); pronotum punctate laterally ( Figs 1 View Fig , 8b View Fig ); Sierra Norte or Mixteca. ............................................... 5

– Elytral striae virtually impunctate, at most vaguely crenulate ( Fig. 8a View Fig ); elytra black with faint tinge of green or blue on elytron; pronotum generally heavily and grossly punctate ( Fig. 8a View Fig ); aedeagus like Figs 8 View Fig c–f; Sierra Sur (Sierra de Miahuatlán). ..................... ................................................. G. pecki Howden, 1974 View in CoL

5 Elytra dull bluish-black ( Fig. 9b View Fig ); aedeagus as in Figs 9 View Fig c–f; Sierra Norte (Sierra de Ixtlán, Sierra de Juárez, Sierra Mazateca, and Nudo del Zempoaltépetl). ........... ........................................ G. viridiobscurus Jekel, 1866 View in CoL

– Elytra bright green, blue, or golden-black with reddish-coppery tint ( Fig. 1a View Fig ); aedeagus as in Figs 1 View Fig c–f; Mixteca (Sierra de Tlaxiaco). .......................................... ..................................................... G. nuntiatus View in CoL sp. nov.