Monteithocanthon

Gunter, Nicole L. & Weir, Thomas A., 2017, Two new genera of Australian dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) with the description of six new species and transfer of six described species, Zootaxa 4290 (2), pp. 201-243 : 224

Key to Monteithocanthon species

1. Pygidial groove curved and deep; elytral epipleurae narrower in basal 1/2; elytral striae visible or obsolete; male metatibiae variously bent and with inner apex produced; fully winged or short winged........................................2

- Pygidial groove straight and shallow; elytral epipleurae wider in basal 1/2; elytral striae obsolete; male metatibiae only slightly bent and inner apex not produced; wings absent..............................................................5

2. Elytral striae obsolete; sides of pronotum not margined; hypomeral striae short or obsolete; short winged; male metatibiae as in Fig. 8 B; aedeagus as in Fig. 9 B; Mount Elliot , northern Queensland ...................................................................................................... Monteithocanthon elliotensis Gunter & Weir new species

- Elytra with at least striae 2–5 clearly visible on disc; sides of pronotum finely margined; hypomeral striae longer, 1/3 to 1/2 as long as hypomeron; fully winged; male metatibiae as in Fig. 8 A, D–E............................................3

3. Elytral striae 1–6 clearly visible on disc, 6 often reaching base, intervals at least partly reticulate; elytra appearing markedly flanged along outer edge from near base to apex ( Fig. 10 A); lateral lobe of metaventrite narrowly bordered anteriorly ( Fig. 7 G); male with tubercle on metaventrite; male metatibiae as in Fig. 8 A; aedeagus as in Fig. 9 A; wet tropics of northern Queensland.................................................................. Monteithocanthon arator (Matthews)

- Elytra with only striae 1–5 or 2–5 clearly visible on disc, 6 obsolete, intervals not reticulate; elytra not appearing markedly flanged; lateral lobe of metaventrite broadly bordered anteriorly ( Fig. 7 K); male without tubercle on metaventrite; male metatibiae as in Fig. 8 D–E................................................................................... 4

4. Hypomeral striae about 1/2 as long as hypomeron and closely paralleling margin of pronotum; male metaventrite not depressed between mesocoxae; male metatibiae as in Fig. 8 E; aedeagus as in Fig. 9 E; Koombooloomba area, northern Queensland ...................................................... Monteithocanthon koombooloomba Gunter & Weir , new species

- Hypomeral striae not more than 1/3 as long as hypomeron and diverging from margin of pronotum; male metaventrite slightly depressed between mesocoxae; male metatibiae as in Fig. 8 D; aedeagus as in Fig. 9 D; Crater National Park, northern Queensland ................................................. Monteithocanthon paraarator Gunter & Weir , new species

5. Sides of pronotum finely margined; hypomeral striae short; pygidial groove about 1/3 as wide as pygidium; eyes narrow, separated by about 20 eye widths; male metatibiae as in Fig. 8 C; aedeagus as in Fig. 9 C; high altitudes of Lamington National Park and Springbrook National Park, southeastern Queensland ......................... Monteithocanthon glaber (Matthews)

- Sides of pronotum not margined; hypomeral striae longer, about 1/2 as long as hypomeron; pygidial groove about 1/2 as wide as pygidium; eyes narrow, separated by about 30 eye widths; male metatibiae as in Fig. 8 F; aedeagus as in Fig. 9 F; Stirling National Park and Walpole National Park, southwestern Western Australia ................................................................................................ Monteithocanthon peckorum Gunter & Weir , new species

Figures

FIGURE 7. Key characters of Monteithocanthon new genus, all scale bars 0.25 mm. A, lateral view of elytra (M. arator); B, ventral view of profemur, note the absence of trochantofemoral anterior pit and presence of ornamentation on apex of protibia (M. arator); C, close up of ornamentation on apex of protibia, arrows pointing to comb and brush of setae (M. arator); D, dorsal view of male protibia with three tibial teeth each with only one group of setae dorsally (M. arator ♂); E, ventral view of male protibia (M. arator ♂); F, dorsal view of female protibia, note the apical spur is long and narrow (M. arator ♀); G, view of narrow anterior margin of lateral lobe of mesoventrite (M. arator); H, dorsal view of male mesotibia (M. arator ♂); I, ventral view of male mesotibia (M. arator ♂); J, male metatibia (M. arator ♂); K, view of broad anterior margin of lateral lobe of metaventrite (M. koombooloomba).

FIGURE 8. Male metatibia of species of Monteithocanthon new genus, all scale bars 0.25 mm. A, Monteithocanthon arator new combination; B, M. elliotensis new species; C, M. glaber new combination; D, M. koombooloomba new species; E, M. paraarator new species; F, M. peckorum new species; G, female metathoracic leg of M. arator.

FIGURE 9. Pygidium and aedeagus (left view, dorsal view, right view) of species of Monteithocanthon new genus. Scale bars of pygidium 0.5 mm, scale bars of aedeagus 0.2 mm. A, Monteithocanthon arator new combination; B, M. elliotensis new species; C, M. glaber new combination; D, M. koombooloomba new species; E, M. paraarator new species; F, M. peckorum new species.

FIGURE 10. Habitus of species of Monteithocanthon new genus in relative scale to each other, scale bars 1 mm. A, Monteithocanthon arator new combination; B, M. elliotensis new species; C, M. glaber new combination; D, M. koombooloomba new species; E, M. paraarator new species; F, M. peckorum new species.