Cavonus, Sharp, 1875

Hutchinson, Paul M. & Allsopp, Peter G., 2020, Cavonus Sharp, 1875 (Coleoptera: Scarabaeidae: Dynastinae: Pentodontini Pseudoryctina) in Western Australia with description of a new species and the female of Cavonus sculpturatus Blackburn, 1888, Zootaxa 4852 (4), pp. 449-460 : 459

Key to Cavonus females (modified from Carne 1957)

Females of C. leai and C. fovealacus are unknown.

1. Clypeus with sides sinuate.............................................................................. 2

- Clypeus evenly rounded................................................................................ 4

2. Clypeal apex bisinuate; dorsal elytral striae heavily impressed and continuous over apical calli...... C. acutifrons Lea, 1917

- Clypeal apex truncate; dorsal elytral striae obsolete posterior to apical calli....................................... 3

3. Posteromedian area of pronotum finely micropunctate, surface microreticulate; frons with a transverse groove behind clypeofrontal ridge ( Carne 1957, Fig. 337)................................................... C. sharpi Blackburn, 1888

- Posteromedian area of pronotum with coarse punctation, surface shiny; frons lacking, or with only a trace of a transverse groove............................................................................ C. armatus Sharp, 1875

4. Coxal vestiture brownish black; metatibia with smaller spur straight, blunt; scutellum punctate at base but without submarginal sculpturing..................................................................... C. niger ( Blackburn, 1888)

- Coxal vestiture dark brown or brownish yellow; metatibia with smaller spur strongly curved, subacute; scutellum with welldefined submarginal groove or punctures.................................................................. 5

5. Coxal vestiture brownish yellow; pronotum lacking anteromedial swelling, surface strongly convex; pygidium contracted either side of apex, disc with impunctate median stripe................................... C. bidens ( Blackburn, 1896)

- Coxal vestiture dark brown ( Fig. 12 ); pronotum ( Figs. 11, 14 ) with anteromedial swelling, surface slightly flattened behind swelling; pygidium ( Fig. 16 ) not contracted on either side of apex, disc lacking impunctate median stripe.......................................................................................... C. sculpturatus Blackburn, 1888

Figures

FIGURES 11–16. Cavonus sculpturatus Blackburn, 1888, female (allotype of Epironastes nigrisetosus). 11, Dorsum; 12, venter; 13, lateral; 14, head lateral; 15, head, dorsal; 16, pygidium.