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 : 458-459

publication ID

https://doi.org/ 10.11646/zootaxa.4852.4.3

publication LSID

lsid:zoobank.org:pub:D21984B5-3BC7-4175-AA15-3290FEC3E9DB

DOI

https://doi.org/10.5281/zenodo.4519000

persistent identifier

https://treatment.plazi.org/id/03F52C0E-FF83-AB7F-FF12-F95EFA10FC9C

treatment provided by

Plazi

scientific name

Cavonus
status

 

Key to Cavonus males (modified from Carne 1957)

1. Clypeus with sides sinuate ( Carne 1957, Fig. 334); elytra with dorsal striae obsolete posterior to subapical calli; basal pronotal ridge continuous...................................................................................... 2

- Clypeus rounded ( Carne 1957, Figs. 343, 351); elytra with dorsal striae continuing over subapical calli; basal pronotal ridge sometimes partially obsolete............................................................................ 3

2. Pronotum armed with lateral horns ( Carne 1957, Fig. 339); frons without a transverse excavation behind clypeofrontal ridge ( Carne 1957, Fig. 334); pronotal impression continuous to basal margin; genitalia as in Carne (1957, Figs. 341, 353); body 14–22 mm long; southern South Australia ................................................ C. armatus Sharp, 1875

- Pronotum with lateral convex elevations, frons with a transverse excavation behind clypeofrontal ridge ( Carne 1957, Fig. 340); basal convexity of pronotum interrupted by a shallow depression extending to basal margin; genitalia as in Carne (1957, Figs. 342, 350); body 12–21 mm long; southern South Australia ................................. C. sharpi Blackburn, 1888

3. Apical pygidial ridge glabrous........................................................................... 4

- Apical pygidial ridge setose............................................................................. 5

4. Pronotum with lateral horns; mentum highly compressed; body about 12 mm long; southwestern South Australia ........................................................................................... C. acutifrons Lea, 1917

- Pronotum with lateral convex elevations; mentum very conspicuous, depressed, strongly reflexed at ligula; body 15–17 mm long; southeastern South Australia, northwestern Victoria ................................ C. niger ( Blackburn, 1888) .

5. Pronotum with a pair of anteromedian tubercles ( Carne 1957, Fig. 351), with strong convexity at base and with basal ridge either continuous or obsolete; scutellum punctate or rugose on disc; genitalia as in Carne (1957, Figs. 344, 347); body 11–12.5 mm long; southeastern South Australia, northwestern Victoria ............................ C. bidens ( Blackburn, 1896)

- Pronotum with single anteromedian tubercle; disc of scutellum either coarsely punctate or bearing submarginal garland of small punctures ( Carne 1957, Fig. 353); genitalia unknown or as Figs. 9–10 View FIGURES 3–10 or Carne (1957, Figs. 345, 349).................. 6

6. Pronotum with small elevated tubercle ( Carne 1957, Fig. 348); basal ridge obsolete in lateral thirds, sometimes discernible on median third; elytral punctation moderately impressed, dorsal stria obsolete just before apical calli; southwestern New South Wales ................................................................................ C. leai Carne, 1957

- Pronotum with short, stout, erect anteromedian tubercle ( Carne 1957, Fig. 338); basal ridge continuous; elytral punctation deeply impressed, dorsal striae not obsolete at subapical calli; southwestern South Australia and southern Western Australia .. ................................................................................................... 7

7. Apical palpomere of mandibular palp cylindrical; pronotal impression with medial elevation ( Figs. 3, 6 View FIGURES 3–10 ); clypeal surface ( Fig. 7 View FIGURES 3–10 ) heavily punctate; scutellum ( Fig. 3 View FIGURES 3–10 ) with submarginal garland of punctures; genitalia as in Carne (1957, Figs. 345, 349); body 18–19 mm long; southwestern South Australia, southeastern Western Australia ( Fig. 28 View FIGURE 28 )................................................................................................... C. sculpturatus Blackburn, 1888

- Apical palpomere of mandibular palp conical, widest and truncate at apex; pronotal impression uniformly concave ( Figs. 17, 20 View FIGURES 17–25 ); clypeal surface ( Fig. 21 View FIGURES 17–25 ) with fine sparse punctures; scutellum ( Fig. 17 View FIGURES 17–25 ) disc coarsely punctate; genitalia as in Figs. 23–24 View FIGURES 17–25 ; body 15.5 mm long; southwestern Western Australia ( Fig. 28 View FIGURE 28 )........... C. fovealacus Hutchinson & Allsopp , new species

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Dynastidae

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