Canthonella Chapin

Ivie, Michael A. & Philips, Keith, 2008, Three new species of Canthonella Chapin from Hispaniola, with new records and Nomenclatural changes for West Indian dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae), Zootaxa 1701, pp. 1-14 : 7-8

Key to West Indian Canthonella Chapin

(Modified from Matthews 1966, Ivie & Philips 1990)

1. Protibia with 3 teeth on outer margin...........................................................................................................2

- Protibia with 2 teeth on outer margin...........................................................................................................3

2. Elytral interstriae uneven in height, especially on declivity; protibia very narrow; Puerto Rico and the Virgin Islands............................................................................................................ Canthonella parva Chapin

- Elytral interstriae flat, even in height; protibia widened apically; Hispaniola ............................................... ..................................................................................................... Canthonella constans Matthews ( Fig. 22 )

3. Elytral macula yellow-orange, reaching base of elytron ( Fig. 9 ); Hispaniola..............................................4

- Elytral macula whitish-yellow, not reaching base of elytron, with at least a narrow black margin at base ( Figs. 7, 8 ); Cuba and Hispaniola.................................................................................................................5

4. Mesad edge of elytral spot reaching or nearly reaching suture; eighth elytral stria strongly punctate .......... ..................................................................................................... Canthonella isabellae Matthews ( Fig. 23 )

- Mesad edge of elytral spot reaching to 2nd stria; eighth elytral stria impunctate............................................ ....................................................................................................... Canthonella sikesi new species ( Fig. 21 )

5. Elytral spot ending at or laterad to 3rd stria ( Figs 7, 8 ); labium rounded, truncate or emarginate anteriorly ( Figs. 1, 2 and Ivie & Philips 1990, Fig.1 ); Cuba and Hispaniola................................................................6

- Elytral spot extending at least half-way across 2nd interstia ( Ivie & Philips 1990, Figs. 3, 4 ); labium obtusely produced anteriorly; Hispaniola.....................................................................................................8

6. Labium narrow, subtruncate ( Matthews 1966, Fig. 84); Cuba..................... Canthonella pygmaea (Harold)

- Labium broader, truncate or emarginate ( Figs. 1, 2 ); Hispaniola.................................................................7

7. Elytral ground color castaneous, darker pitchy around elytral spot and along suture, pronotal disc usually castaneous with pitchy base; labium truncate apically ( Fig. 1 )...................................................................... ................................................................................................. Canthonella jarmilae new species ( Fig. 19 )

- Elytral and pronotal ground color black; labium emarginate apically ( Fig. 2 )............................................... ............................................................................................... Canthonella quesqueya new species ( Fig. 20 )

8. Elytron with triangular spot at apex of interstriae 1, 2, and 3; a smaller (occasionally obsolete) macula at apex of stria 5; 3.3–4.8 mm ............................................. Canthonella baorucensis Ivie & Philips ( Fig. 24 )

- Elytron immaculate in apical ½; 2.3–3.4 mm ........................ Canthonella howdeni Ivie & Philips ( Fig. 25 )

Figures

FIGURES 19 – 22. Dorsal habiti. 19. Canthonella jarmilea; 20. Canthonella quesquaya; 21. Canthonella sikesi; 22. Canthonella constans.

FIGURES 1 – 9. 1 – 3. Labia. 1. Canthonella jarmilea; 2. Canthonella quesquaya; 3. Canthonella sikesi. 4 – 6. Heads 4. Canthonella jarmilea; 5. Canthonella quesquaya; 6: Canthonella sikesi. 7 – 9. Left elytra 7, Canthonella jarmilea; 8. Canthonella quesquaya; 9. Canthonella sikesi.

FIGURES 23 – 25. Dorsal habiti. 23. Canthonella isabellae; 24. Canthonella baorucensis; 25. Canthonella howdeni.