Athlia

Smith, Andrew B. T. & Evans, Arthur V., 2018, Taxonomic review of Athliini (Coleoptera: Scarabaeidae: Melolonthinae), a new tribe of scarab beetles endemic to South America, Zootaxa 4471 (2), pp. 279-308 : 285-286

Key to species of Athlia (based on Saylor 1946b; Gutiérrez 1949; Martínez 1967, 1974)

1. Metathoracic wings reduced and non-functional (slightly lift an elytron to check). Central Chile (VIII Región del Biobío to IX Región de la Araucanía) ( Fig. 69 )..................................................... Athlia plebeja Burmeister

- Metathoracic wings full sized and functional................................................................ 2

2. Pronotum with basal angles evenly rounded, not protruding or angulate ( Figs. 30 , 34 , 46 )............................ 3

- Pronotum with basal angles protruding or angulate ( Figs. 13 , 17 , 22 , 26 , 42 , 52 ).................................... 5

3. Length less than 10 mm. Metatarsomere 1 noticeably shorter than metatarsomere 2 ( Fig. 32 ). Southern Argentina (Neuquén to Chubut, Fig. 69 )................................................................... Athlia parvissima Saylor

- Length greater than 10 mm. Metatarsomere 1 equal to or slightly shorter than metatarsomere 2 ( Fig. 28 )................. 4

4. Labrum weakly curved, weakly elevated medially; lateral border of clypeus slightly reflexed; dorsal surface tan to chestnut brown. Central Chile (V Región de Valparaíso, Fig. 79)................................... Athlia rotundata Gutiérrez

- Labrum evenly curved and elevated medially; lateral border of clypeus strongly reflexed; dorsal surface light brown to light tan. Southern Argentina (Neuquén to Chubut) and southern Chile (Región de Aisén, Fig. 68 ).......... Athlia giaii Martínez

5. Labrum not reflexed, on the same plane as clypeal surface. Southeastern Brazil (Santa Catarina, Fig. 67 ).................................................................................................... Athlia brasilica Saylor

- Labrum reflexed above the plane of clypeal surface........................................................... 6

6. Pronotum surface with dense, even punctures ( Figs. 22 , 42 , 52 )................................................. 7

- Pronotum surface with sparse, sometimes unevenly distributed punctures ( Figs. 13 , 26 ).............................. 9

7. Elytra evenly covered with setae; pronotum with long setae along lateral edges. Central Chile (IV Región de Coquimbo to IX Región de la Araucanía, Fig. 72 )........................................................ Athlia rustica Erichson

- Elytra glabrous medially and sparsely setose laterally and apically; pronotum with long setae along lateral edge but mainly in apical half........................................................................................... 8

8. Elytra length less than twice the length of head and pronotum combined Northern and central Argentina (Jujuy to Río Negro, Fig. 67 ).............................................................................. Athlia bruchi Moser

- Elytra length greater than twice the length of head and pronotum combined. Central Chile (IV Región de Coquimbo to Región Metropolitana de Santiago, Fig. 70 )................................................ Athlia problematica Gutiérrez

9. Length greater than 12 mm; apical and basal pronotal angles well developed ( Fig. 26 ). Southern Brazil (São Paulo, Fig. 67 )...................................................................................... Athlia freyi Martínez

- Length less than 12 mm; apical and basal pronotal angles weakly developed ( Fig. 13 ). Northeastern Argentina (Buenos Aires, Fig. 67 )............................................................................ Athlia bollei Martínez

Figures

FIGURE 67. Distribution map of Athlia bollei Martínez, 1955 (red circle), Athlia brasilica Saylor, 1946 (green circle), Athlia bruchi Moser, 1924 (black circles), and Athlia freyi Martínez, 1974 (blue circle).

FIGURE 68. Distribution map of Athlia giaii Martínez, 1959 (black circles).

FIGURE 69. Distribution map of Athlia parvissima Saylor, 1946 (black circles) and Athlia plebeja Burmeister, 1855 (red circles).

FIGURE 70. Distribution map of Athlia problematica Gutiérrez, 1950 (black circles).

FIGURE 72. Distribution map of Athlia rustica Erichson, 1835 (black circles).

FIGURES 28–31. Athlia giaii Martínez, 1959. 28, dorsal habitus; 29, oblique habitus; 30, head and pronotum; 31, parameres.

FIGURES 32–35. Athlia parvissima Saylor, 1946. 32, dorsal habitus; 33, oblique habitus; 34, head and pronotum; 35, parameres.

FIGURES 44–47. Athlia rotundata Gutiérrez, 1949. 44, dorsal habitus; 45, oblique habitus; 46, head and pronotum; 47, parameres.

FIGURES 11–14. Athlia bollei Martínez, 1955. 11, dorsal habitus; 12, oblique habitus; 13, head and pronotum; 14, parameres.

FIGURES 15–18. Athlia brasilica Saylor, 1946. 15, dorsal habitus; 16, oblique habitus; 17, head and pronotum; 18, parameres.

FIGURES 19–23. Athlia bruchi Moser, 1924 lectotype. 19, dorsal habitus; 20, oblique habitus; 21, labels; 22, head and pronotum; 23, parameres.

FIGURES 24–27. Athlia freyi Martínez, 1974. 24, dorsal habitus; 25, oblique habitus; 26, head and pronotum; 27, parameres.

FIGURES 40–43. Athlia problematica Gutiérrez, 1950. 40, dorsal habitus; 41, oblique habitus; 42, head and pronotum; 43, parameres.

FIGURES 48–53. Athlia rustica Erichson, 1835 lectotype. 48, dorsal habitus; 49, oblique habitus; 50, ventral habitus; 51, labels; 52, head and pronotum; 53, parameres.