Centris (Wagenknechtia)

Vivallo, Felipe, 2013, Revision of the bee subgenus Centris (Wagenknechtia) Moure, 1950 (Hymenoptera: Apidae: Centridini), Zootaxa 3683 (5), pp. 501-537 : 521-522

Key to the species of the subgenus Centris (Wagenknechtia)

Females

1 Metasoma with metallic blue or greenish reflections ( Figs. 2 , 18 , 22 and 26 )....................................... 2

- Metasoma without metallic reflections ( Figs. 6 , 10 and 14 )..................................................... 5

2 Mesoscutum and scutellum with whitish or yellowish brown to orange hair ( Figs. 2 and 18 ); metasoma with bluish or greenish reflections; eyes black (in live specimens); fore elaiospathe located on the distal half of the basitarsus ( Fig. 29 ); hind elaiospathe with the hairs of the primary comb separate ( Fig. 30 ); distal edge of 4th labial palpomere truncate................. 3

- Mesoscutum and scutellum with dark brown hairs ( Figs. 22 and 26 ); metasoma with blue violet reflections; eyes red (in live specimens); fore elaiospathe extending for the entire length of the basitarsus or strongly modified with abundant, short and dense pilosity on its ventral surface ( Fig. 33 ); hind elaiospathe formed by overlapping hairs; distal edge of 4th labial palpomere rounded............................................................................................. 4

3 Mesoscutum and scutellum with whitish hairs ( Fig. 2 ); metasoma with bluish metallic reflections; fore elaiospathe with the secondary comb formed by three giant spatulate hairs ( Fig. 29 ).......................... Centris cineraria Smith, 1854

- Mesoscutum and scutellum with light brown to orange hairs ( Fig. 18 ); metasoma with blue greenish metallic reflections; fore elaiospathe with the secondary comb formed by four giant spatulate hairs................... Centris orellanai Ruiz, 1940

4 Clypeus with denser punctation in the upper half, sparser on the lower half; labrum triangular ( Fig. 25 ); fore elaiospathe highly modified with short, dense and branched hairs on the ventral surface and on the anterior margin of the basitarsus ( Fig. 33 )......................................................................... Centris vardyorum Roig-Alsina, 2000

- Clypeus with dense and relatively uniform punctation; labrum semicircular; fore elaiospathe with compact primary and secondary combs positioned along the basitarsus................................... Centris rhodophthalma Pérez, 1911

5 Body covered mainly with whitish pilosity, at least on head and mesosoma ( Fig. 14 ); basitibial plate with one concavity near the anterior and one near the posterior margin, without secondary plate ( Fig. 37 )......... Centris muralis Burmeister, 1876

- Body completely covered with dark brown or yellowish pilosity ( Figs. 6 and 10 ); basitibial plate with a central concavity in the distal half of the primary plate, secondary plate present, with the lower edge concave................................ 6

6 Body completely covered with dark brown hairs ( Fig. 6 ); maxillary palpus five segmented; fore and hind elaiospathe normally developed with compacted combs; distal edges of terga and sterna not broadly translucent....................................................................................................... Centris escomeli Cockerell, 1926

- Body covered with yellowish pilosity ( Fig. 10 ); maxillary palpus four segmented; fore and hind elaiospathe vestigial, with both primary combs formed by separated hairs ( Figs. 31 and 32 ); distal edges of terga and sterna broadly translucent............................................................................ Centris moldenkei Toro & Chiappa, 1989

Figures

FIGURES 1 – 4. Centris cineraria Smith, 1854. Fig. 1. Female (Viña del Mar, Chile): Head, frontal view. Fig. 2. Habitus, lateral view. Fig. 3. Male (Viña del Mar, Chile): Head, frontal view. Fig. 4. Habitus, lateral view. Scale bars 1 mm.

FIGURES 17 – 20. Centris orellanai Ruiz, 1940. Fig. 17. Female (Neotype female: Los Andes, Chile): Head, frontal view. Fig. 18. Habitus, lateral view. Fig. 19. Male (Baños del Toro, Chile): Head, frontal view. Fig. 20. Habitus, lateral view. Scale bars 1 mm.

FIGURES 21 – 24. Centris rhodophthalma Pérez, 1911. Fig. 21. Female (El Pangue, Chile): Head, frontal view. Fig. 22. Habitus, lateral view. Fig. 23. Male (El Pangue, Chile): Head, frontal view. Fig. 24. Habitus, lateral view. Scale bars 1 mm.

FIGURES 25 – 28. Centris vardyorum Roig-Alsina, 2000. Fig. 25. Female (El Challao, Argentina): Head, frontal view. Fig. 26. Habitus, lateral view. Fig. 27. Male (El Challao, Argentina): Head, frontal view. Fig. 28. Habitus, lateral view. Scale bars 1 mm.

FIGURES 5 – 8. Centris escomeli Cockerell, 1926. Fig. 5. Female (Guatacondo, Chile): Head, frontal view. Fig. 6. Habitus, lateral view. Fig. 7. Male (Guatacondo, Chile): Head, frontal view. Fig. 8. Habitus, lateral view. Scale bars 1 mm.

FIGURES 9 – 12. Centris moldenkei Toro & Chiappa, 1989. Fig. 9. Female (Guatacondo, Chile): Head, frontal view. Fig. 10. Habitus, lateral view. Fig. 11. Male (Guatacondo, Chile): Head, frontal view. Fig. 12. Habitus, lateral view. Scale bars 1 mm.

FIGURES 13 – 16. Centris muralis Burmeister, 1876. Fig. 13. Female (Mendoza, Argentina): Head, frontal view. Fig. 14. Habitus, lateral view. Fig. 15. Male (Mendoza, Argentina): Head, frontal view. Fig. 16. Habitus, lateral view. Scale bars 1 mm.

FIGURES 29 – 34. Oil-collecting structures. Figs. 29, 31 and 33. Fore elaiospathes. Figs. 30, 32 and 34. Hind elaiospathes. Figs. 29 and 30. Centris cineraria Smith, 1854. Scale bars 500 µm. Figs. 31 and 32. Centris moldenkei Toro & Chiappa, 1989. Scale bars 200 µm. Figs. 33 and 34. Centris vardyorum Roig-Alsina, 2000. Scale bars 500 µm.

FIGURES 35 – 38. Figs. 35 and 36. Centris orellanai Ruiz, 1940 (Neotype female): Fig. 35. Basitibial plate. Fig. 36. Pygidial plate. Fig. 37. Centris muralis Burmeister, 1876: Basitibial plate. Fig. 38. Centris cineraria Smith, 1854: Male genital capsule (dorsal view). Scale bars 0. 5 mm.