Ceratalictus camargoi, Coelho, Beatriz W. T. & Gonçalves, Rodrigo B., 2010

Coelho, Beatriz W. T. & Gonçalves, Rodrigo B., 2010, A taxonomic revision of the augochlorine bee genus Ceratalictus Moure (Hymenoptera, Apoidea), Zootaxa 2675, pp. 1-25 : 3-4

Key to the species of Ceratalictus

Females

1 Preoccipital ridge strongly lamellate ( Fig. 24 ); head much wider than long ( Bolivia: Mapiri; Brazil: Acre, Goiás, Mato Grosso, Minas Gerais, Rondônia, São Paulo) ......................................................................... C. stigon (Vachal) - Preoccipital ridge not lamellate, head shape variable................................................................................................... 2 2 Lateral angle of pronotum obtuse (as in Figs. 19 and 23 ) ............................................................................................ 3 - Lateral angle of pronotum acute (as in Figs. 17, 18, 20–22 ) ....................................................................................... 5 3 Straight carinae on metapostnotum not extending laterally onto propodeum; head and mesosoma coarsely punctate giving it a dull appearance ( Fig. 15 ); metasoma smooth, not lineolate, frequently with some cupreous highlights ( Argentina: Misiones; Brazil: Paraná, Rio Grande do Sul, Santa Catarina, São Paulo; Paraguay: Caaguazu, Itapúa; Uruguay: Tacuarembo) ................................................................................................................ C. psoraspis (Vachal) - Straight carinae on metapostnotum extending laterally onto propodeum; head and mesosoma not dull; metasoma lineolate, green, very rarely with reddish highlights ........................................................................................................ 4 4 Head wider than long, with a rounded appearance ( Fig. 10 ); mesoscutal disc with punctures separated by 1–3 puncture diameters, punctures of variable size ( Fig.19 ) ( Bolivia: Santa Cruz; Brazil: Mato Grosso, Minas Gerais, Paraná, São Paulo) ....................................................................................................................................... C. clonius (Bréthes) - Head as long as wide, with an elongate appearance ( Fig. 9 ); mesoscutal disc with punctures almost contiguous, punctures approximately equal in size ( Brazil: Minas Gerais) ........................................................ C. camargoi n. sp. 5 Punctures on lateral part of mesoscutum not contiguous, punctation sparser toward the disc ( Figs. 17, 22 ) ............ 6 - Punctures on lateral part of mesoscutum almost contiguous from lateral margin to approximately one-third between parapsidal lines and median sulcus, centrally more spaced ( Figs. 18, 20, 21 ) ............................................................. 7 6 Metapostnotum with almost all carinae complete, radiating to the apex ( Bolivia: La Paz) .... C. orthocarinatus n. sp. - Metapostnotum with median carinae never complete nor radiating ( Argentina: Salta; Bolivia: Beni, Santa Cruz; Brazil; Mato Grosso do Sul, Minas Gerais, São Paulo; Paraguay: Alto Paraná, Caazapá, Caaguazú; Itapua; Paraná, San Pedro) ............................................................................................................................................ C. allostictus Moure 7 Lateral angle of pronotum acute, not projected ( Fig. 18 ) ( Argentina: Catamarca, La Rioja, Salta, Tucuman) ............. ....................................................................................................................................................... C. argentinus n. sp. - Lateral angle of pronotum very acute, projected to the head ( Fig. 20 )........................................................................ 8 8 Mesoscutal disc punctures regularly spaced, separated by one puncture diameter ( Brazil: Espírito Santo).................. ........................................................................................................................................................... C. culminis n. sp. - Mesoscutal disc punctures irregularly spaced, separated by 1–3 puncture diameters................................................ 9 9 Preoccipital ridge produced, curved upward almost forming a lamella; body with bluish reflections ( Bolivia: La Paz; Peru: Marcapata) .......................................................................................................................... C. ischnotes (Vachal) - Preoccipital ridge not produced; body without bluish reflections ( Argentina: Iguassu; Brazil: Paraná, São Paulo) ..... ............................................................................................................................................................... C. nitidus n.sp.

Males

(males of C. ischnotes (Vachal) , C. nitidus n. sp., C. orthocarinatus n. sp. are unknown)

1 S4 homogeneously hairy ( Fig. 3 ); S5 without transverse thickening ( Fig. 4 ) ............................................................. 2

- S4 with a well-defined central patch of hair ( Fig. 5 ); S5 with transverse thickening ( Fig. 6 ) .................................... 4

2 Head as long as wide, with an elongated appearance ( Fig. 27 ); posterior surface of propodeum with few branched erect setae, most setae not branched ................................................................................................ C. camargoi n. sp.

- Head wider than long, with a rounded appearance (as in Figs. 25, 26, 28–31 ); posterior surface of propodeum with several branched erect setae ......................................................................................................................................... 3

3 Metapostnotum posterior margin semicircular, carinae almost straight; disc of T1–T3 with bluish reflections, poste- rior marginal area with apical black stripe ...................................................................................... C. argentinus n. sp.

- Metapostnotum posterior margin triangular, carinae sinuous; disc of T1–T3 darkened, posterior marginal area entirely black ................................................................................................................................... C. clonius (Brèthes)

4 Mesoscutal disc with contiguous punctures; median carinae of metapostnotum strongly sinuous................................ .................................................................................................................................................... C. psoraspis (Vachal)

- Mesoscutal disc punctures not contiguous; median carinae of metapostnotum variable in shape.............................. 5

5 Lateral angle of pronotum acute, not projecting ........................................................................... C. allostictus Moure

- Lateral angle of pronotum very acute, projecting to the head ..................................................................................... 6

6 Preoccipital ridge not lamellate; mesoscutum micro-reticulate; metapostnotal carinae strongly sinuous .................... ........................................................................................................................................................... C. culminis n. sp.

- Preoccipital ridge lamellate; mesoscutum without micro-reticulation; metapostnotal carinae weakly sinuous ............ .......................................................................................................................................................... C. stigon (Vachal)

Figures

FIGURES 17 – 24. Mesoscutum of Ceratalictus species (females): (17) C. allostictus Moure; (18) C. argentinus sp. n. (arrow indicates the acute pronotal angle); (19) C. clonius (Brèthes) (arrow indicates the obtuse pronotal angle); (20) C. ischnotes (Vachal) (arrow indicates the acute pronotal angle, project to the head); (21) C. nitidus sp. n.; (22) C. orthocarinatus sp. n.; (23) C. psoraspis (Vachal); (24) C. stigon (Vachal). Scale bar = 0.5 mm.

FIGURES 13 – 16. Faces of Ceratalictus species (females): (13) C. nitidus sp. n.; (14) C. orthocarinatus sp. n.; (15) C. psoraspis (Vachal); (16) C. stigon (Vachal). Scale bar = 1 mm.

FIGURES 7 – 12. Faces of Ceratalictus species (females): (7) C. allostictus Moure; (8) C. argentinus sp. n.; (9) C. camargoi sp. n.; (10) C. clonius (Brèthes); (11) C. culminis sp. n.; (12) C. ischnotes (Vachal). Scale bar = 1 mm.

FIGURES 3 – 6. Male metasomal sterna 4 and 5: (3) C. argentinus n. sp.: S 4; (4) C. argentinus n. sp.: S 5; (5) C. psoraspis (Vachal): S 4; (6) C. psoraspis: S 5. Scale bar = 0.5 mm. Legend: cp—central patch of setae; tt = transverse thickening.

FIGURES 25 – 31. Faces of Ceratalictus species (males): (25) C allostictus Moure; (26) 2 C. argentinus sp. n.; (27) C. camargoi sp. n.; (28) C. clonius (Brèthes); (29) C. culminis sp. n., 30) C. psoraspis (Vachal), 31) C. sti; gon (Vachal). Scale bar = 1 mm.