Amblycerus cuernavacensis Romero, Johnson & Kingsolver, 1996

Santos, Aluska Tavares Dos & Ribeiro-Costa, Cibele Stramare, 2019, Rearrangements in some species groups of Amblycerus Thunberg, 1815 (Coleoptera: Chrysomelidae: Bruchinae) including keys, description of a new species, new host plant and distributional records, Zootaxa 4701 (2), pp. 101-148 : 130-131

Amblycerus cuernavacensis Romero, Johnson & Kingsolver, 1996

( Figs 18 , 27 , 42 , 55 , 72, 85, 104, 108, 120)

Amblycerus cuernavacensis Romero et al. 1996 (desc., type, distr., key); Romero et al. 2002 (phyl.).

Type material. The species was recognized through its original description and illustration of the male genitalia ( Romero et al. 1996). Specimen identified by Romero and Kingsolver (below) was also examined.

Additional specimens examined. [1 male specimen]: Ajijic, JAL., MEX.\ 13 May, 1964\ WLNutting\ at lt. 5140’; Amblycerus sp. ♀ [handwritten symbol]; Amblycerus \ cuernavacensis\ det. R. J. + K.\ J. M. Kingsolver; Amblycerus cuernavacensis \ Romero, Johnson and Kingsolver, 1996 \ Det.: A. T. Santos;\ C. S. Ribeiro-Costa, 2017. ( FSCA).

Measurements. BL: 6.8 mm; BW: 3.9 mm.

Diagnosis ( Figs 29 , 104 ). Amblycerus cuernavacensis is characterized by the following characters combination: pronotum subtrapezoidal in dorsal view with five dense strips of setae ( Fig. 55 ); internal sac of male genitalia with a pair of hollow, subquadrate, tuberculate sclerites in the apical region and median region with an unpaired trapezoidal sclerite ( Fig. 104 ). The species differs from A. spondiae by the lateral carina reaching the posterior margin of pronotum (almost reaching the posterior margin of pronotum in A. spondiae ), cervical boss with two setae (three setae in A. spondiae ) and scutellum tridentate with all teeth with about the same length (median tooth longer in A. spondiae ). Amblycerus cuernavacensis can be distinguished from A. alternatus by the distinct frontoclypeal suture (indistinct in A. alternatus ), lateral carina reaching the posterior margin of pronotum (almost reaching in A. alternatus ) and scutellum tridentate with all teeth with same length (median tooth longer than the lateral ones in A. alternatus ). Finally, the species can be distinguished from A. vitis by the subquadrate and tuberculate apical sclerite (subtriangular, non-tuberculated in A. vitis ) and in median region, where A. cuernavacensis has an unpaired, subtrapezoidal sclerite, whilst A. vitis has a long wishbone sclerite.

Distribution ( Fig. 120 ). Mexico.

Life History. No information was found on this species in the literature.

Host Plants. Unknown.

Figures

FIGURES 15–18. Dorsal, group spondiae: 15. A. alternatus, 16. A. cuernavacensis, 17. A. spondiae, 18. A. vitis. Scale bars = 1.0 mm.

FIGURES 22–27. Head, group dispar: 22. Amblycerus crassipunctatus, 23. A. dispar, 24. A. insuturatus, 25. A. schwarzi, 26. A. taeniopygus, 27. Amblycerus goianiensis Santos & Ribeiro-Costa, sp. n. Scale bars = 1.0 mm.

FIGURES 41–44. Lateral, group spondiae: 41. A. alternatus, 42. A. cuernavacensis, 43. A. spondiae and 44. A. vitis. Scale bars = 1.0 mm.

FIGURES 54–57. Pronotum, group spondiae: 54. A. alternatus, 55. A. cuernavacensis, 56. A. spondiae and 57. A. vitis. Scale bars = 1.0 mm.

FIGURES 28–31. Head, group spondiae: 28. A. alternatus, 29. A. cuernavacensis, 30. A. spondiae, 31. A. vitis. Scale bars = 1.0 mm.

FIGURES 103–106. Male genitalia, median lobe, group spondiae: 103. A. alternatus, 104. A. cuernavacensis, 105. A. spondiae and 106. A. vitis. Scale bars = 0.25 mm.

FIGURES 120–121. FIGURE 120. Map with the geographical distribution of A. alternatus and A. cuernavacensis. Leaked symbols refer to bibliography data. FIGURE 121. Map with the geographical distribution of A. spondiae and A. vitis. Leaked symbols refer to bibliography data.