Deltochilum (Aganhyboma) paresi, Silva, Fernando A. B., Louzada, Júlio & Vaz-De-Mello, Fernando, 2015

Silva, Fernando A. B., Louzada, Júlio & Vaz-De-Mello, Fernando, 2015, A revision of the Deltochilum subgenus Aganhyboma Kolbe, 1893 (Coleoptera: Scarabaeidae: Scarabaeinae), Zootaxa 3925 (4), pp. 451-504 : 486-487

Deltochilum (Aganhyboma) paresi new species

( Figs 3 , 20 , 94 , 121 )

Etymology. Named in honour of the indigenous people of the “Chapada dos Parecis”, known as the “ Paresi ”, from region where the specimens were collected.

Description. Body. Head, pronotum, elytra and ventral surface dark brown with green or copper metallic sheen. Length 16 to 16.5 mm. Head. Foveiform punctures dense and deep, touching on dorsal interocular surface. Dorsal interocular distance approximately three times eye width (as in Fig. 61). Lateral margin of gena strongly curved outward, with row of setae around eyes. Thorax. Surface of pronotum with deep and dense foveiform punctures, touching on the sides and anterior angles. Anteromedial punctures more dispersed than those of surrounding surface. Posteromedial punctures usually separated by less than one diameter. Margin between lateral and posterior angles straight. Elytra. Lateral margin distinctly curved outward ( Fig. 121 ) and surface slightly irregular (rugose). Elytral striae wider, carinate margins clearly separated (as in Fig. 75). Interstriae clearly convex, with its central portion nearly flat. Interstrial surface with foveiform punctures surrounded by microtubercles weakly defined. Interstriae usually more punctate on sides, close to striae. Foveiform punctures of third interstria denser laterally (punctures can be so scattered at center of interstria to produce smooth midlongitudinal strip) (as in Fig. 86). Basal carina of seventh interstria elongate, length about four or more times seventh interestria width. Basal carina of ninth interstria surpassing anterior limit of apical carina of seventh interstria. Apical carina of third interstria more prominent than apical carinae of second and fourth interstriae. Apical carina of sixth interstria longer than apical carina of fifth interstria. Length of apical carina of seventh interstria longer than the sum of lengths of apical carina of fifth and sixth interstriae. Pseudepipleural carina complete, visible entire length of epipleuron (as in Fig. 63).

Material studied. Holotype: BRAZIL: MATO GROSSO: Nova Marilândia, (14°20'56.27"S, 57°42'40.02"W), II.2008, R.J. Silva (1 ♂ CEMT).

Paratypes [4]: BRAZIL: MATO GROSSO: Nova Marilândia, (14°20'56.27"S 57°42'40.02"W), II.2008, R.J. Silva (1 ♀ CEMT); same, (14°19'41.37"S, 57°45'1.52"W), II.2008, R.J. Silva (1 ♂ CEMT); same, (14°20'11.36"S, 57°44'44.17"W), R.J. Silva (1 ♂ 1 ♀ CEMT).

Sampling methods. un-baited pitfall traps [5 specimens].

Habitat. Brazil (Mato Grosso) ( Fig. 94 ). Two specimens with label data "Campo Sujo" (Cerrado) and three specimens with "Cerrado s. str." The elevation data ranges from 522 to 613 m AMSL.

Diagnosis and remarks (within the icariforme subcomplex): length 16 to 16.5 mm; length of apical carina of seventh interstria longer than the sum of lengths of apical carina of fifth and sixth interstriae; basal carina of ninth interstria surpassing anterior limit of apical carina of seventh interstria. The following aedeagus characters are also diagnostic: parameres symmetric and elongate, directed downward, almost at an angle of 90° with phallobase; apex acuminate ( Fig. 20 ). Lamella copulatrix (LC): left lobe subtrapezoidal (as in Fig. 40 ); right lobe subrectangular (as in Fig. 40 ). Superior right peripheral sclerite (SRP) as in Fig. 3 .

The lateral elytral margin is the most curved between species of the icariforme subcomplex. In some specimens, apical carina of third interstria can be somewhat more prominent than apical carina of second and fourth interstriae, with a rounded form, resembling a tubercle. Apical carina of seventh interstria presents the largest length among the species of the valgum group.

Figures

FIGURES 1 – 3. Male genital sclerites in Deltochilum (Aganhyboma). 1. Position and nomenclature of endophallic sclerites (modified from Medina et al. 2013). 2. Nomenclature of the main parts of the genital segment (D. amandaarcanjoae new species). 3. Nomenclature of the main parts of the superior right peripheral sclerite (SRP) (D. paresi new species). Figures scale = 1 mm.

FIGURES 20 – 23. Aedeagus in Deltochilum (Aganhyboma). 20. D. paresi new species. 21. D. icariforme. 22. D. ritamourae new species. 23. D. subrubrum new species. Figure 24. Aedeagus illustration showing the angle between the phallobase and the parameres. Figures 25 – 27. Genital segment in Deltochilum (Aganhyboma). 25. D. cupreicolle. 26. D. viridescens new status. 27. D. trisignatum. Figures scale = 1 mm.

FIGURES 93 – 94. Known distribution of D. (Aganhyboma). 93. D. icaroides and D. valgum. 94. icariforme subcomplex.

FIGURES 119 – 123. Species of D. (Aganhyboma). 119. D. ritamourae new species. 120. D. icariforme. 121. D. paresi new species. 122. D. kolleri new species. 123. D. subrubrum new species. Figures scale = 1 mm.

FIGURES 37 – 41. Lamella copulatrix sclerites in D. (Aganhyboma). 37. D. longiceps new status. 38. D. valgum. 39. D. icaroides. 40. D. icariforme. 41. D. subrubrum new species. Figures 42 – 49. Superior right peripheral sclerite (SRP) in D. (Aganhyboma). 42. D. titovidaurrei new species. 43. D. viridescens new status. 44. D. trisignatum. 45. D. finestriatum new species. 46. D. acropyge new status. 47. D. valgum. 48. D. icaroides. 49. D. kolleri new species. Figures 50 – 54. Fronto-lateral peripheral sclerite (FLP) in D. (Aganhyboma). 50. D. cupreicolle. 51. D. viridescens new status. 52. D. trisignatum. 53. D. finestriatum new species. 54. D. schefflerorum new species. Figures scale = 1 mm.