Deltochilum (Aganhyboma) ritamourae, 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 : 484-485

Deltochilum (Aganhyboma) ritamourae new species

( Figs 22 , 58 , 94 , 119 )

Etymology. Named in honour of Rita de Cássia de Moura, an enthusiast in the study of dung beetles and specialist in Scarabaeinae cytogenetics.

Description. Body. Head, pronotum, elytra and ventral surface with copper coloration and a reddish metallic sheen. Length 13.5 to 14.5 mm. Head. Foveiform punctures dense, touching on dorsal interocular surface. Punctures around clypeus shallower, smaller and more dispersed than those on interocular surface. Dorsal interocular distance approximately four times eye width. Lateral margin of gena strongly curved outward, with row of medium sized setae around the eyes. Thorax. Surface of pronotum with dense foveiform punctures, touching on the sides and anterior angles (however not as deep as in D. icariforme ). Density, size and proximity of anteromedial punctures similar to those on disk. Posteromedial punctures separated by at least one diameter. Margin between lateral and posterior angles straight. Elytra. Entirely copper and with a reddish metallic sheen ( Fig. 119 ). Lateral margin distinctly curved outward ( Fig. 119 ) 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 approximately six microtubercles. Interstrial surface 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 three or four times seventh interestria width. Basal carina of ninth interstria extending 3/4 or more along elytral length. Apical carina of third interstria rounded, better defined as tubercle, more prominent than apical carinae of second and fourth interstriae. Length of apical carina of sixth interstria longer than that of apical carina of fifth interstria. Length of apical carina of seventh interstria less than or equal the sum of lengths of apical carinae of fifth and sixth interstriae. Pseudepipleural carina complete, visible entire length of epipleuron (as in Fig. 63).

Material studied. Holotype: BRAZIL: MINAS GERAIS: Águas Vermelhas, XII.1998, A. Bello & F. Z. Vazde-Mello (1 ♂ CEMT).

Paratypes [26]: BRAZIL: BAHIA: [no data] (1 MNHN); Encruzilhada, XI.1972, M. Alvarenga (1 ♀ CEMT); same, XII.1980, A. Martínez & M. Alvarenga (1 ♀ CMN); same, XII.1995, P. Arnaud (12 ♂ 3 ♀ CEMT); CEARÁ: Carquejo, Dirings (1 ♂ MZUSP); MINAS GERAIS: Águas Vermelhas, XII.1997, F.Z. Vaz-de-Mello (1 ♂ CEMT); same, Faz. Faceiro, 15°23'56"S, 41°23'57"W, 12.XII.2012, JARafael & EJGrossi, Ar. luz. 850 m (2 INPA); Montes Claros, I.2002, G.L.D. Leite (1 ♂ CEMT); Fronteira Minas/Bahia, 14.II.1977, Celso Jr. (1 ♂ CEMT); PIAUÍ: São Raimundo Nonato, Parque Nacional Serra da Capivara, 4.XII.1998, C.A.R. Matrangolo (1 ♀ CEMT); SERGIPE: Poço Redondo, MONA Grota do Angico, (9°41'S, 38°31'W), 28–30.IV.2013, Maual, Santos- Júnior (1 CEMT).

Sampling methods. at light [8 specimens].

Habitat. Brazil (Bahia, Ceará, Minas Gerais and Piauí) ( Fig. 94 ). From the available data this species occurs mainly in semi-arid domain of Brazil.

Diagnosis and remarks (within the icariforme subcomplex): length 13.5 to 14.5 mm; body completely cooper and with a reddish metallic sheen ( Fig. 119 ); length of apical carina of seventh interstria less than or equal the sum of lengths of apical carinae of fifth and sixth interstriae; elytral lateral margin distinctly curved outward. The following aedeagus characters are also diagnostic: parameres symmetric and elongate, in lateral view forming an angle of approximately 45° with phallobase; apex acuminate ( Fig. 22 ). Fronto-lateral peripheral sclerite (FLP) as in Fig. 58 .

In some specimens, apical carina of third interstria weaker than apical carina of second and fourth interstriae.

Figures

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 55 – 58. Fronto-lateral peripheral sclerite (FLP) in D. (Aganhyboma). 55. D. valgum. 56. D. kolleri new species. 57. D. icariforme. 58. D. ritamourae new species. Figure 59. Complex of axial and subaxial sclerites (A + AS) in D. viridescens new status. Figures 60 – 61. Head in D. (Aganhyboma). 60. D. viridescens new status. 61. D. longiceps new status. Figures 62 – 63. Lateral view of the elytra in D. (Aganhyboma). 62. D. viridescens new status (arrow points the basal carina of ninth interstria). 63. D. finestriatum new species. (arrow points the basal carina of ninth interstria). Figures 64 – 69. Legs. 64. Metafemur in D. viridescens new status. 65. Metafemur in D. longiceps new status. 66. Protibia in D. trisignatum. 67. Metatibia in D. trisignatum. 68. Metatibia in D. viridescens new status. 69. Profemur in D. trisignatum (arrow indicates the anterior margin discontinuous). 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.