Deltochilum (Aganhyboma) icaroides Balthasar 1939

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 : 481-483

Deltochilum (Aganhyboma) icaroides Balthasar 1939 new subgeneric placement

( Figs 18 , 31 , 39 , 48, 85, 87, 93, 117)

Deltochilum (s. str.) icaroides Balthasar 1939: 10 (original description) Deltochilum icaroides: Blackwelder 1944: 203 (checklist)

Roze 1955: 43 (checklist)

Génier 2001: 4 (comments about type locality)

Deltochilum (s. str.) icarioides: Lane 1947: 109 (taxonomic comments) Deltochilum (Deltohyboma) icaroides: Martínez 1959: 54 (catalogue) Vulcano & Pereira 1964: 655 (catalogue)

Vulcano & Pereira 1967: 557 (identification key) Vaz-de-Mello 2000: 192 (checklist)

Description. Body. Head, pronotum, elytra and ventral surface black or dark brown, with an opaque or silky sheen. Length 12.8 to 13.5 mm. Head. Foveiform punctures extremely dense, usually touching on the dorsal interocular surface. Punctures around clypeus shallower, smaller and more dispersed than those on the interocular surface. Lateral margin of gena, around eyes, without row of setae or with almost inconspicuous setae. Dorsal interocular distance approximately four times eye width. Thorax. Surface of pronotum with dense foveiform punctures, nearly touching on the sides, anterior and posterior angles (Fig. 85). Discal punctures somewhat smaller and more dispersed than those of lateral portion. Anteromedial punctures smaller and more dispersed than discal punctures. Posteromedial punctures usually separated by less than one diameter. Margin between anterior and lateral angles with row of small setae. Hypomera with dense foveiform punctures on anterior and posterior portions; foveiform punctures almost touching. Elytra. Lateral margins slightly curved outward ( Fig. 117 ) and surface slightly irregular (rugose). Elytral striae wider, carinate margins clearly separated (as in Fig. 75). Interstriae slightly convex; however, always less convex than that of the icariforme subcomplex. Interstriae with foveiform punctures over entire surface. Elytral microtubercles almost inconspicuous, sometimes blending in with remainder of interstria surface. Basal carina of seventh interstria elongate, length about four times the width of the seventh interestria. Basal carina of ninth interstria present in three-quarters of elytra, but it never reaches the anterior limit of apical carina of seventh interstria. Apical carina of third interstria somewhat more prominent than apical carinae of second and fourth interstriae (Fig. 87). 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 to 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 ( NMPC) [examined] ♀: 1. [white label, printed in black]. San Bernardino / A. Fischer S. G. / 8. 1912; 2. [white label, handwritten and printed in black]. Deltochilum / icariformis / Ohs. in litt. / dr. V. Balthasar det.; 3. [red label, handwritten]. Typus; 4. [red label, printed in black]. HOLOTYPE; 5. [white label, printed in black]. Type; 6. [green label, bordered in black, handwritten]. icaroides / m. See also Bezděk & Hájek (2011).

The holotype has the following locality data on the label: «San Bernardino, A. Fischer, S. G., 8.1912». In the original description, the author supposes that this location is in Venezuela ( Balthasar 1939). However, Génier (2001) believes that the specimen is from San Bernardino, Paraguay, because he examined an individual, according to him, identical to the type, from Villarica, Paraguay.

Non-type material [44]: ARGENTINA: MISIONES: Loreto (1 ♀ MZUSP); Loreto, A. Uglobin (1 ♀ CEMT); P. N. Iguazú, 6.I.1991, S. & J. Peck (1 ♀ CMN); Puerto Iguazú, X.1997 (1 ♀ CEMT). BOLIVIA: SANTA CRUZ: Chiquito, Santiago de Chiquito, (18º19´S, 59º34´W), 11.XI.2008, T. Vidaurre (1 ♂ 2 ♀ MNKM, 3 ♂ 1 ♀ CEMT); same, (18°20.103'S, 59°35.007'W), XI.2008, W.D.E. Edmonds & T. Vidaurre (7 ♂ 2 ♀ WDEC); 5km SSE Buena Vista, Hotel Flora e Fauna, (17°29.925'S, 63°39.128'W), 15.XII.2003, S. & J. Peck (1 ♂ CMN). BRAZIL: GOIÁS: [anonym] (2 ♀ MZUSP); MINAS GERAIS: Rio Doce, 5.III.1940 (1 ♀ MZUSP); MATO GROSSO: Chapada dos Guimarães, 14.XI.2008, S.P. Rosa, F. Fernandes, J. Almeida & R. Kawada (2 ♀ CEMT); Diamantino, Alto Rio Arinos, X.1999, E. Furtado (1 ♂ CEMT); same, II.2001, E. Furtado (1 ♂ CEMT); Nossa Senhora do Livramento, Distrito de Pirizal, 15.X.2009, D. D. Pinheiro (1 ♀ CEMT); Rosário Oeste, XI.1959 (2 ♀ DZUP); same, XI.1963, Alvarenga & Werner (1 ♀ MZUSP); same, II.1969 (1 ♀ DZUP); MATO GROSSO DO SUL: Bodoquena, Ass. Canaã, (20°46.267'S, 56°46.038'W), XI.2009, F. O. Roque (1 ♂ 1 ♀ CEMT); Corumbá, Serra do Urucum, (19°13'S, 57°33'W), 23.XI.1960, K. Lenko (1 ♀ DZUP); SÃO PAULO: Batatais, XII.1940 (1 ♀ MZUSP); Pres. Epitácio, J. Lane (1 ♂ MZUSP). PARAGUAY: CANINDEYÚ: Lagunita, Res. Nat. Bosque Mbaracayú, 10.XI.1996, C. F. Costa (1 ♀ CMN); Salto del Guaira, Melgarejo, 10.X.1994, Drechsel (1 ♂ CEMT); GUAIRA: Villarrica, XI.1928, F. Schade (2 ♀ CEMT); same, 23.XII.1946, (1 ♀ MZUSP); Cerro Acati, XI.1993, Drechsel (1 ♀ CEMT).

Sampling methods. baited pitfall trap with injured diplopods [16 specimens].

Habitat. Argentina, Bolivia, Brazil (Goiás, Minas Gerais, Mato Grosso, Mato Grosso do Sul and São Paulo) and Paraguay ( Fig. 93 ). From available data this species inhabits mainly the Cerrado domain. The elevation data ranges from 622 to 750 m AMSL.

Diagnosis and remarks (within the valgum complex): length 12.8 to 13.5 mm; foveiform punctures near the posteromedial portion of pronotum usually separated by less than one diameter; elytral interstriae with homogeneous and dense foveiform punctures over entire surface; elytral surface with an opaque or silky sheen; apical carina of third interstria somewhat more prominent than apical carinae of second and fourth interstriae (Fig. 87). The following aedeagus characters are also diagnostic: parameres symmetric and elongate; in lateral view forming an angle of approximately 45° with phallobase; apex rounded ( Fig. 18 ). Genital segment as in Fig. 31 . Lamella copulatrix (LC): left and right lobes as in Fig. 39 . Superior right peripheral sclerite (SRP) as in Fig. 48. Fronto-lateral peripheral sclerite (FLP) as in Fig. 55 .

Some specimens exhibit apical carina of sixth interstria shorter than carina of fifth interstria.

Figures

FIGURES 12 – 19. Aedeagus in Deltochilum (Aganhyboma). 12. D. schefflerorum new species. 13. D. acropyge new status. 14. D. larseni new species. 15. D. acanthus. 16. D. longiceps new status. 17. D. valgum. 18. D. icaroides. 19. D. kolleri new species. Figures scale = 1 mm.

FIGURES 28 – 32. Genital segment in Deltochilum (Aganhyboma). 28. D. finestriatum new species. 29. D. schefflerorum new species 30. D. valgum. 31. D. icaroides. 32. D. icariforme. Figures 33 – 36. Lamella copulatrix sclerites in D. (Aganhyboma). 33. D. cupreicolle. 34. D. viridescens new status and D. viridicatum new species 35. D. trisignatum. 36. D. finestriatum 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.

FIGURES 111 – 118. Species of D. (Aganhyboma). 111. D. acanthus. 112. D. arturoi new species. 113. D. larseni new species. 114. D. cangalha new species. 115. D. alpercata new species. 116. D. finestriatum new species. 117. D. icaroides. 118. D. valgum. Figures scale = 1 mm.

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

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.