Deltochilum (Aganhyboma) streblopodum, 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 : 474-475

Deltochilum (Aganhyboma) streblopodum new species

( Figs 91 , 109 )

Etymology. Streblopodum (crooked + legs), Latin adjective, refers to the posterior tibiae of individuals, which are curved.

Description. Body. Head, pronotum, elytra and ventral surface black or dark brown, with an evident sheen. Length <13 mm. Head. Punctures extremely dense, almost touching; foveiform punctures separated at dorsal interocular surface by half diameter or less. 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; margin with central portion clearly convex. Dorsal interocular distance approximately three times eye width (as in Fig. 61). Thorax. Surface of pronotum with dense foveiform punctures, nearly touching on the sides, anterior angles and posterior portion. Discal punctures somewhat smaller and more dispersed than those of lateral portion. Density, size and proximity of anteromedial punctures similar to those on disk. Posteromedial punctures separated by one diameter or less. Margin between anterior and lateral angles with row of small setae. Margin between lateral and posterior angles with length somewhat smaller than that of margin between anterior and lateral angles. Hypomera with dense foveiform punctures at anterior portion and absent at posteromedial portion. Diagonal band of hypomera from posteromedial portion to middle of lateral margin lacking punctures or with one or two isolated punctures on otherwise smooth surface (as in Fig. 83 ). Elytra. Lateral margins slightly curved outward ( Fig. 109 ) and surface slightly irregular (rugose). Elytral striae with carinate margins clearly separated. Interstriae flattened, with foveiform punctures surrounded by approximately four well-defined shiny microtubercles. Microtubercles with sheen more evident than surrounding surface. Foveiform punctures separated on elytral disc by one diameter or less. Basal carina of seventh interstria elongate, length about four times the width of the seventh interestria. Basal carina of ninth interstria with approximately one-half of elytral length. Apical carina or tubercle of second elytral interstria absent. Apical carina of third interstria weaker than apical carina of fourth interstria. 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 the sum of lengths of apical carinae of fifth and sixth interstriae. Pseudepipleural carina incomplete, effaced medially (as in Fig. 80). Aedeagus. The specimen examined presented the aedeagus weakly sclerotized, without defined morphology.

Material studied. Holotype: BRAZIL: AMAZONAS: Barcelos, Igarapé Erere/Coruja, (00°06'16"N, 63°51'01"W), 18–25.VI.2008, F.F. Xavier (1 ♂ INPA).

Sampling methods. at light-trap [1 specimen].

Habitat. Brazil (Amazonas) ( Fig. 91 ), from available data this species inhabits Amazon rainforest.

Diagnosis and remarks (within the acropyge complex): margin of pronotum between lateral and posterior angles narrower than that between anterior and lateral angles; diagonal band of hypomera lacking punctures or with one or two isolated punctures on otherwise smooth surface (as in Fig. 83 ); apical carina or tubercle of second elytral interstria absent; elytral striae with round punctures; pseudepipleural carina incomplete, effaced medially (as in Fig. 80).

Figures

FIGURES 89 – 92. Known distribution of D. (Aganhyboma). 89. trisignatum complex. 90. cupreicolle complex. 91. acropyge complex. 92. finestriatum complex.

FIGURES 103 – 110. Species of D. (Aganhyboma). 103. D. viridescens new status. 104. D. viridicatum new species. 105. D. viridicatum new species. 106. D. acropyge new status. 107. D. feeri new species. 108. D. schefflerorum new species. 109. D. streblopodum new species. 110. D. longiceps new status. Figures scale = 1 mm.

FIGURES 81 – 83. Illustrations of hypomera in D. (Aganhyboma). 81. D. schefflerorum new species. 82. D. arturoi new species. 83. D. longiceps new status. Figure 84. Right elytron of D. longiceps new status (arrows indicate the irregular spacing among the points of the elytral striae). Figure 85. Pronotum in D. icaroides. Figure 86. Apex of third interestria in D. subrubrum new species. Figures 87 – 88. Detail of the apical tubercle of third interstria in D. (Aganhyboma). 87. D. icaroides. 88. D. valgum.