Deltochilum (Aganhyboma) feeri, 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 : 472-473

Deltochilum (Aganhyboma) feeri new species

( Figs 91 , 107 )

Etymology. Named in honour of François Feer, an excellent scarab ecologist who was responsible for collecting a large number of the type specimens.

Description. Body. Head, pronotum, elytra and ventral surface black or dark brown, with a silky sheen ( Fig. 107 ). Length <14 mm. Head. Punctures dense and almost touching; around clypeus shallower, smaller and more dispersed than those on the dorsal 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. Punctures of pronotal disc more dispersed than those of lateral portion. Density, size and proximity of anteromedial punctures similar to those on disk. Posteromedial punctures usually separated by less than one diameter. Margin between anterior and lateral angles with row of small setae. Margin between lateral and posterior angles with approximately the same length of margin between anterior and lateral angles. Hypomera with foveiform punctures dense at anterior, median and posterior portions; punctures of anteromedial portion nearly touching. Diagonal band of hypomera from posteromedial portion to middle of lateral margin with obvious punctures. Elytra. Lateral margins slightly curved outward, and elytral 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 apparent 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 (as in Fig. 80). 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).

Material studied. Holotype: FRENCH GUIANA: Nouragues, II.2001, F. Feer (1 ♂ CEMT).

Paratypes [10]: GUIANA: Isherton, 14.XI.1931 (2 ♀ MZUSP). TRINIDAD AND TOBAGO: Tunapuna, Mt. St. Benedict, 21.VI.1993, S. & J. Peck (1 ♀ CMN). FRENCH GUIANA: Cayenne, (4°48'18"N, 28°52'41"W), 9.VI.1997, J. Ashe & R. Brooks (1 ♀ CMN); Nouragues, II.2001, F. Feer (1 ♂ CEMT); same, III.2002, F. Feer (1 ♂ CEMT); same, III.2006, F. Feer (1 ♂ CEMT). SURINAM: SIPALIWINI DIST.: Kwamalasamutu region, Sipaliwini River (Werehpai), 02°21'N, 56°41'W, CI RAP, 3–7.IX.2010, T. Larsen, 250m (1 ♂ CEMT); same but Kutari River, 02°10'N, 56°47'W, ~250masl. CI RAP Survey, 18–24.VIII.2010 (1 ♂ AFIC); same but CI RAP 3 sites between 02°21'N, 56°41'W and 02°10'N, 56°47'W. ~250masl, VIII–IX.2010 (1 ♀ AFIC).

Sampling methods. flight interception trap [2 specimens].

Habitat. Guyana, French Guiana and Trinidad and Tobago ( Fig. 91 ). One specimen with label data "Summit Rain Forest".

Diagnosis and remarks (within the acropyge complex): length <14 mm; foveiform punctures of head almost touching, separated in dorsal interocular surface by about half diameter; posteromedial punctures of pronotum usually separated by less than one diameter; anteromedial punctures of hypomera nearly touching; apical carina or tubercle of second elytral interstria absent; pseudepipleural carina incomplete, effaced medially (as in Fig. 80).. Hypomera punctures in individuals of this species, as well as in D. acropyge and D. schefflerorum new species, are the most dense of acropyge complex.

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.