Gracilaclopus caceresi Ocampo & Mondaca

Ocampo, Federico C. & Mondaca, José, 2012, Revision of the scarab subfamily Aclopinae Blanchard (Coleoptera: Scarabaeidae) in Argentina and Chile, Zootaxa 3409, pp. 1-29 : 9-10

Gracilaclopus caceresi Ocampo & Mondaca , new species

( Figs. 8–9 , 24 , 31 )

Diagnosis. This species is distinguished from the other species of Gracilaclopus by the following combination of characters: labral apex deeply indented in middle; head black, body light brown with scutellum same color as elytra (light brown); pronotum with a transversal row of setae in middle on each side of disc, setae sparse, long; size <5 mm; male genitalia as Fig. 24 .

Description. Holotype male. Length 4.07 mm, width 1.57 mm. Color: Head black, pronotum and elytra light brown; legs, antennae, and mouthparts brown; ventral surface brown. Head ( Fig. 8 ): Frons flat on apical half, convex at base, surface sparsely punctate, glabrous. Clypeus strongly transverse; lateral margins oblique; anterior margin straight, slightly reflexed, frontal area of anterior margin oblique; frontoclypeal suture obsolete, surface densely punctate. Labral shape subrectangular in dorsal view apex strongly indented in middle, strongly reflexed, glabrous. Pronotum ( Fig. 9 ): Surface sparsely punctate, with one row of sparse setae on each side of disc; setae long, slender. Marginal bead present in all margins, reduced on posterior margin at middle. Anterior angle nearly right-angled; posterior angles broadly rounded. Scutellum: Triangular , apex rounded, surface punctate at base, smooth at apex. Elytra: Surface punctate, punctures sparse, setose, setae moderately long. Legs: Mesotibiae and metatibiae with two transverse carinae. Mesotibial and metatibial apex with fringe of spine-like setae. Male genitalia ( Fig. 24 ): Parameres las long as phallobase, curved at middle; apex rounded not club-like.

Type material: Holotype male at IAZA labeled: “ ARGENTINA: San Juan / Salinas de Mascasín. 423 m / S 31°25’39”, W 67°04’05” / XII-12-2003. F. C. Ocampo”; “ Gracilaclopus / caceresi / Ocampo & Mondaca / HOLO- TYPE ” (red label). Paratypes (all male). Seventeen paratypes (11 at IAZA [three in 95% Et-OH], three FVMC, three JMEC) labeled as holotype except: “ Gracilaclopus / caceresi / Ocampo & Mondaca / PARATYPE ” (yellow label).

Type locality. Argentina, San Juan, Salinas de Mascasín (31°25’39”S, 67°04’05”W).

Etymology. We take great pleasure in naming this species after senior author’s friend José María Cáceres.

Distribution ( Fig. 31 ). ARGENTINA. San Juan: Salinas de Mascasín (18).

Temporal distribution. December (18).

Figures

FIGURE 31. Distribution map of Gracilaclopus bidentulus, G. caceresi, G. c a n d e l a r i a e, and G. crepuscularis.

FIGURES 8 – 9. Gracilaclopus caceresi, male.

FIGURES 23 – 30. 23) Male genitalia of G. bidentulus, aedeagus lateral view; 24) G. c a c e re s i, aedeagus lateral view; 25) G. candelariae, aedeagus lateral view; 26 a – b) G. crepuscularis, aedeagus lateral and frontal views respectively; 27 a – c) G. electricus, a – b) aedeagus lateral and frontal views, c) ventral plate of the genital segment; 28) G. m o ro c h u s, aedeagus lateral view; 29) G. nigroscutatus, aedeagus lateral view; 30) G. parvulus, aedeagus lateral view.