Desertaclopus atacamensis 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 : 21-22

Desertaclopus atacamensis Ocampo & Mondaca , new species

( Figs. 33, 34 , 42 , 43 )

Diagnosis. This species is distinguished from other species of Desertaclopus based on the following combination of characters: distance between clypeal and frontal carinae (at middle) as long as or smaller than the distance between clypeal apical margin and clypeal carina; size> 10 mm; male genitalia as Fig. 42 .

Description. Holotype male. Length 6.44 mm, width 3.27 mm. Color: Head, pronotum black; elytra brown on disc black on margins; legs, antennae, and mouthparts brown; ventral surface brown to black. Head ( Fig. 33 ): Eye canthus well developed, apex slightly reflexed, bearing 4–5 setae, setae short; fronto-canthal carina present. Eyes well developed, rounded, not divided by eye canthus. Frons flat on apical half, convex at base with well developed transversal carina, carinae slightly depressed in middle; surface smooth, glabrous. Clypeus strongly transverse; lateral margins rounded; anterior margin rounded; frontoclypeal suture developed as carina; carina with setae, setae moderately long, slender; clypeal surface sparsely punctate. Distance between clypeal and frontal carinae (at middle) as long as or smaller than the distance between clypeal apical margin and clypeal carina. Labral shape semicircular in dorsal view apex rounded, reflexed, glabrous. Mandibular outer margin broadly sinuate externally, concave dorsoventrally, lacking incisory teeth, molar area poorly developed, ventral surface moderately setose, setae long. Labium as long as wide, strongly reduced, labial palp with three palpomeres, palpomere 3 as long as 1–2 combined; labial surface setose, setae dense to moderately dense, long and slender. Maxillae poorly developed, maxillary palp with four palpomeres. Antennae with eight antennomeres. Pronotum ( Fig. 34 ): Convex, wider than long. Surface sparsely punctate, glabrous, except for margins. Marginal bead present in all margins; anterior margin concave, with deep furrow, membrane well developed; lateral and posterior margins broadly rounded. Anterior angle nearly right-angled; posterior angles broadly rounded. Scutellum: Subtriangular , apex rounded, surface punctate at base, smooth at apex. Elytra ( Fig. 34 ): Convex, longer than wide, lateral margins rounded. Surface punctate, punctures sparse, glabrous. Elytral striae absent, except for sutural striae. Ve n te r: Surface setose, setae long; ventrites 3–5 membranous on apical margin. Pygidium not exposed beyond elytral margin, triangular, surface sparsely setose; setae long, slender. Legs ( Fig. 34 ): Protibiae with two teeth, protibial spur not developed. Mesotibiae and metatibiae with one transverse carina. Mesotibial apex with fringe of thick setae, metatibial apex with small setae. Metatibia robust, apical width 2/3 as long as tibiae. Mesotibial spurs contiguous, metatibial spurs apart. Metatibial tarsal insertion with notch, notch associated with tibial process. Tarsus longer than tibiae. Protarsomeres, mesotarsomeres, and metatarsomeres 1, 5 longer than 2, 3, 4 individually; all tarsi with long, apical setae. Protarsal claws curved, simple, symmetrical. Male genitalia ( Figs. 42 a–b): Parameres longer than phallobase, slightly curved, simple, symmetrical, apex rounded, club-like.

Type material. Holotype male at MNNC labeled: “ CHILE / Atacama / Vallenar / Carrizal Bajo / XII-1989 / H. Vásquez Col.” “ Desertaclopus / atacamensis / Ocampo & Mondaca / HOLOTYPE ” (red label). Two male paratypes (1 IAZA, 1 LEULS) labeled as holotype except for: “ Desertaclopus / atacamensis / Ocampo & Mondaca / PARATYPE ”. Seven male paratypes (3 AUPC, 1 CMNC, 2 MNNC, 1 UNSM) labeled: “ CHILE / Copiapó / Bahía Inglesa / Rocas Negras / 18-I-1998 / A. Ugarte Col.”. Paratypes (all male). Three paratypes (1 MNNC, 1 MACN, 1 UCCC) labeled: “ CHILE / Copiapó / Bahía Inglesa / 7-IV-1981 / G. González Col.” Four paratypes (2 JEBC, 2 JMEC) labeled: “ CHILE / Copiapó prov. / 37 Km W Copiapó; inland dunes, 171 m; malaise trap / 27°21.02’S, 70°38,73’W / 16 nov/ 20 dic 2003 / M.E. Irwin & F.D. Parker Legs. One paratype at JMEC labeled: “ CHILE / Atacama / Bahía Salada / 25-I-1991 / M. Guerrero Coll.” One paratype ( CMNC) labeled: “ CHILE / Atacama / Posada Cacerón / G. Arriagada Leg. / Coll. Martínez / 14-X- 992”. One paratype ( CUMCE) labeled: “ CHILE / Copiapó / Puerto Viejo / 16-X-2000 / J. Mondaca E. Coll.”. One paratype ( IAZA) preserved in 95% ethanol labeled: “ CHILE. Reg. Atacama / Cruce ruta 5 Norte / Puerto Viejo / Chañares / 24-01-2010 / Ruiz-Manzanos, Mondaca, Alfaro”. Eight paratypes (4 JMEC, 1 IAZA, 1 JEBC, 1 LEULS, 1 VMDC) labeled: “ Chile, Atacama / Bahía Cisne, 1-II- 2011, F. Alfaro coll.” Nineteen male paratypes (5 LEULS, 2 IAZA, 1 MNNC, 1 UCCC, 1 MACN, 1 CUMCE, 1 CMNC, 1 UNSM, 6 JMEC) labeled: “ CHILE ATACAMA / Playa Blanca, Huasco / 28°11’11.57’’S, 71°09’36.19’’W, 15 m / 18-II-2012, F.M. Alfaro coll.”. One paratype ( JMEC) labeled: “ CHILE ATACAMA / Puerto de Caldera / 16-XII-2011 / col. A. Fajardo”. All paratypes labeled: “ Desertaclopus / atacamensis / Ocampo & Mondaca / PARATYPE ” (yellow label).

Remarks. Only males are known, and they vary in length (3.90–5.30 mm) and slightly in color, (some specimens have darker elytral margins than others).

Etymology. The species name refers to the type locality Atacama in Chile.

Distribution ( Fig. 43 ). CHILE: Atacama: Bahía Cisne (8), Bahía Inglesa (10), Bahía Salada (1), Carrizal Bajo (3), Copiapó, 37 km W (4), Cruce Ruta 5 Norte/Puerto Viejo (1), Posada Caserón (1), Puerto Viejo (1).

Temporal distribution. January (9), February (27), April (3), October (2), November/December (5), December (3).

Figures

FIGURE 43. Distribution map of Desertaclopus atacamensis, D. lucasi, and D. marcosi.

FIGURES 33 – 34. Desertaclopus atacamensis, male.

FIGURES 40 – 42. 40 a – c) Male genitalia of Desertaclopus lucasi, a – b) aedeagus lateral and frontal views, c) ventral plate of the genital segment; 41 a – b) D. marcosi, aedeagus lateral and frontal views; 42 a – b) D. atacamensis, lateral and frontal views.