Golofa inermis Thomson, 1859

Ratcliffe, Brett C., Cave, Ronald D. & Mondaca, José, 2021, The Dynastine Scarab Beetles (Coleoptera: Scarabaeidae: Dynastinae) of Chile, The Coleopterists Bulletin 75 (2), pp. 279-309 : 296-298

Golofa inermis Thomson, 1859

( Figs. 34–37 )

Golofa inermis Thomson 1859: 11 (original combination).

Redescription. Length 20.0–25.0 mm; width 8.6–13.0 mm. Color uniformly dark yellowish brown or reddish brown except for black head, scutellum, sutural striae, tibiae, tarsi, pygidium, and venter. Head: Frons with moderately large, sparse punctures. Clypeus with erect, sharply acuminate tubercle; apex strongly narrowed, emarginate. Interocular width equals 2.7 transverse eye diameters. Antenna with 10 antennomeres, club slightly longer than antennomeres 2–7. Pronotum: Surface with punctures moderate in size and density.A shallow, short, longitudinal sulcus present just behind anterior margin. Base with marginal bead. Elytra: Surface with punctures moderate in size and density, shallow. Sutural stria a completely impressed line. Pygidium: Surface with punctures moderate in size and density. Propygidium lacking long, dense setae. Legs: Protibia tridentate, basal tooth removed from other teeth. Parameres: As in Fig. 36 .

Distribution. Golofa inermis occurs in Chile (the lectotype and three paralectotypes in MNHN) and Bolivia (two paralectotypes in MNHN).

Locality Records ( Fig. 37 ). 5 specimens from MNHN, Gutiérrez (1950), and Ferrú and Elgueta (2011) .

REGIÓN DE ARICA Y PARINACOTA (1): ARICA (1): Arica. REGIÓN DE TARAPACÁ (1): IQUIQUE (1): Miñita. NO DATA (3) .

Temporal Distribution. No data.

Diagnosis. The pronotum and elytra of G. inermis are monochromatic dark yellowish brown or reddish brown (except for the black elytral suture); the elytral suture is a complete, impressed stria; and the propygidium lacks long, dense setae. Conversely, G. minutus has dark areas on the pronotum, and the elytral margins are black; the elytral sutural stria is a row of closely spaced punctures; and the propygidium has long, dense setae. The parameres of the two species differ, with those of G. inermis being thicker and more robust (compare Figs. 36 and 40 ).

Nomenclature. Thomson (1859) indicated a size range when he described G. inermis , which clearly indicates he had at least two specimens. Endrödi (1977b) said the type of G. inermis was unknown to him, but Dechambre (1975) discovered the Thomson specimens in the MNHN and designated a lectotype ( Figs. 34–35 ) and five paralectotypes (three from Chile, two from Bolivia). We were unable to directly examine these specimens.

Natural History. Adults are attracted to lights, but we know nothing else of the species’ natural history.

Figures

Figs. 34–37. Golofa inermis. 34) Lectotype, MNHN-EC-2378; 35) Lectotype labels; 36) Parameres; 37) Distribution. Images in Figs. 34–35 courtesy of Antoine Mantilleri (Muséum National d’Histoire Naturelle, Paris, France).

Figs. 38–42. Golofa minutus. 38) Male, dorsal view; 39) Male, lateral view; 40) Parameres; 41) Female, dorsal view; 42) Female, lateral view. Photographs by Marcelo Guerrero (Santiago, Chile).