Aegidium peruanum Frolov, Akhmetova

Frolov, Andrey V., Akhmetova, Lilia A. & Vaz-de-Mello, Fernando Z., 2017, Revision of the mainland species of the Neotropical genus Aegidium Westwood (Coleoptera: Scarabaeidae: Orphninae), Journal of Natural History 51 (19 - 20), pp. 1035-1090 : 1071-1072

Aegidium peruanum Frolov, Akhmetova and Vaz-de-Mello, sp. nov.

( Figure 9 (a–g))

Type locality

Peru, Satipo.

Type material examined

Holotype, male at IOCRJ labeled ‘ Satipo Huancayo-PERU 19.IX.1940 Paprzycki/ColeÇÃo J. F. Zikan’ ( Figure 9 (b)) . Paratype, female at UNMSM labeled ‘ Perú: СU. La Convención, Echarate, Pagoreni Norte 73°1 ʹ 31 ʺ /11°39 ʹ 27 ʺ 387m. 23–25.xi.2011 P.Sanchez’.

Diagnosis

Aegidium peruanum sp. nov. is similar to Ae. atlanticum in having a complex shape of the parameres with feebly sclerotised processes, but differs in the shape of these processes and in the shape of the inner mesotibial spur which is shorter than the basal mesotarsomere and not curved downwards.

Description

Holotype, male ( Figure 9 (a,d–f)). Body length 14.0 mm. Colour uniformly dark brown.

Anterior margin of frontoclypeus slightly convex in middle, slightly sinuate each side of medial convexity, with strongly protruding anterior angles, without distinct border or slightly upturned. Frontoclypeus punctate with irregular elongate punctures giving surface rugose appearance.

Eyes relatively large: width about 1/7 distance between eyes in dorsal view.

Pronotum with widely rounded lateral margins, as wide as elytra, 1.5 times wider than length, 0.5 times length of elytra. Posterior angles rounded. Anterior margin without distinct border, rugosely punctate. Base of pronotum with a shallow furrow punctate with a row of large, rounded, almost adjoining punctures. Pronotal disc excavated in anterior 2/3. Lateral pronotal processes triangular in lateral view, their apices not protruding past lateral margins of pronotum in dorsal view. Pronotum punctate with large dense rounded punctures except for lateral processes and areas lateral of each process.

Scutellum narrow subtriangular, about 1/11 length of elytra.

Elytra 1.25 times longer than wide, with distinct humeral and apical umbones. Elytra widest in basal 1/3, slightly tapering apically in dorsal view. First elytral carina distinct basally, second indistinct. Elytra covered with relatively dense elongated punctures on disc and apically and with rounded punctures on sides.

Macropterous.

Mesotibiae without tuft of setae ventroapically. Inner apical spur of mesotibia shorter than basal mesotarsomere and not curved downwards.

Aedeagus with relatively large (0.6 times length of phallobase, wider than phallobase in lateral view) parameres of complex shape, with a pair of feebly sclerotised processes ( Figure 9 (d,e)). Ventrobasal transverse plate of parameres indistinct. Ventroapical part of phallobase excavated and rugose. Endophallus without strongly sclerotised sclerites. Cranial part of spiculum gastrale relatively wide, tapering, asymmetric apically ( Figure 9 (f)).

Female paratype ( Figure 9 (c)) differs from male in having a relatively smaller, convex pronotum without flattened area and without anterior pronotal process, and in the absence of inner protibial tooth. Body length 12 mm.

Distribution

Aegidium peruanum sp. nov. is known from two localities in the eastern foothills of the Peruvian Andes, Junín and Cusco regions ( Figure 9 (g)). Both localities are situated on the border of the Peruvian Yungas and Southwest Amazon moist forest ecoregions.

Etymology

The name of the new species is derived from the name of the country, Peru.

Remarks

The paratype female agrees with the holotype in the body size, punctation, and the shape of the frontoclypeus; however, additional material is needed to confirm their conspecificity.

Figures

Figure 9. Aegidium peruanum, holotype male (a, b, d–f), paratype female (c). Habitus in dorsal view (a, c), labels (b), aedeagus in lateral view (d), parameres in dorsal view (e), spiculum gastrale (f), locality map (g).