Aegidium bordoni 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 : 1078-1079

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

( Figure 14 (a–g))

Type locality

Venezuela, Aragua, Rancho Grande National Reserve.

Type material examined

Holotype, male at CEMT labeled ‘P. Nac. Rancho Grande , m.1100 (Edo.Aragua)/ 18-V-1968 Bordon leg.’ ( Figure 14 (b)). Paratypes. COLOMBIA. one male at MNHN labeled ‘ Colombia / La Ferte. 5657.’. VENEZUELA. Aragua: one female at RMNHL labeled ‘ Museum Leiden Venezuela Rancho Grande AR. 15.XI.1958 P H v Doesburg jr’; one male and one female at BGCO labeled ‘ Venez: Aragua Rancho Grande 4.VII-9.VIII.86 B. Gill 1150m’; one female at CMN labeled ‘ Ven: Araugua; 1200m Maracay, Rancho Grande , 1–10.VIII.87 cloud forest FIT, Gordon & Peck’.

Additional material examined

Two female specimens are provisionally identified as Ae. bordoni and not included in the type series. VENEZUELA. Carabobo: two females at CMN, Borburata River , August 1943, R. Lichy leg .

Diagnosis

Aegidium bordoni sp. nov. is most similar to Ae. columbianum but can be separated from it by shorter parameres with less protruding lateral teeth and endophallus without hookshaped sclerites.

Description

Holotype, male ( Figure 14 (a,d–f)). Body length 17.0 mm. Colour uniformly brown.

Anterior margin of frontoclypeus slightly convex in middle, slightly sinuate each side of medial convexity, rounded laterally, slightly upturned. Frontoclypeus punctate with rounded punctures separated by 1–2 puncture diameters.

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

Pronotum with widely rounded lateral margins, wider than elytra, 1.6 times wider than length, 0.55 times length of elytra. Posterior angles widely rounded, indistinct. Anterior margin bordered, border interrupted medially and not reaching anterior angles. Base of pronotum without furrow, punctate with a row of large, rounded, punctures separated by about 1 puncture diameter. Pronotal disc deeply excavated, with flattened area mediobasally. Lateral pronotal processes long, horn-shaped in lateral view, protruding past lateral margin outline of pronotum in dorsal view. Pronotum with lateral processes minutely impunctate, medial excavation punctate with sparse rounded punctures.

Scutellum narrow subtriangular, about 1/12 length of elytra.

Elytra 1.2 times longer than wide, with humeral and apical umbones. Elytra widest in basal 1/3, tapering apically in dorsal view. Elytral carinae feebly distinct. Elytra covered with relatively sparse rounded punctures separated by 2–3 puncture diameters at sides and somewhat denser, elongate punctures on disc.

Macropterous.

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

Aedeagus with relatively long (0.5 times length of phallobase), parameres ( Figure 14 (d)). Apices of parameres widened in dorsal view and curved downwards. Parameres as wide as apical part of phallobase in dorsal view ( Figure 14 (e)). Ventrobasal transverse plate of parameres distinct. Lateral teeth of parameres protruding past paramere outline in dorsal view ( Figure 14 (e)). Endophallus without strongly sclerotised sclerites. Cranial part of spiculum gastrale relatively narrow, parallel-sided, rounded apically ( Figure 14 (f)).

Female ( Figure 14 (c)) differs from male in having protibial spur and relatively smaller pronotum without armature but with shallow longitudinal excavation, and in the absence of the inner protibial tooth.

Variation

Male paratypes have body length of 16.5 and 17.0 mm and are similar to the holotype in all characters except that one specimen has smaller prothoracic processes. Length of the females is 12.5–14.0 mm.

Distribution

Aegidium bordoni sp. nov. is known from a few localities in Venezuelan Andes (Cordillera de la Costa) ( Figure 14 (g)).

Etymology

The new species is named after Carlos Bordon (El Limon, Venezuela), who collected the holotype.

Figures

Figure 14. Aegidium bordoni, holotype male (a, 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).