Cyclidinus peruanus ( Moser, 1910 ), 2025

Rodrigues, Diego F., Grossi, Paschoal C. & Vaz-de-Mello, Fernando Z., 2025, Taxonomic revision of Cremastocheilini (Coleoptera: Scarabaeidae: Cetoniinae) from South America and an updated key for the genera of the New World, Journal of Natural History 59 (17 - 20), pp. 1063-1125 : 1076-1077

Cyclidinus peruanus ( Moser, 1910) comb. n.

( Figures 5 , 6 )

Genuchinus peruanus Moser, 1910, p. 366 (original combination)

Taxonomic history

Moser 1910, p. 366 (original description). – Schenkling 1921, p. 377 (catalogue). – Blackwelder 1944, p. 265 (catalogue). – Krikken 1981, p. 407 (taxonomic revision). – Krajčik 1999, p. 42 (catalogue). – Di Iorio 2013 (catalogue, appendix). – Schoolmeesters 2024 (catalogue).

Diagnosis

Cyclidinus peruanus is recognised by the following combination of characters: Body covered with black velutinous coating, with the pronotal margin outlined by golden macules, some of which are also present on the head and elytra ( Figures 5 (A, C, E–F)); clypeal projection bent upwards, wide and slightly sinuous in frontal view; mentum with posterior margin broadly ‘V’-shaped ( Figure 5 (B)) and not thickened.

Redescription

Size: length: 13.5– 12 mm; width: 7.2– 6.5 mm. Colour: Body covered with a black velutinous surface, pronotal margin outlined by golden macules, with some golden macules also on the head and elytra ( Figure 5 (A)); ventrally black, with some golden velutinous macules on the thorax, legs, and abdomen ( Figure 5 (B)). Head: Clypeal projection bent upwards, wide and slightly sinuous in frontal view; clypeolateral declivity weakly sloping down; scape with a line of setae along the posterior margin. Mentum with posterior margin broadly ‘V’-shaped ( Figure 5 (B)) and not thickened. Pronotum: Edge bordered by golden velutinous coating; shallow longitudinal groove present in the middle, forming a line of ocellate-punctuations ( Figure 5 (C)). Elytra: With some golden spots on the disc and two distinct arrow-shaped velutinous macules ( Figures 5 (A, E–F)). Pygidium: Without two parallel protuberances at the centre.

Morphological variation

Golden spots variable on surface.

Geographical distribution

Cyclidinus peruanus is known from Amazon Forest of central Peru, in the Rondonia biogeographical province, in a transition region with Yungas biogeographical province ( Figure 6 ).

Remarks

The new combination proposed here is mainly based on the shape of the pronotum, as well as the overall shape, which is less flattened than that of Genuchinus and has a more velutinous covering. Additionally, the shape of the protibia and mentum is more similar to that of Cyclidinus . These diagnostic characters support the proposed combination.

Type specimens examined (n = 1)

Lectotype. (designated by Krikken 1981): ( Figure 5 ) Labels [1: printed text on white label] ‘ Peru, Rio Oxabamba , La Merced Chanchamayo’ /[2: handwritten text in black on cream label] ‘peruanus Type Mos’./[3: printed text on yellow label] ‘Zool. Mus. Berlin’/[4: printed text on red label] ‘ Typus ’/[5: handwritten text in blue on white label] ‘Photo [?]jl79’/[6: printed text on red label] ‘ SYNTYPUS Genuchinus peruanus Moser 1910 labelled by MNHUB 2013’. (1 ♀ at MFNB) .

Non-type specimens examined (n = 1)

PERU (01): JUN, II .2006 D Ribeira rec/ 30 km Satipo Rio Verde 1100–1200 m /CERPE 0000006 (1 ♀ CERPE).

Figures

Figure 5. Cyclidinus peruanus (Moser, 1910) comb. n. Lectotype of Genuchinus peruanus Moser, 1910. Female at MFNB (Peru, Junín, Chanchamayo, La Merced). (A) Habitus, dorsal view. (B) Habitus, ventral view. (C) Pronotum, dorsal view. (D) Protibia, dorsal view. (E) Habitus, dorsolateral view. (F) Habitus, lateral view. (G) Labels. Scale bars = 1 mm.

Figure 6. Geographical distribution map of Cyclidinus lugubris Westwood, 1874 and Cyclidinus peruanus (Moser, 1910).