Cyclidiellus velutinus ( Westwood, 1874 )

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 : 1068-1071

publication ID	https://doi.org/10.1080/00222933.2025.2472439
persistent identifier	https://treatment.plazi.org/id/03E06914-A663-FFE5-1FF9-FF1C1B264082
treatment provided by	Plazi
scientific name	Cyclidiellus velutinus ( Westwood, 1874 )
status

Treatment

Cyclidiellus velutinus ( Westwood, 1874) View in CoL

( Figures 1 View Figure 1 (C), 2, 3, 31(A, D))

Cyclidinus velutinus Westwood, 1874, p. 204 View in CoL (original combination).

Cyclidiellus velutinus ( Westwood, 1874) View in CoL : (new combination) by Krikken 1976: 313.

Taxonomic history

Westwood 1874, p. 204 (original description). – Westwood 1878: 30 (redescription). – Schenkling 1921 (catalogue). – Blackwelder 1944: 265 (catalogue). – Krikken 1976: 311–313 (new combination). – Krajčik 1999: 43 (catalogue). – Rodrigues et al. 2023 (catalogue). – Schoolmeesters 2024 (catalogue).

Redescription

Size: length: 16.9 mm; width: 8.4 mm. Body: Elongate, dorsally flattened. Surface glabrous. Colour: Body dorsally and ventrally black, opaque; palps and antennomeres dark brown, shiny. Eyes black. Head: Clypeus slightly bent upwards in frontal view; frons almost entirely ocellate-punctate, with some rugose areas; antegenal protusion evident, eye-canthus superficially rugose; scape semitriangular, with setae laterally; mentum dilated, rounded ( Figure 2 View Figure 2 (B)), posterior margin open ‘V’-shaped, anteriorly rounded and slightly convex centrally, largely covering the mouthparts. Pronotum: Disc with wide, rounded sides medially, posterolateral emargination, narrowing posteriorly ( Figure 2 View Figure 2 (C)); posterolateral angle rounded off but distinct; posterior margin broadly rounded; surface evenly convex, fully ocellate-punctate, rugose in some parts near margin. Scutellum: Triangular, surface with large ocellate punctures centrally, discrete punctures or rugose anteriorly. Elytra: Disc elongate, remarkably flat, slightly transverse at the anterior margin, rounded posteriorly ( Figure 2 View Figure 2 (A, F–G)); one humeral and one anteapical umbone on each elytron; apical angle of elytral suture rounded off. Surface fully ocellate-punctate, and differently punctate, with oval punctures and two central points, mainly in central area of the disc ( Figure 2 View Figure 2 (I)). Thoracic venter: Hypomerum: Shallowly concave below the procoxa; surface ocellate-punctate and rugose. Prosternum : Narrow anteriorly, forming a pointed projection, setose in anterior region. Mesoventrite: surface ocellate-punctate, often with short setae projected from central edge of the punctures. Mesepisternum: Ocellate-punctate. Mesepimeron: Surface ocellate-punctate, occasionally with short setae emanating from central edge of the puncture; slightly visible dorsally. Metaventrite, metepisternum and metepimeron fully ocellate-punctate, with short setae on the central edge of punctures. Legs: Remarkably long and slender; all tarsal segments subcylindrical, with tarsomere V as long as the other two combined; tarsomeres ocellate-punctate with short setae on the central edge of the punctures. Protibia superficially rugose, with occasional short setae; one apical spur and four teeth: one apical-lateral, one ventro-apical, and two lateral-proximal ( Figure 2 View Figure 2 (D, E)). Profemur ocellate-punctate and rugose, setose in some areas. Mesotibia shorter than metatibia, both dorsally flattened ( Figure 2 View Figure 2 (B)), surface ocellate-punctate, with short setae emanating from the central edge of punctures and rugose; two apical spurs, two pairs of apical teeth, and one proximal on mesotibia, with a concave surface, opaque, and rugose between the proximal and apical regions of mesotibia. Metafemur wider than mesofemur, both ocellate-punctate with setae centrally on the punctures ( Figure 2 View Figure 2 (B)). Procoxa: Rugose with setae, as are the trochanters. Mesocoxa and metacoxa ocellate-punctate with setae centrally on the punctures. Abdomen: Fully ocellate-punctate with setae centrally on the punctures ( Figure 2 View Figure 2 (B)); propygidial elevation more or less conical around the spiracle of the last visible tergite ( Figures 2 View Figure 2 (A, F)). Pygidium: Convex, ocellate-punctate, with two parallel drepessions next to the last spiracle. Aedeagus: See Figure 2 View Figure 2 (H).

Sexual dimorphism

The protibiae of females ( Figure 2 View Figure 2 (E)) are wider than those of males ( Figure 2 View Figure 2 (D)), and the apical tooth is thinner in males.

Morphological variation

The patterns of punctuation on the body surface may be better marked in some specimens than in others, as well as the presence of velutinous marks.

Geographical distribution

Cyclidiellus velutinus is known from Brazil, in the Atlantic Forest biogeographical province ( Figure 3 View Figure 3 ).

Natural history

Bionomics unknown, but association with social insects suspected ( Krikken 1976).

Remarks

Although there is a country label on one of the specimens, we do not think this species actually occurs in Mexico. The mislabelling is probably linked to another species of

Cremastocheilini View in CoL from that location with the same specific epithet as this one, Genuchinus velutinus Westwood, 1874 View in CoL .

Type specimens examined (n = 1)

Holotype. ( Figures 31 View Figure 31 (A, D)) Labels [1: printed text on red label] ‘Type’/[2: printed text on cream label] ‘TYPE SP’/[3: printed text on white label with black margin] ‘Ex. Musaeu’/[4: handwritten text on red label] ‘ Cyclidinus velutinus Westw [?] Type [?]’/[5: handwritten text on blue label] ‘ Cyclidinus velutinus Westw’/[6: printed and handwritten text on white label] ‘Col. Ceton. Det. J. Krikken 1974 ni. Jk7411-1’ (1 at MNHN).

Non-type specimens examined (n = 3)

BRAZIL (2): Espirito Santo: RMNH . INS 1486074 ( 1 ♀ RMNH) . no data: RMNH. INS 1486075 ( 1 ♂ RMNH) . MEXICO (probably wrong locality) (1): (1 MFNB) .