Cyclidius atlanticus Rodrigues, Grossi

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 : 1081-1083

publication ID

https://doi.org/10.1080/00222933.2025.2472439

persistent identifier

https://treatment.plazi.org/id/03E06914-A674-FFF9-1F79-FEFE1B9D44A1

treatment provided by

Plazi

scientific name

Cyclidius atlanticus Rodrigues, Grossi
status

 

Cyclidius atlanticus Rodrigues, Grossi View in CoL and Vaz-de-Mello sp. n.

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( Figures 7–8 View Figure 7 View Figure 8 , 20 View Figure 20 )

Diagnosis

Cyclidius atlanticus sp. n. is recognised by the following combination of characters: Clypeus trapezoidal, raised anteriorly, with a slight sinuosity at the top ( Figures 7 View Figure 7 (C)–8 (C)), and it lacks a medial-proximal tooth on the protibia ( Figures 7 View Figure 7 (D)–8(C)).

Description

Holotype. Male. Size: length: 22.3 mm; width: 11.0 mm. Body: Elongate, dorsally flattened ( Figure 7 View Figure 7 (A, B, E–F)). Colour: Body dorsally black ( Figure 7 View Figure 7 (A)); ventrally dark reddish brown ( Figure 7 View Figure 7 (B)); palps and antennomeres brownish. Head: Frons rugose, with a central protuberance and two posterior tubercles; clypeal projection trapezoidal, bent upwards in frontal view, with slight sinuosity at the top ( Figure 7 View Figure 7 (C)); scape semitriangular. Mentum almost right angle-shaped, with posterior margin broadly ‘V’-shaped ( Figure 7 View Figure 7 (C)), rounded apically, thickened and anteriorly rounded and slightly convex, concave centrally, largely covering the mouthparts. Pronotum: Suborbicular, with a velutinous surface ( Figure 7 View Figure 7 (A)), inconspicuously punctate; lateral margin with border; longitudinal punctate line extending from the basomedian region to just before centre. Scutellum: Triangular, completly rugose. Elytra: Velutinous coating, inconspicuously ‘c’-punctate on the central disc and near elytral suture; lateral border immarginated. Thoracic venter: Hypomerum: Shallowly concave below the procoxa; surface rugose or convergently striate. Prosternum : Narrow anteriorly, forming a pointed projection, setose at the anterior base. Mesoventrite: rugose and confluently punctate. Mesepisternum: Rugose and punctate anteriorly. Mesepimeron: rugose. Metaventrite: punctate centrally, rugose near posterior margin, ‘c’-punctate and opaque laterally. Legs: Tarsomeres punctate, with the tarsomere V longer than others; tarsal claw as long as most tarsomeres. Protibia: Rugose, enlarged centrally, thin and concave posteriorly; three teeth on outer margin present, apical-lateral, ventro-apical and lateral-proximal ( Figure 7 View Figure 7 (D)); spur as long as protarsomeres I–III. Profemur: Rugose ventrally and differently punctate dorsally, with a central emargination. Mesotibia and metatibia dorsally flattened and rugose, ventrally differently punctate, with two pairs of apical teeth and one proximal, wih a superficially opaque and rugose concavity between the proximal tooth and one of the apical pairs; two spurs as long as meso-metatarsomeres I–II. Mesofemur and metafemur differently punctate. Procoxa and mesocoxa punctate, with setae on the procoxa. Metacoxa: Opaque and rugose. Abdomen: Ventrites ‘c’-punctate and opaque laterally; slight elevation around the spiracle of the last tergite, which is always visible. Pygidium: Convex, ocellate-punctate, opaque above and bright below. Aedeagus: Parameres curving dorsally, each apex rounded, with callus proximally, before the central membranous portion ( Figure 7 View Figure 7 (G, H)).

Sexual dimorphism

Female size: length: 20.6– 19.7 mm; width: 10.7– 9.7 mm. There is no concavity in the female protibia ( Figure 8 View Figure 8 (D)); male protibia larger than female. In males, pronotum is horizontally larger than in females.

Geographical distribution

Cyclidius atlanticus sp. n. is known only from the coast of Brazil, in the Atlantic Forest biogeographical province ( Figure 20 View Figure 20 ).

Etymology

The specific epithet ‘ atlanticus ’ refers to the Atlantic Forest that covers the east coast of Brazil and where the new species is probably distributed, represented so far by only three known specimens.

Type specimens examined (n = 3)

Holotype. ( Figure 7 View Figure 7 ) Labels : [ BRAZIL] [1: printed text on white label] ‘ Santa Maria Madalena, RJ, Faz. Babilônia, 19/III/2002, E. Mantoanelli col’/[2: printed and handwritten text on red label] HOLOTYPE Cyclidius atlanticus sp. n. ♂ Rodrigues, Grossi & F.Z. Vaz-de- Mello’ ( 1 ♂ at CEMT 00192377 ) . Paratypes (2): Labels : [1: printed text on white label] ‘CORUPA S . Catarina BRASIL XII-1952 A .MALLER’/[2: printed and handwritten text on yellow label] ‘ Cyclidius atlanticus sp. n. ♀ Rodrigues , Grossi & Vaz-de-Mello 2023 PARATYPE ’ ( 1 ♀ CEMT 00192378 ); [1: printed and handwritten text on white label] BRAZIL ESPIRITO SANTO FAZ . JERUSALEM 29 .VI .1912, J.F. Zikan”/[2: printed text on white label] ‘ColeÇão F. Zikan’/[3: handwritten text on white label] ‘ Cyclidius elongatus Latr. ’/[4: printed and handwritten text on yellow label] ‘ Cyclidius atlanticus sp. n. ♀ Rodrigues, Grossi & Vaz-de-Mello 2023 PARATYPE ’ ( 1 ♀ CEMT 00192379).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Scarabaeidae

Genus

Cyclidius

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