Cyclidius elongatus ( Olivier, 1789 )

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 : 1084-1085

publication ID

https://doi.org/10.1080/00222933.2025.2472439

persistent identifier

https://treatment.plazi.org/id/03E06914-A673-FFFB-1FD5-FF5E1AA643A0

treatment provided by

Plazi

scientific name

Cyclidius elongatus ( Olivier, 1789 )
status

 

Cyclidius elongatus ( Olivier, 1789) View in CoL

( Figures 9–12 View Figure 9 View Figure 10 View Figure 11 View Figure 12 , 19 View Figure 19 , 32 View Figure 32 (A, D, G))

Cetonia elongata Olivier, 1789, p. 24 View in CoL (original combination)

Cremastocheilus elongatus ( Olivier, 1789) (new combination) by Gory and Percheron 1833: 111

Cryptodinus (Cyclidius) elongatus ( Olivier, 1789) (new combination) by MacLeay 1838: 17 Cyclidius elongatus ( Olivier, 1789) View in CoL (new combination) by Burmeister and Schaum 1841: 260

Taxonomic history

Olivier 1789, p. 24 (original description).– Latreille 1829: 572 (systematics).– Perty (1830 -1834- 1834):9 (taxonomic revision).– Gory and Percheron 1833:111 (taxonomic revision).– MacLeay 1838: 17–18 (new combination). – Burmeister and Schaum 1841: 260 (taxonomic revision). – Schaum 1841: 260 (taxonomic revision). – Blanchard 1850: 42 (catalogue). – Lacordaire 1856: 553 (redescription). – Westwood 1874: 54–55 (taxonomic revision). – Ohaus 1909: 73 (natural history). – Schenkling 1921: 378 (Catalogue). – Blackwelder 1944: 265 (catalogue). – Howden 1971 (key to the genera of Cremastocheilini ). – Martínez 1992: 44 (distribution). – Krajčik 1999: 42 (catalogue). – Suárez-G. and Amat-García 2007 (catalogue). – Mynhardt and Wenzel 2010: 134 (phylogeny). – Carvajal et al. 2011: 297 (catalogue). – Di Iorio 2013: 62 (distribution and references).– Drechsel 2014: 61–63 (distribution). – Alves-Oliveira et al.2016 (natural history).– Rodrigues et al. 2023 (catalogue). – Schoolmeesters 2024 (catalogue).

Diagnosis

Cyclidius elongatus is recognised by the following combination of characters: Clypeus bidentate anteriorly in females, with a concavity between the tips ( Figures 11 View Figure 11 (C)–12(C)); males bears a trapezoidal clypeus raised anteriorly, with no tips ( Figures 9 View Figure 9 (C)–10(C)); and the protibia has a medial-proximal tooth ( Figures 9 View Figure 9 (D)–10(D)), which is absent in females ( Figures 11 View Figure 11 (D)–12(D)).

Redescription

Male. Size: length: 24.2– 24 mm; width: 12– 11.6 mm. Colour: Body dorsally black, elytra opaque black with glossy black ( Figure 9 View Figure 9 (A, E)) or glossy reddish orange in the centre ( Figure 10 View Figure 10 (A, E)). Head: Clypeal projection trapezoidal and bent upwards in frontal view, with slight sinuosity ( Figure 9 View Figure 9 (C)–10(C)); frons with a longitudinal elevation in the centre, connecting the front part of the clypeus; velutinous behind the two tubercles posteriorly; mentum shallowly concave centrally. Pronotum: Velutinous surface, lateral margin with incomplete border. Elytra: Velutinous surface on lateral parts of the elytral disc and glossy punctate centrally. Thoracic venter: Metaventrite: ‘C’-punctate opaque or velutinous laterally. Metepisternum: ‘C’-punctate, opaque or velutinous. Legs: Protibia: Enlarged centrally, with medial-proximal tooth ( Figures 9 View Figure 9 (D)–10(D)). Abdomem: Ventrites ‘c’-punctate. Aedeagus: Parameres curving dorsad, each apex rounded, with callus proximally, before central membranous portion ( Figure 9 View Figure 9 (G, H)).

Sexual dimorphism

Female size: length: 25.3– 22.4 mm; width: 12.5– 11.1 mm. Female with clypeal projection bent upwards in frontal view, bidentate, with a concavity between the tips ( Figures 11 View Figure 11 (C)–12(C)); protibia without medial-proximal tooth ( Figures 11 View Figure 11 (D)– 12(D)).

Morphological variation

The elytral centre can be glossy black ( Figures 9 View Figure 9 (A, E), 11(A, E)) or reddish orange ( Figures 10 View Figure 10 (A, E), 12(A, E)). There is a single female from Óbidos (Pará, Brazil) without the two posterior tubercles present on the frons.

Geographical distribution

Cyclidius elongatus is known from Brazil, French Guiana, Guyana, and Suriname in the north-east of the Amazon Forest in the biogeographical provinces of Guiana Lowlands, Roraima, and Xingu-Tapajós, with a doubtful record from Ecuador ( Figure 19 View Figure 19 ).

Remarks

The label data of one of the specimens, placing Cyclidus elongatus in Ecuador, is questionable due to its divergence from other known localities. This species does not have the broad distribution seen in Cyclidius lacordairei . Westwood (1874) mentions Cyclidius plagiatus Dejean 1837 ( nomen nudum) as a synonym of Cyclidius elongatus .

Type specimens examined (n = 1)

Lectotype (here designated): ( Figures 32 View Figure 32 (A, D)) Labels [1: handwritten and printed on red label with black margin] ‘ LECTOTYPE Cetonia elongata Ol. ♀ des. F.Z.Vaz-de-Mello, 2014’ ( 1 ♀ at MNHN) .

Non-type specimens examined (n = 15)

BRAZIL (5): Pará: Maloca Tiryó, Rio [River] Parú de Oeste , i–iii .1961 ( 1 ♀ MPEG); Óbidos , 1956, F .M. Oliveira ( 1 ♂ DZUP); Óbidos , vi .1956, F.M. Oliveira ( 1 ♀ MZSP); Óbidos , vii .1956, F.M. Oliveira ( 1 ♀ CMNC); Óbidos , iv .1959, F.M. Oliveira ( 1 ♀ MZSP); Óbidos , Rio Amazonas, 7 .ix .1965 ( 1 ♂ DZUP) ; GUYANA (4): Demerar, Coll Cutt/Collection Candeze ( 2 ♀ IRSNB); New River . 750 ft. 25 .i .–20.iii.1938. C.A. Hudson/Brit.Mus. 1939–370 ( 1 ♂ BMNH). Schomburgk leg . ( 1 ♀ MFNB) . ECUADOR [doubtful data] (1): ex coll Bonneuil ( 1 ♀ IRSNB) . FRENCH GUIANA (2): [Cayenne]: [Wayabo], Piste des Singes Y . Ponchel ( 1 ♂ CMNC); [Wayabo] Piste des Singes Rouge , Y . Ponchel ( 1 ♂ CMNC) . SURINAM (1): Just V. leg . ( 1 ♀ IRSNB) . NO DATA (01): ( 1 ♂ KPC 327 ) .

MNHN

Museum National d'Histoire Naturelle

MPEG

Museu Paraense Emilio Goeldi

DZUP

Universidade Federal do Parana, Colecao de Entomologia Pe. Jesus Santiago Moure

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

IRSNB

Institut Royal des Sciences Naturelles de Belgique

MFNB

Museo Friulano di Storia Naturale

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Scarabaeidae

Genus

Cyclidius

Loc

Cyclidius elongatus ( Olivier, 1789 )

Rodrigues, Diego F., Grossi, Paschoal C. & Vaz-de-Mello, Fernando Z. 2025
2025
Loc

Cryptodinus (Cyclidius) elongatus ( Olivier, 1789 )

Burmeister H & Schaum H 1841: 260
MacLeay WS 1838: 17
1838
Loc

Cremastocheilus elongatus ( Olivier, 1789 )

Gory MH & Percheron MA 1833: 111
1833
Loc

Cetonia elongata

Olivier AG 1789: 24
1789
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