Cyclidius rohdei Kolbe, 1893

Cyclidius rohdei Kolbe, 1893 View in CoL

( Figures 17 View Figure 17 , 18 View Figure 18 , 20 View Figure 20 )

Cyclidius rohdei Kolbe, 1893, p. 212 View in CoL (original combination)

Taxonomic history

Kolbe 1893, p. 212 (original description). – Schenkling 1921: 378 (catalogue). – Blackwelder 1944: 265 (catalogue). – Krajčik 1999: 42 (catalogue). – Di Iorio 2013: 62–82 (catalogue, appendix). – Rodrigues et al. 2023 (catalogue). – Schoolmeesters 2024 (catalogue).

Diagnosis

Cyclidius rohdei is recognised by the following combination of characters: Clypeal projection semicircular and bent upwards in frontal view ( Figures 17 View Figure 17 (C)–18(C)), occasionally straight or slightly sinuous at the apex, without tips. The disc of the mentum is straight centrally. In males, the protibia has a medial-proximal tooth ( Figure 17 View Figure 17 (D)), wich is absent in females ( Figure 18 View Figure 18 (D)).

Description

Male. Size: length: 23.7– 19 mm; width: 11.3– 9.3 mm. Colour: Body dorsally black, with elytra opaque black and glossy black in the centre and border. Head: Clypeal projection semicircular and bent upwards in frontal view ( Figure 17 View Figure 17 (C)), occasionally straight or slightly sinuous apically; frons slightly elevated centrally; mentum straight centrally. Pronotum: Velutinous coating or glabrous opaque, with a complete lateral border. Elytra: Velutinous coating or glaborus opaque, glossy in parts of the centre and the border frequently, with punctures near the elytral suture. Thoracic venter: Metepisternum: Velutinous coating or glabrous, opaque or glossy, and ‘c’-punctate. Legs: Protibia: enlarged centrally with a medial-proximal tooth ( Figure 17 View Figure 17 (D)). Aedeagus: Parameres curve dorsally, with rounded apices and callus before the central membranous portion ( Figure 17 View Figure 17 (G, H)).

Sexual dimorphism

Female size: length 19.5– 18.1 mm; width: 9.7– 9.1 mm. Females without medial-proximal tooth in the protibia ( Figure 17 View Figure 17 (D)).

Morphological variation

Some specimens may lack the central elevation on the frons. One female has few shallow depressions in the pronotum, being irregular. Some males from Rio Ichilo ( Bolivia) are larger and have pronotum wider longitudinally . A specimen from Santa Cruz de La Sierra ( Bolivia) has a clypeal projection trapezoidal, instead semicircular . Additionally , a specimen from Ribeirão Preto ( Brazil) has a narrower pronotum .

Geographical distribution

Cyclidius rohdei is known from northern Argentina, Bolivia, Brazil, and Paraguay, comprising biogeographical provinces of Cerrado, Paraná Forest, Rondônia, and Yungas ( Figure 20 View Figure 20 ).

Natural history

Drechsel (2014) reported the behaviour of thanatosis in Cyclidius rohdei (although the specimen was misidentified as Cyclidius elongatus ) from Paraguay. The species was associated with a dry branch of undergrowth.

Type specimens examined (n = 1)

Holotype: ( Figure 18 View Figure 18 ) Labels [1: handwritten in black on a cream label] ‘Ascurisal Matto Grosso [ Brazil, Mato Grosso, Acorizal ]’/[2: printed on cream label] ‘ Coll. Thieme’ /[3: handwritten in black on a cream label] ‘ Cyclidius rohdei n. sp. Kolb’./[4: printed on cream label] ‘64,025’/[5: printed on yellow label] ‘Zool. Mus. Berlin’/[6: handwritten in blue on a white label] ‘Photo jl[?]79’/[7: printed on red label with black border] ‘Typus’/[8: printed on red label] ‘ HOLOTYPUS Cyclidius rohdei Kolbe, 1893 labelled by MNHUB 2013’/[9: handwritten and printed on white label] ‘ Cyclidius rohdei ♀ Det. D.F. Rodrigues, 2023 ’ ( 1 ♀ MFNB).

Non-type specimens examined (n = 9)

ARGENTINA (1): Misiones : Iguazú, Pto Libertad, i .1958 ( 1 ♀ CMNC) . BOLIVIA (7): Ost Bolivien, Steinbaoh S . V. ( 1 ♀ MFNB) ; Santa Cruz: Santa Cruz de la Sierra ( 1 ♂ MFNB); Santa Cruz, x .1949 ( 1 ♂ CMNC); Ichilo , Rio Ichilo, J . Steinbach-leg; ( 2 ♂ CMNC); Ichilo, Buena Vista , xi .1987, Col . Robin Clark ( 1 ♀ CMNC); Buena Vista, Hotel Flora and Fauna , 14–20 .xi .2008, Galileo, Vanin and Martins col ( 1 ♀ MZSP) . BRAZIL (1): São Paulo: Ribeirão Preto , campus USP, 21°11 ʹ S, 47°43 ʹ W, 20 GoogleMaps .vii GoogleMaps .1999, F. Zanella ( 1 ♂ MZSP) .

Other locations (n = 1): PARAGUAY (1): Canindeyú, Mbaracayú , 24°08 ʹ S, 55°31 ʹ W, 17 GoogleMaps . iii GoogleMaps . 2013 ( 1 ♂ Drechsel 2014).