Chiridopsis spadix ( Spaeth, 1917 ), Spaeth, 1917

Świ, Jolanta, 2017, A monograph of the Afrotropical Cassidinae (Coleoptera: Chrysomelidae). Part 4. Revision of the genus Chiridopsis Spaeth, Zootaxa 4316 (1), pp. 1-85: 55-56

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Chiridopsis spadix ( Spaeth, 1917 )


Chiridopsis spadix ( Spaeth, 1917)  

( figs 15 View FIGURE 15 , 115–118 View FIGURES 115 – 119 )

Chirida spadix Spaeth, 1917: 441   .

Chiridopsis spadix: Spaeth, 1924: 351   ; Borowiec, 1999: 304.

Description. Le: 4.90–6.00 mm, Wi: 4.20–5.05 mm, Lp: 1.80–2.10 mm, Wp: 2.95–3.50 mm, Le/Wi: 1.17–1.26, Wp/Lp: 1.64–1.67.

Pronotal disc black ( figs 115, 116, 118 View FIGURES 115 – 119 ), often also basal part of explanate margin close to base of disc narrowly black, rest of explanate margin yellow. Sometimes black basal spot with narrow, yellow cleft on anterior margin. Scutellum reddish or black with reddish central spot. Elytral disc black, in basal half usually with large reddish, cordiform spot ( fig. 115 View FIGURES 115 – 119 ), sometimes the spot extends to 2/3–3/4 length of disc ( figs 116, 118 View FIGURES 115 – 119 ). Explanate margin of elytra mostly black, humeral angles, extreme lateral margin and apex yellow. Head, thorax, abdomen, legs and antennae yellow.

Pronotum elliptical ( figs 115, 116, 118 View FIGURES 115 – 119 ), with maximum width slightly in front of the middle, sides broadly rounded, no basal corners. Pronotal disc impunctate, shiny. Explanate margin broad, almost horizontal, smooth and shiny with well visible honeycomb structure.

Base of elytra much wider than base of pronotum ( figs 115, 116, 118 View FIGURES 115 – 119 ). Humeri moderately protruding anterad, subangulate, elytral margin beyond humeral angle very shallowly emarginate. Disc unevenly convex ( fig. 117 View FIGURES 115 – 119 ), with distinctly elevated postscutellar area and shallow postscutellar impressions. Punctation regular, very fine, on slope looks like fine pricks, on sides only slightly coarser than on top of disc, punctures in rows moderately dense, distance between punctures 2–4 times wider than puncture diameter. Punctures in marginal row twice to thrice coarser than in central rows. Intervals several times wider than rows, flat, smooth and shiny. Explanate margin moderately broad, moderately declivous, in the widest part approximately 4.5–5.0 times as wide as disc, its surface smooth and shiny, yellow parts with well visible honeycomb structure.

Clypeus narrow, approximately 1.2 times as wide as long, lateral grooves well marked, converging in regular triangle. Clypeal plate only slightly convex, smooth and shiny, with few small punctures. Length ratio of antennal segments: 100:47:56:68:62:56:62:56:62:62:126. Segment 3 approximately 1.2 times as long as segment 2 and approximately 0.8 times as long as segment 4.

Prosternal collar as long as length of third antennal segment, its sides not angulate. Prosternal process broad, distinctly expanded apically, area between coxae flat or with shallow impression and with few small setose punctures, shiny, expanded apex in the middle only slightly convex, its surface with irregular longitudinal wrinkles but shiny.

Claws with small basal tooth, last segment of tarsi with distally projecting flanks thus claws appear distinctly denatate.

Distribution. Republic of Congo (Brazzaville) and Democratic Republic of Congo ( Zaire) ( fig. 15 View FIGURE 15 ).

Remarks. Chiridopsis spadix   ( figs 115–118 View FIGURES 115 – 119 ) and Ch. castaneoplagiata   ( figs 46, 47 View FIGURES 43 – 49 ) are the only species with explanate margin of elytra mostly black and elytral disc black with large central reddish spot sometimes covering a significant part of the disc surface. Chiridopsis castaneoplagiata   differs in explanate margin of elytra almost completely black, only humeri and anterior half of elytral border are narrowly margined by yellow while in Ch. spadix   explanate margin of elytra is reddish to yellow in anterior corners, along lateral margin, and apically. They also differ in elytral convexity, Ch. spadix   has well marked elevation in postscutellar area while in Ch. castaneoplagiata   elytral disc is in profile regularly convex ( figs 47 View FIGURES 43 – 49 , 117 View FIGURES 115 – 119 ).

Type examined. Syntype: [ REPUBLIC OF CONGO] Brazzaville, Boutarel (MM).  

Other specimens examined. DEMOCRATIC REPUBLIC OF CONGO ( ZAIRE): Buta, 1911, 1, de Calonne ( MRAC)   ; Lokandu, 1937, 5, Lt Marée (MRAC, DBET); Yangambi (Stan.), X –XII 1959, 1, J. Dubois ( DBET)   .

REPUBLIC OF CONGO: R.P. Congo, V 1980, 1 ( DBET).  


Mus�e Royal de l�Afrique Centrale














Chiridopsis spadix ( Spaeth, 1917 )

Świ, Jolanta 2017

Chiridopsis spadix: Spaeth, 1924 : 351

Borowiec 1999: 304
Spaeth 1924: 351

Chirida spadix

Spaeth 1917: 441