Chnoodes tristis Krüger & Almeida, 2018

Krüger, Thaysa C., Churata, Julissa, Castro-Guedes, Camila F. & Almeida, Lúcia M., 2018, New species of Chnoodes Chevrolat (Coleoptera: Coccinellidae) from French Guiana, Zootaxa 4399 (3), pp. 386-398 : 394-395

Chnoodes tristis Krüger & Almeida sp. nov.

( Fig. 5 )

Diagnosis. Chnoodes tristis sp. nov. resembles C. melanus sp. nov. in the black color of the integument, but differs in having the pronotum with two lateral orange spots, in the shape and size of the male genitalia, and in the shape of the spermatheca.

Description. Male. Length 3.0– 3.22 mm, width 2.54–2.76 mm. Body oval, with short fine yellowish pubescence. Integument of pronotum, scutellar shield and elytra black; pronotum with two lateral orange spots, anterior border translucent; elytra apex with very narrow orange to castaneous margin ( Figs. 5A, D ). Head, antennae and mouthparts orangeish ( Fig. 5C ). Meso- and metaventrite black. Epipleuron brownish, with slight excavations to receive femora. Legs with femora, tibiae and tarsi orangeish ( Fig. 5B ).

Genitalia with tegmen, penis guide, phallobase and parameres symmetrical. Penis guide shorter than parameres, slightly tapered at apex, rouded ( Fig. 5E ). Parameres articulated with phallobase, distant from each other, 2x length of penis guide, slightly widened at apex, with short bristles at base and long bristles on median part of parameres ( Fig. 5F ). Penis sclerotized, J-shaped, apex thin and slightly curled, penis capsule long, T-shaped ( Fig. 4G ).

Female. Length 2.90–3.05 mm, width 2.30–2.62 mm. Similar to male. Genitalia with coxites longer, 2.5x longer than wide, subtriangular; stylus with short bristles ( Fig. 5H ). Spermatheca short, C-shaped, strongly curved near apex, ramus and nodulus distinct; apex narrowing, slightly mammiliform ( Fig. 5I ).

Etymology. Latin, tristis = sad; alluding to the general coloration.

Geographical Distribution. French Guiana (Kourou, Iracoubo, Roura) ( Fig. 7 ).

Type material. FRENCH GUIANA: Commune de Kourou: “Guyane Française, Savane des/Pères, Commune de Kourou,/5°06’33,40”N 52°38’12”W,/ 27.VII.2014, malaise SLAM,/SEAG col.”, “♂”, “MNHN”, “HOLOTYPE/ Chnoodes tristis [red label]. The following specimens are designated as PARATYPE Chnoodes tristis [yellow label]: “Guyane Française, Savane des/Pères, Commune de Kourou,/5°06’33,40”N 52°38’12”W,/ 27.VII.2014, malaise SLAM,/SEAG col.”, [DZUP 285825 ♂, MNHN ♀]. Commune de Iracoubo: “Guyane Française, Zone/ Naturelle de Trou-Poissons,/ 07.V.2014, malaise SLAM,/SEAG col.”, [DZUP 185699 ♂, 188102 ♂, 188226 ♂, 188133 ♂, 187427 ♀, 185911 ♀, MNHN ♂]; “Guyane Française, Zone/Naturelle de Trou-Poissons,/ 07.V.2014, malaise,/SEAG col.”, [DZUP 228977 ♂, 228959 ♂, 185996 ♂, MNHN ♀]; “Guyane Française, Zone/Naturelle de Trou-Poissons,/ 07.V.2014, Gemlight,/SEAG col.”, [DZUP 192262 ♂]. Commune de Roura: “Guyane française,/ Montagne des Chevaux,/RN2 PK22, Commune/de Roura, 04.XII.2011,/malaise SLAM,/Stéphane Brûlé leg.”, [MNHN ♂]; “French Guyane, Cayenne,/Roura, Montagne des/Chevaux, 28.XI.2010, vitre,/S. Brulé leg.”, [DZUP 145739 ♂].

Figures

FIGURE 4. Chnoodes cerasus Krüger & Almeida sp. nov. A–D. Habitus; A dorsal; B. ventral; C. frontal; D. lateral view. E– G. Male genitalia: E. tegmen, ventral; F. tegmen, lateral; G. penis, lateral view. H–I. Female genitalia; H. coxites; I. spermatheca.

FIGURE 5. Chnoodes tristis Krüger & Almeida sp. nov. A–D. Habitus; A. dorsal; B. ventral; C. frontal; D. lateral view.E–G. Male genitalia: E. tegmen, ventral;F.tegmen, lateral; G. penis, lateral view. H–I. Female genitalia; H. coxites; I. spermatheca.

FIGURE 7. Map showing the known geographical distribution of the species of Chnoodes Chevrolat, 1849, from French Guiana.