Campsurus lacia, De Lima & Cruz & Hamada, 2025

Campsurus lacia sp. nov. De Lima, Cruz & Hamada

( Figures 5A–I View FIGURE 5 ; 6A–C View FIGURE 6 ; 7A–E View FIGURE 7 )

Type Material. Holotype: male imago ( INPA) from Brazil; Rondônia; Machadinho D’oeste, Machado River, 2 November waterfall, S08°54’27.77”, W062°10’36.53”, 08.vii.2018, P. V. Cruz, G. Desidério, N. Hamada, J. O. da Silva, Andrew Short, cols GoogleMaps . Paratypes: 20 male imagos, one female imago, (10 at INPA, 10 at ENT-UNIR), same data as holotype GoogleMaps . Additional material. One male imago from Brazil, Maranhão, Caxias, fazenda Pé de Serra, Rio Itapecuru , S05°07’28.5”, W043°33’02.3”, 06.iv.14, S. Nascimento col.; GoogleMaps 03 male imagoes ( ENT-UNIR), from Brazil, Piauí, Campo Maior , São Gonçalo do Gurgueia , Comunidade do Arara , rio Gurgueia , S10°2’41.94”, W45°19’33.12”, 24.vi.2024, L. R. C. Lima, S. Nascimento, S. E. C. Vitor, cols.; GoogleMaps 03 male imagoes ( ENT-UNIR), same data except date 08–09.viii.24 and cols. L. R. C. Lima, I. Gonçalves, C. R. T. de Lima GoogleMaps .

Diagnosis. Male imago: 1) sternum IX with posterior margin straight ( Figs. 5C and G View FIGURE 5 ); 2) pedestal touching basally; inner projection subtriangular, short and robust, wider than long; outer projection reduced, tapering towards the apex ( Figs. 5C and D View FIGURE 5 , 6A View FIGURE 6 ); 3) base of each penis subtrapezoid ( Figs. 5C, D and F View FIGURE 5 , 6A and B View FIGURE 6 ); 4) main lobe of penis sclerotized, tapering towards the apex, longer than secondary lobe, slightly curved ventrally ( Figs. 5C, E and G View FIGURE 5 , 6B View FIGURE 6 ); 5) secondary lobe membranous, positioned in front of the main lobe, straight, rounded apex with sparse setae ( Figs. 5C–E and G View FIGURE 5 , 6A and B View FIGURE 6 ). Female imago: 6) sternum VIII with a pair of elongate, fused, apically rounded socket ( Figs. 7A–E View FIGURE 7 ).

Description. Male imago. Length (n=10, mm): body, 9.8–10.1; fore wing, 9.6–9.8; hind wing, 4.9–5.5; cerci, 22.1–23.1 (the additional material of Piauí were used for measurements and description for wings. All wings of the type material are broken). General coloration yellowish brown ( Fig. 5A View FIGURE 5 ). Head yellowish, completely shaded with black dorsally, shaded with gray ventrally; antennae shaded with gray ( Fig. 5A View FIGURE 5 ). Thorax. Pronotum whitish translucent, slightly shaded with gray; meso and metanotum yellowish, sutures blackish, parapsidal suture and area between posteroscutal protuberances slightly shaded with black; prosternum whitish, slightly shaded with gray; meso and metastenum yellowish; mesofurcastenum slightly shaded with gray, mesofurcasternum plate yellowish, with inner margin parallel ( Figs. 5A and B View FIGURE 5 ). Legs. Foreleg, middle and hind legs shaded with gray. Wings. Fore wing with membrane hyaline; veins C, Sc and R light brown in the basal 1/3; other veins whitish; cross veins whitish; R whitish distally; IMP1 connected directly to MP; ICuA1 connected directly to ICuA2. Hind wing with whitish veins. Abdomen. Whitish translucent, slightly shaded with gray on terga III–VII; VIII–X darker ( Fig. 5A View FIGURE 5 ). Abdominal sterna translucent, with yellowish sternum IX–X, slightly shaded with black ( Fig. 5B View FIGURE 5 ). Genitalia. Sternum IX with posterior margin almost straight ( Fig. 5C View FIGURE 5 , 6A and B View FIGURE 6 ); pedestal touching basally; inner projection subtriangular, short and robust, wider than long, with rounded apex; outer projection reduced, tapering towards the apex ( Fig. 5D View FIGURE 5 , 6A View FIGURE 6 ); forceps whitish; base of each penis subtrapezoid; main lobe of penis sclerotized, slightly curved ventrally, tapering towards the apex; secondary lobe membranous, positioned in front of the main lobe, straight, shorter than main lobe, rounded apex with setae sparse ( Figs. 5C–F View FIGURE 5 , 6A and B View FIGURE 6 ). Subcircular paraproct, shortened and not protruding ( Figs. 5H–I View FIGURE 5 ). Caudal filaments translucent whitish.

Female imago ( Figs. 7A–E View FIGURE 7 ). Length (n=1, mm): body, 10.1; fore wing, 11.2; hind wing, 5.6; cerci, 3.8. Wings membranes hyaline, with whitish veins. Color pattern similar to male, except for fore wing with C, Sc and R veins and cross veins light brown in the basal 2/3; terga I to II slightly shaded gray, III–VII with well-defined dark posterior margin, VIII–IX shaded with gray ( Fig. 7A View FIGURE 7 ). Sternum VIII with a pair of elongate, fused, apically rounded socket ( Figs. 7C and D View FIGURE 7 ). Caudal filaments translucent whitish.

Etymology. Tribute to Laboratório de Citotaxonomia e Insetos Aquáticos—LACIA (INPA), coordinated by Dr. Neusa Hamada, for promoting and fostering aquatic science expeditions throughout the Amazon and Brazil. Name in apposition.

Distribution. Rondônia, Piauí, Maranhão — Brazil.