Three new species of Stactobiinae (Trichoptera: Hydroptilidae), new distributional records, and an updated checklist for Brazil Cavalcante-Silva, Amanda Santos, Allan Paulo Moreira Calor, Adolfo Ricardo Zootaxa 2025 2025-07-02 5659 1 87 103 Cavalcante-Silva & Santos & Calor 2025 [151,421,1626,1653] Insecta Hydroptilidae Flintiella Animalia Trichoptera 1 88 Arthropoda species angrisanoae sp. nov.  ( Figures 2A–2H)   Material examined.   Holotype male. Brazil: Minas Gerais: São Roque de Minas, Serra da Canastra National Park, Fazenda Velha, Ribeirão das Posses, 20°14’49”S, 46°38’34”W, el.  990 m,  01.iv.2014, J.L. Nessimian, A.L.H. Oliveira, L.L. Dumas, S.P. Gomes( DZRJ).   Paratypes.Same national park except Cachoeira do Rolinho, Ribeirão da Mata, Pennsylvania trap, 20°10’34”S, 46°33’35”W, el.  1100 m,  16.xi.2014, J.L. Nessimian, A.L.H. Oliveira, I.C. Rocha, P.M. Souto, leg.,  2 males( DZRJ), same national park except São João Batista da Canastra, Cachoeira Jota, Rio Araguari, 20°08’50”S, 46°40’13”W, el.  1141 m,  16.xi.2014, 1 male( DZRJ).   Description. Adult male.Length 1.4–1.6 mm(mean 1.5 mm, n = 4), holotype 1.6 mm(from tip of head to wing apices). Forewing length 1.1–1.3 mm(mean 1.2, n = 4), holotype 1.3 mm. General color, in alcohol, pale yellow. Antennae 18–segmented, unmodified; each with scapus cylindrical, pedicel cylindrical, apical flagellomere short and with small projection ( Fig. 2A). Ocelli absent. Posterior setal warts of head triangular. Maxillary palps 5- segmented; labial palps 3-segmented. Legs covered by golden setae, tibial spur formula 0–2–3. Wings unmodified, without flaky patches; fore- and hind wings with main veins present ( Figs 2B, 2C). Forewings, in alcohol, uniformly brown, with light brown setae; each with Sc incomplete, ending just after middle of wing length; apical forks 1, 2, and 3 present ( Fig. 2B). Hind wings narrow, more acute than forewings; each with Sc incomplete; apical forks 1 and 2 present ( Fig. 2C). Mesoscutellum with transverse suture. Metascutellum rectangular, short and wide. Sternite VII without apicomesal process ( Figs 2E, 2F).   FIGURE 1.Distribution map of Stactobiinaespecies in the Brazilian states and biomes.   FIGURE 2.  Flintiella angrisanoae  sp. nov., male: 2A, apical flagellomeres, frontal; 2B, right forewing, dorsal; 2C, right hind wing, dorsal; 2D–2H, genitalia: 2D, dorsal; 2E, ventral; 2F, left lateral; 2G, phallus, dorsal; 2H, phallus, left lateral. Scale = 0.1 mm.  Male genitalia. Segment VIII annular. Segment IX reduced ventrally; anterior margin concave with elongate anterolateral apodemes extending into segment VI in dorsal and ventral views ( Figs 2D, 2E); ventrally above bases of inferior appendages with posteromesal margin deeply U–shaped in ventral view ( Fig. 2E); posterior process with rounded apex in lateral view ( Fig. 2F). Tergum X membranous with deep V–shaped incision in dorsal view ( Fig. 2D); lobate in lateral view ( Fig. 2F). Inferior appendages long, slightly sinuous, each with projecting and round apex in ventral view ( Fig. 2E); triangular, slightly upturned and pointed posterodorsal in lateral view ( Fig. 2F). Subgenital plate complex, divided into dorsal and ventral processes; ventral process plate-like, incised apically, forming two round lobes apically in ventral view ( Fig. 2E); dorsal process more sclerotized, inflated mesally, narrow apically and basally ( Fig. 2E); both processes curved downward in lateral view ( Fig. 2F). Phallus tubular ( Figs 2G, 2H), apex divided into two asymmetrical lobes both curved to left and dorsal lobe slightly more curved in dorsal view ( Fig. 2G); in lateral view apical lobes curved upward ( Fig. 2H); ejaculatory duct protruding subapically ( Figs 2G, 2H).   Diagnosis.The male genitalia of  Flintiella angrisanoae  sp. nov.are similar to those of  F. panamensis Harris, Flint & Holzenthal 2002b,  F. tamaulipasa Harris, Flint & Holzenthal 2002b, and  F. yanamona Harris, Flint & Holzenthal 2002b, mainly due to the ventral posteromesal U–shaped notch in segment IX and the deeply incised phallic apex. However, the new species can be distinguished from those by sternite VII lacking an apicomesal process ( Figs 2D, 2E), the inferior appendages being longer and slightly sinuous ( Fig. 2D), the subgenital plate being complex, divided into dorsal and ventral processes ( Figs 2D, 2E), and the apex of the phallus being divided into two asymmetrical lobes, curved to the left in dorsal and ventral views, with an ejaculatory duct protruding subapically ( Figs 2F, 2G).   Etymology.This species is named in honor of Dr Elisa B. Angrisano, for her outstanding contributions to the genus  Flintiellaand to the study of Neotropical Trichoptera.   Distribution. Brazil(MG). 5208879374 2014-04-01 DZRJ J. L. Nessimian & A. L. H. Oliveira & L. L. Dumas & S. P. Gomes Brazil Sao Roque de Minas 990 -20.246944 Serra da Canastra National Park 21 -46.64278 Serra da Canastra National Park 1 88 1 Minas Gerais holotype 5208879321 2014-11-16 Pennsylvania trap DZRJ J. L. Nessimian & A. L. H. Oliveira & I. C. Rocha & P. M. Souto Brazil Ribeirao da Mata 1100 -20.176111 Cachoeira do Rolinho 21 -46.559723 Cachoeira do Rolinho 1 88 1 Minas Gerais paratype 5208879350 2014-11-16 Pennsylvania trap DZRJ J. L. Nessimian & A. L. H. Oliveira & I. C. Rocha & P. M. Souto Brazil Sao Joao Batista da Canastra 1141 -20.147223 Cachoeira Jota 21 -46.67028 Cachoeira Jota 1 88 3 3 Minas Gerais paratype