Five new species of Alisotrichia Flint, 1964 (Trichoptera: Hydroptilidae: Leucotrichiinae) from Northeastern Brazil Author Alves, André Almeida Universidade Federal do Rio de Janeiro (UFRJ), Museu Nacional, Programa de Pós-graduação em Zoologia, Rio de Janeiro, RJ, Brasil. & Universidade Federal do Rio de Janeiro (UFRJ), Centro de Ciências da Saúde, Instituto de Biologia, Departamento de Zoologia, & Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Instituto de Biociências, Departamento de Zoologia, Laboratório de andrerjpe@gmail.com Author Takiya, Daniela Maeda Universidade Federal do Rio de Janeiro (UFRJ), Centro de Ciências da Saúde, Instituto de Biologia, Departamento de Zoologia, Author Santos, Allan Paulo Moreira Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Instituto de Biociências, Departamento de Zoologia, Laboratório de text Revista Brasileira de Entomologia 2023 e 20230073 2023-12-15 67 1 11 http://dx.doi.org/10.1590/1806-9665-rbent-2023-0073 journal article 10.1590/1806-9665-RBENT-2023-0073 1806-9665 13197528 Alisotrichia nordestina sp. nov. urn:lsid:zoobank.org:act: B7058880-31E1-4334-A81E-DCBDC87EC505 ( Figs. 10 , 11 A-11E) Alisotrichia sp. 3 in Takiya et al. (2016) Description. Adult male. Length 1.40–1.75 mm (mean = 1.52 mm , SD = 0.07, n = 29). General color, in ethanol, light brown ( Fig. 10 ). Antennae 18-articuled; scape enlarged, subtriangular in anterior view ( Fig. 11E ); pedicel slightly globose, about the same length as that of the next two articles combined ( Fig. 11E ); flagellomeres short, covered by scale-like setae, apical article tapering ( Fig. 11E ). Ocelli 2. Maxillary palpi 5-articulated, 4th and 5th palpomeres thin, 5th palpomere about 1.5x longer than 4th. Labial palpi 3-articulated. Mesoscutellum with transverse suture. Metascutellum subtriangular. Tibial spurs formula 0,2,4, each pair of meso- and metatibial spurs with one spur about twice as long as the other. Fore- and hind wings with long dark brown setae, forewings with white setae forming spots ( Fig. 10 ). Abdominal segment VII with ventromesal process, bifurcate in lateral view, with dorsal branch slightly longer than ventral ( Fig. 11C ). Figure 8 Alisotrichia dilatata sp. nov. Paratype male (in alcohol), dorsal habitus. Scale bar = 0.5 mm. Male genitalia. Segment VIII with a pair of dorsolateral processes, directed posterad, each bearing an elongate, spine-like seta, extending beyond segment apex ( Figs. 11A, 11C ); with a subapical constriction, posterior margin with a pair of lateral acute sclerotized processes, directed posterad, in lateral view ( Fig.11C ); in ventral view, mesally with a pair of short and rounded lobes, separated by a shallow incision, lateral acute sclerotized processes slightly curved inwardly ( Fig. 11B ). Segment IX fused with segment X, reduced ventrally; with a pair of lateral elongate processes, curved downwards in lateral view; slightly curved inwards in dorsal view ( Figs. 11A, 11C ); anterolateral margin with a pair of slender apodemes reaching segment VII internally ( Fig.11 A-11C). Segment X long, membranous, almost rectangular in dorsal view ( Fig.11A ); dorsally with a pair of slender sclerites, with rounded and divergent apices ( Fig.11A ). Subgenital plate, in ventral view, short, not extending beyond half length of segment VIII; anterior portion projecting into a pair of rods; posterior portion trapezoidal ( Fig.11B ). Inferior appendages absent.Phallus tubular and short, constricted mesally; with a pair of apical capitate lobes, each one with internal margin concave, pointed projection at midlenght, and a rod-like projection at base ( Fig.11D ); apical portion covered by a thin, quadrangular membrane ( Fig.11D ); ejaculatory duct projecting between apical lobes ( Fig. 11D ). Taxonomic notes. This new species has a pair of dorsolateral processes on segment VIII,thus, is placed in the orophila group. Alisotrichia nordestina sp. nov. is very distinctive and somewhat resembles A. macae Santos, 2011 , A. mathisi Harris & Flint, 2002 , and A. paxilla Harris & Flint, 2002 , particularly because of the pointed, sclerotized posterolateral processes on segment VIII ( Fig. 11 A-11C). However, the new species is readily distinguished from these other species by the shallow mesal incision on posterior margin of segment VIII in ventral view, forming a pair of short and rounded lobes ( Fig.11B ); and by the shape of the phallus apex, with a pair of capitate lobes, each one with the internal margin concave, a pointed projection, and an additional rod-like projection at base ( Fig.11D ). Figure 9 Alisotrichia dilatata sp. nov. Male genitalia (holotype): A–D. (A) dorsal view; (B) ventral view; (C) lateral view; (D) phallus, dorsal view. (E) antenna, frontal view. Ab - breviation: lat. proc. = lateral process of segment IX.Scale bar = 0.1 mm. Etymology: “Nordestina”, a Portuguese adjective, is the gentilic for those born in Northeast Region of Brazil and refers to the localities where specimens of this species have been collected. Distribution: Brazil ( Ceará , Sergipe ). Caatinga and Atlantic Forest biomes. Material examined. Holotype male: BRAZIL : Sergipe , Itabaiana , Parque Nacional da Serra de Itabaiana , Riacho Água Fria , 10°45’17”S , 37°20’32.4”W , 196 m , 17-19.vi.2014 , Malaise trap , D.M. Takiya , A.P.M. Santos , W.R.M. Souza , A.C. Domahovski ( DZRJ ). Paratypes : same data as holotype, 7 males ( DZRJ ) , 6 males ( UFBA ) , 6 males ( INPA ) , 6 males ( MNRJ ) ; same data, but Riacho dos Negros , 10°44’50.8”S , 37°20’24”S , 202 m , 17.vi.2014 , Pennsylvania trap, D.M. Takiya , A.P.M. Santos , W.R.M. Souza , & A.C. Domahovski leg., 2 males ( DZRJ ) ; Ceará , Ubajara , Parque Nacional de Ubajara , Rio das Minas na altura do teleférico, 03°49’58”S , 40°53’53”W , 420 m , 20-27.iv.2015 , Malaise trap , J.A. Rafael et al. leg., 1 male ( DZRJ ) .