Three new species of Bruggmannia Tavares, 1906 (Diptera: Cecidomyiidae) from Brazil and description of male and larva of B. monteiroi Maia & Couri, 1993 Author Maia, Valéria Cid Universidade Federal do Rio de Janeiro, Museu Nacional, Departamento de Entomologia, Rio de Janeiro, RJ, Brasil. Author Jr, Milton de Souza Mendonça Universidade Federal do Rio Grande do Sul, Instituto de Biociências, Departamento de Ecologia, Laboratório de Ecologia de Author Espinheira, Ivana Hortélio Leão Universidade Federal do Rio de Janeiro, Museu Nacional, Departamento de Entomologia, Rio de Janeiro, RJ, Brasil. text Revista Brasileira de Entomologia 2023 e 20220097 2023-05-01 67 1 1 19 http://dx.doi.org/10.1590/1806-9665-rbent-2022-0097 journal article 10.1590/1806-9665-RBENT-2022-0097 1806-9665 Bruggmannia gaucha, Maia & Mendonça , sp. n. urn:lsid:zoobank.org:act: A7C706DC-FA54-4D35-AFAD-31E026904EFC Description . Male.2.0- 2.3 mm long (n=3). Head: eye facets circular, closely appressed; antennae: scape trapezoidal, setose, pedicel globoid, setose, flagellomeres cylindrical, node microtrichose and neck almost entirely microtrichose, flagellomere node 3.6 times the length of neck (n=3); 1 st and 2 nd flagellomeres connate; circumfila wavy ( Fig. 5a ); last three flagellomeres similar in length ( Fig. 5b ); frons barely visible in the slides; mouth parts: labrum long-attenuate; hypopharynx of the same shape of labrum, with long anteriorly directed lateral setulae; labella elongate-convex, with lateral and two mesal setae each; palpus: 1 st segment globoid, 2 nd and 3th segments claviform, 2 nd segment 1.5 times as long as 1 st segment, 3 nd segment 1.5 times as long as 2 nd segment, all segments with setae and scales. Thorax: scutum with two dorsocentral rows of setae with scales intermixed, setae more abundant anteriorly and two rows of lateral setae, with scales intermixed; scutellum with scattered setae; anepimeron with a longitudinal row of setae and some scales; other pleura bare; wing ( Fig. 5c ) length (from arculus to apex): 2.10–2.20 mm (n=3); tarsal claws bent beyond midlength, empodium reaching bent in claws ( Fig. 5d ). Abdomen ( Fig. 5e ): 1 st –7 h tergites sclerotized, rectangular with posterior row of setae, few lateral setae, scales scattered, no basal pair of trichoid sensilla; 8 th tergite not visible; 2 nd –8 th sternites rectangular with posterior row of setae, numerous setae at midlength, lateral setae present, scales scattered, and a basal pair of trichoid sensilla. Terminalia ( Fig. 5f ): gonocoxite hemispherical, setose, setae more abundant at the apex, microtrichose, 2.0-2.2 times the length of gonostylus; gonostylus squarish with a row of setae just below teeth, scattered setae, microtrichose; cerci separate, riniform, setose, microtrichose; hypoproct bilobed, setose, microtrichose; aedeagus glossiform, gonocoxal lobes very short. Figure 2 Bruggmannia capixaba , sp. n. , male: a) Head, frontal view, b) 3 rd flagellomere, c) Wing, d) 5 th- 8 th abdominal segments, lateral view. Female. 3.2-3.5 mm long (n=3). Head as in male ( Fig. 6a ), circumfila less sinuous than in male, with two connected rings ( Fig. 6b ); frons with 30 setae (n=2); labella elongate-convex, 2.0-3.0 times as long as wide (n=3); palpus: 2 nd segment 2.0 times as long as 1 st segment, 2 nd and 3 rd segments subequal in length; wing length (from arculus to apex): 2.35–2.50 mm (n=3). Abdomen ( Figs.6 c-7a): 1 st –7 th tergites as in male; 8 th tergite sclerotized, laterally notched, with distal row of setae, scales scattered, no basal pair of trichoid sensilla; 2 nd –6 th sternites as in male; 7 th sternite 1.72-1.86 times as long as 6 th sternite, with posterior row of setae, numerous setae at midlength, lateral setae present, scales scattered, and a basal pair of trichoid sensilla; 8 th sternite not sclerotized; ovipositor ( Fig. 7b ) soft, short, 1.72 times the length of 7 th sternite (n=1); cerci tiny with some short setae. Pupa ( Fig. 8a ). 2.1-3.1 mm long (n=2). Integument brownish. Head ( Fig. 8b ): pair of antennal papillae present, antennal horn conical, short, with outer and inner margins smooth; apical seta 0.7 times the length of prothoracic spiracle; upper facial horns semicircular; lower facial horns conical; two pairs of lower facial papillae: one pair with seta, the other bare; two lateral facial papillae near base of each palpus, one with setae, the other bare; upper cephalic margin thickened laterally, face with lateral projection, head integument wrinkled just below antennal bases and around upper facial horns, except below them. Thorax: prothoracic spiracle setiform, curved, short, 0.08-0.09 mm long, 1.2-1.3 times as long as flagellomeres width, prothorax with three pairs of dorsal papillae and two pairs of lateral papillae, no lateral projection just below prothoracic spiracles. Abdomen: spiracles not elongated, 2 nd –8 th segments with dorsal spines near anterior margin, arranged only centrally, spines in the 2 nd segment rudimentary, shorter than those of 3 rd- 8 th segments ( Fig. 8c ), integument ventrally sculptured. Last segment with two rounded terminal projections in both sexes, projections close together and longer in male pupa, projections far apart and shorter in female pupa ( Figs. 8d, e ). Figure 3 Bruggmannia capixaba , sp.n. : a) Male terminalia, dorsal view, b) Female 3 rd flagellomere,c) Female,7 th – 8 th abdominal segments,ventral view,d) Ovipositor,ventral view. Larva ( Fig. 9a ). 3.20 mm long (n=3), body elongate, cylindrical, tapered towards posterior end; integument rough. Prothoracic sternal spatula absent, sternal papillae setose; three setose lateral papillae on each side, four dorsal papillae setose from 1 st to 7 th abdominal segments. Terminal segment with 1/5 of total length of larva, integument rough dorsally, elongate and strongly tapered towards apex, a group of setulae subasally ( Fig. 9b ). Papillae not visible. Anus rounded. Gall ( Fig. 9c ): on stem, fusiform to ovoid, reddish, glabrous, one to multichambered on Guapira opposita. Etymology. The name “gaucha ” means native of the state of Rio Grande do Sul . Material Examined. Holotype male. Brazil , Rio Grande do Sul , Porto Alegre (Morro Santana), 22.X.2013 , Rodrigues A. col, MNRJ . Paratypes : same locality, date and collector as holotype , 2 males , 3 females , 2 pupal exuviae, 2 pupae , 4 larvae , MNRJ . Figure 4 Bruggmannia capixaba , sp.n. , pupa:a) General aspect,dorsal view,b) Head and prothoracic spiracles,ventral view, c) 7 th abdominal segment, dorsal view,d) 7 th abdominal segment, ventral view, e) Terminal segment, ventral view, f) Gall, general aspect (from Bregonci et al., 2010 , original photo without scale). Distribution: Rio Grande do Sul (Porto Alegre, Viamão, Canela, Maquiné e Torres). Comments. This species is unique in having the following set of characters: 1) Adults: glossiform aedeagus, ovipositor 1.72 times the length of 7 th sternite; 2) Pupa: no lateral projection below prothoracic spiracles; setiform, curved and short prothoracic spiracles; short and not sparse abdominal spines; and 3) Larva: terminal segment with 1/5 of total length of body. The comparison between Bruggmannia gaucha and other congeneric species on Guapira was showed in the comments of B. capixaba .