Bruggmannia marambaiensis Maia & Espinheira, 2023

Maia, Valéria Cid, Jr, Milton de Souza Mendonça & Espinheira, Ivana Hortélio Leão, 2023, Three new species of Bruggmannia Tavares, 1906 (Diptera: Cecidomyiidae) from Brazil and description of male and larva of B. monteiroi Maia & Couri, 1993, Revista Brasileira de Entomologia (e 20220097) 67 (1), pp. 1-19 : 6-9

Bruggmannia marambaiensis Maia & Espinheira , sp. n.

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Description. Male. 2.4-2.8 mm long (n=4). Head ( Fig. 10a ): eye facets circular, closely appressed; antennae: scape trapezoidal, setose, pedicel globoid, setose, flagellomeres cylindrical, node microtrichose and neck bare, flagellomere node 5 times the length of neck (n=3); 1 st and 2 nd flagellomeres connate, circumfila wavy ( Fig. 10b ); frons with 25-37 setae (n=3); mouth parts: labrum long-attenuate; hypopharynx of the same shape of labrum, with long anteriorly directed lateral setulae; labella elongate-convex, with lateral and three mesal setae each; palpus: 1 st segment globoid, shorter than 2 nd segment, 2 nd and 3th segments claviform, 2 nd segment 1.1-1.5 times as long as 1 st segment, 3 rd segment 1.3-1.5 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 setae subdistally; anepimeron with some setae and scales; other pleura bare; wing ( Fig. 10c ) length (from arculus to apex): 1.80–1.90 mm (n=2); tarsal claws bent beyond midlength, empodium rudimentary ( Fig. 10d ). Abdomen ( Fig. 10e ): 1 st –6 th tergites sclerotized, rectangular with posterior row of setae, no lateral setae, scales scattered, no basal pair of trichoid sensilla, 7 th tergite sclerotized, rectangular with posterior row of setae, few lateral setae, scales scattered, no basal pair of trichoid sensilla; 8 th tergite sclerotized, with a mesal reentrance at distal margin, bare; 2 nd –6 th sternites rectangular with posterior row of setae, numerous setae at midlength, lateral setae present, scales scattered, and a basal pair of trichoid sensilla; 7 th sternite with a mesal reentrance at basal margin, posterior row of setae, numerous setae at midlength, lateral setae present, scales scattered, and a basal pair of trichoid sensilla,8 th sternite rectangular, with scattered setae, scales and a basal pair of trichoid sensilla. Terminalia ( Fig. 11a ): gonocoxite hemispherical, setose, setae more abundant at the apex, microtrichose, 2.0-2.5 times the length of gonostylus; gonostylus squarish with a row of setae just below teeth, scattered setae, microtrichose; cerci wide with lobes rounded, setose, microtrichose; hypoproct bilobed, lobes narrower than cercal lobes, microtrichose; aedeagus conical, gonocoxal lobes very short.

Female. 2.5-3.0 mm long (n=4). Circumfila less sinuous than in male, with two connected rings ( Fig.11b ); last three flagellomeres shorter than others ( Fig. 11c ); frons with 42 setae (n=1); labella elongate-convex; palpus: 2 nd segment 2 times as long as 1 st segment, 3 rd segment 1.3 as long as 2 nd segment; wing length (from arculus to apex): 1.95–2.20 mm (n=5). Abdomen ( Fig. 11d ): 1 st –7 th tergites as in male; 8 th not visible; 2 nd –6 th sternites as in male; 7 th sternite 2.0 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. 11e ) soft, short, subequal to 7 th sternite in lenght (n=1); cerci tiny with some short setae.

Pupa ( Fig. 12a ). 2.5-3.0 mm long (n=5). Integument brownish. Head ( Fig.12b ): a pair of antennal papillae present, antennal horn triangular, short, with outer and inner margins smooth; apical seta 0.5 times the length of prothoracic spiracle (n=5); upper facial horns triangular; lower facial horns absent; two pairs of lower facial papillae: one pair with seta, the other bare; a triplet of papillae (two with setae and one bare) near base of each palpus; 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, relatively short, 0.15 mm long, 2.0 times as long as flagellomeres width (n=5), 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 ( Fig.12c ), spines in the 2 nd segment rudimentary, shorter than those of 3 rd- 8 th segments, integument ventrally sculptured ( Fig.12d ). Last segment with two rounded terminal projections far apart in female pupa and absent in male pupa ( Figs. 13a, b ).

Larva. 2.8-3.5 mm long (n=5), body elongate, cylindrical, tapered towards posterior end ( Fig.13c ). 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 1/3-1/4 of total length of larva (n=5), elongate and strongly tapered towards apex; integument spiny dorsally, a group of setulae near basal margin. Papillae not visible. Anus rounded.

Gall: on leaves, globoid, brown, glabrous, and one-chambered on Guapira opposita.

( Fig. 13d ).

Etymology. The name “marambaiensis ” refers to the type-locality: Marambaia Island.

Material Examined. Holotype male. Brazil, Rio de Janeiro, Mangaratiba, Ilha da Marambaia , Praia do Sítio , 29.vii.2010, Rodrigues A. col, MNRJ . Paratypes: same locality, date and collector as holotype, 2 males , same locality and collector, 21.xi.2010, 2 males, 4 females, 6 pupal exuviae ), same locality and collector, 22.vi.2020, 1 female , same locality and collector, 25.vii.2010, 6 pupal exuviae , same locality and collector, 24.ii.2011, 6 larvae, MNRJ .

Distribution: Rio de Janeiro (Mangaratiba). Comments. This species is unique in having the following set of characters: 1) Adults: conical aedeagus; ovipositor and 7 th sternite subequal in length; 2) Pupa: no lateral projection below prothoracic spiracles; setiform, little curved and long prothoracic spiracles; long and sparse abdominal spines; and 3) Larva: terminal segment with 1/3-1/4 of total length of body. Bruggmannia marambaiensis has aedeagus conical. There is only one other congeneric species with conical aedeagus on Guapira , Bruggmannia elongata Maia & Couri, 1993 . Both species differ from each other mainly in the length of empodia (rudimentary inB. marambaiensis and reaching the midlength of tarsal claws in B. elongata ), shape of upper facial horns (conspicuously more pointed in the new species than those of B. elongata ), width of dorsal plate (narrower in B. marambaiensis than that of B. elongata ), and arrangement of abdominal dorsal spines (along the entire width of B. marambaiensis and only centrally in B. elongata ).

Figures

Figure 10 Bruggmannia marambaiensis, sp.n., male:a)Head,frontal view,b) 6thflagellomere,c) Wing,d) Tarsalclaw,foreleg,lateral view,e) 6th – 8th abdominal segments,lateral view.

Figure 11 Bruggmannia marambaiensis, sp. n., a) Male terminalia, dorsal view, b) Female 5th flagellomere, c) Female 9th –12th flagellomeres, d) Female 7th – 8th abdominal segments, lateral view, e) Ovipositor, lateral view.

Figure 12 Bruggmannia marambaiensis, sp. n., pupa: a) General aspect, lateral view, b) Head and prothoracic spiracle, ventral view, c) Last abdominal segments, dorsal view, d) 6th abdominal segment, ventral view.

Figure 13 Bruggmannia marambaiensis, sp.n.: a-b) Pupa,terminal segment,sexual dimorfism,ventral view, a) Male pupa, b) Female pupa,c) Larva,general aspect,d) Gall,general aspect (from Rodrigues et al., 2014, original photo without scale).