Bruggmannia chapadensis, Proença & Maia, 2018

Proença, Barbara & Maia, Valéria Cid, 2018, Bruggmannia chapadensis sp. nov. (Diptera: Cecidomyiidae), a new midge inducing galls on Guapira pernambucensis (Nyctaginaceae) from the Parque Nacional da Chapada dos Guimarães, Mato Grosso State, Brazil, Zoologia (e 13040) 35, pp. 1-6 : 2-5

Bruggmannia chapadensis sp. nov.

http://zoobank.org/ 935FF98B-E831-44DF-B186-FBF1E6D1DF4F

Diagnosis. Adult: Palpus three segmented, first and second segments cylindrical, third claviform; flagellomeres cylindrical and slightly constrict near the base. Tarsal claws bend at distal 1/3; empodia well developed, setose, not reaching the bend in claws. Male terminalia: cerci rounded; hipoproct shorter than cerci; aedeagus with globose apex; gonostylus semicircular. Ovipositor protrusible about, 1.4 times longer than sternite 7, tapering to the apex. Pupa: antennal bases enlarged, conical, pointed apically and six times shorter than the basal antennal width; upper facial horns semicircular; prothoracic spiracle short 1.5 times longer than the antennal width; abdominal segments 2–8 with one row of dorsal spines near to the anterior portion of the segment. Larva: terminal segment elongate, with 0.30 mm length and four terminal papillae with seta.

Description. Adult.Body length: 1.8 mm in male (n = 1) and 3.2–3.3 mm in female (n = 3). Head ( Fig. 2): Frontoclypeus with 5–8 setae (n = 4); labrum long-attenuate with two setae (n = 4); hypopharynx longer than labrum and apically setulose; labellae with a sharp apex and four pairs of setae (n = 3); palpus with three setose crescent segments: segment one cylindrical, shorter than the other two, the second cylindrical and the third claviform, longer than the previous. Eye facets circular, closely approximat- ed. Antenna with scape cylindrical, with scales and two pairs of setae each (n = 3), pedicel spheroid with scales and three pairs of setae each; male and female flagellomeres cylindrical, slightly constricted near base, necks bare. Flagellomeres 1 and 2 connate, except in the left antenna of a single male; circumfila sinuous in both sexes ( Figs 3, 4); female flagellomeres 9–12 progressively decreasing in size ( Fig. 5). Thorax ( Fig. 6): Wing length: 2.0 mm in males (n = 1); 2.2–2.3 mm in females (n = 3); R 5 joining C at wing apex, R S and S C absent, M 4 evanescent, Cu A forked and Cu A1 joining M 4 slightly after wing midlength. Anepimeron with two irregular rows of setae. Other pleura bare. Tarsal claws bent at distal 1/3, empodia well developed, setose, not reaching the bend in claws ( Fig. 7). Male abdomen ( Fig. 8): Tergites and sternites with scattered scales and anterior pair of trichoid sensilla. Tergites 1–7 rectangular, with posterior row of setae, mesal setae irregularly distributed towards midlenght, less numerous than those of sternites, with few lateral setae. Tergite 8 sclerotized, rectangular, with only anterior pair of trichoid sensilla. Sternites 1–7 rectangular, sclerotized, with posterior row of setae, lateral row of setae, and mesal setae distributed close to the anterior margin. Sternite 8 sclerotized, rectangular, with posterior row of setae and incomplete lateral row of setae. Male terminalia ( Fig. 9): gonocoxite robust, with irregularly distributed dorsal setae; gonostylus inserted at gonocoxites’ midlenght, short, semicircular, with strongly sclerotized marginal setae and apical row of setae; cercus with two completely separated lobes, each lobe oval, setose, with apical setae; hypoproct shorter than cercus, setose, with rough base, almost truncated apex, with a single pair of setae; aedeagus wide, glossiform; parameres very short and setose.Female abdomen ( Figs 10, 11): Tergites and sternites with scattered scales and anterior pair of trichoid sensilla. Tergites 1–7 rectangular, with posterior row of setae, mesal setae irregularly distributed, with few lateral setae. Tergite 8 sclerotized, with posterior row of setae, mesal setae and anterior pair of trichoid sensilla. Sternites 1–7 rectangular, with anterior pair of trichoid sensilla, posterior row of setae, lateral row of setae, and mesal setae irregularly distributed. Sternite 8 not sclerotized, covered with scales and with anterior pair of trichod sensilla. Ovipositor ( Fig.12): protrusible, tapering to apex, striated, about 1.4 times longer than sternite 7, with two groups of long setae and some short setae ventrally near the apex; cerci tiny, separate, each one with a short apical and setose margin; hypoproct cylindrical, setulose, with two apical setae.

Pupal exuvia ( Fig. 13): Body length: 3.30–3.50 mm (n = 3). Integument strongly pigmented. Cephalic region: integument ventrally rough underneath antennal sheath, and nearby the superior facial horns; dorsally rough along the frontal suture, with short spines in the midlenght. Antennal bases strongly sclerotized, enlarged, conical, pointed apically at apex. Cephalic seta 0.06 mm long (n = 6). Upper and lateral cephalic margin thickened. Superior frontal horns semicircular; two pairs of lower facial papillae, one setose and other asetose; two pairs of three lateral facial papillae: two setose and others asetose. Lower facial horns triangular. Thorax: prothoracic spiracle, short, sharp and bend, 0.08–0.10 mm long (n = 7), 0.8 times longer than the basal width of the scape. Antennal sheath ending near or at the posterior margin of abdominal segment 2, foreleg sheath reaching from the posterior margin of abdominal segment 3 to the basal 1/3 of segment 4; midleg sheath reaching the middle of abdominal segment 4; hindleg sheath ending from distal 1/3 to posterior margin of abdominal segment 4. Abdomen: Segments 2–8 with one anterior dorsal row of spines, restricted to the central portion of the segments (segments 5–8 with spines longer spines); and with short upper spines. Segments 1–7 with short spines and sculptures dorsally and ventrally; ventral surface with elliptic and smooth sculptures at the anterior portion of the segments, hexagonal sculptures laterally and short spines at the middle of the segment ( Fig. 14); dorsal surface with circular smooth areas rounded by spines laterally and short spines elsewhere ( Fig. 15). Terminal segment with two posterior processes, corniform and strongly sclerotized, in females: processes shorter and more separated from each other than in males.

Larva ( Figs 16, 17): Body: elongated, flattened dorsoventrally and tapered at both ends, length: 2.30–2.70 mm (n = 2). Color: white. Integument with horizontal striations at anterior and posterior margins of each segment. Thorax: Spatula and lateral papillae absent; one pair of setose sternal papillae; two pairs of setose dorsal papillae and one pair of setose pleural papillae Abdomen: segments 1–7 with two pairs of setose dorsal papillae, segment 8 with one pair of setose dorsal papillae. Segments 1–8 with one pair of setose pleural papillae. Anus ventral and rounded. Terminal segment elongated, 0.30–0.35 mm long (n = 3), with four setose terminal papillae.

Material examined. Holotype: male, BRAZIL. Mato Grosso State: Parque Nacional da Chapada dos Guimarães, Caminho Véu da Noiva trail, 05/Sep./2011, Maia & Ascendino leg. ( MNRJ) . Paratypes 2 males, 10 females, 16 pupal exuviae and 2 larvae same data as the holotype, Maia & Ascendino leg. ( MNRJ) . Additional specimens (excluded from the type series). Rio de Janeiro, Restinga de Grumari , Brazil, Jun./2004, 9 pupal exuviae, Maia & Oliveira leg. ( MNRJ) .

Distribution. Currently known from Parque Nacional da Chapada dos Guimarães, Mato Grosso state ( Brazil) and Restinga de Grumari, Rio de Janeiro, State of Rio de Janeiro ( Brazil).

Etymology. The name chapadensis refers to the type-locality, Parque Nacional da Chapada dos Guimarães, where this species was collected.

Biological data. This species induces galls on leaves of Guapira pernambucensis (Casar.) Lundell ( Nyctaginaceae ). The galls are lenticular, light green, glabrous, and one-chambered ( Fig. 16).