Lopesia mataybae, Garcia & Urso-Guimarães, 2018

Garcia, Carolina de Almeida & Urso-Guimarães, Maria Virginia, 2018, Three new species of Lopesia Rübsaamen (Diptera: Cecidomyiidae) from Brazil, Florida Entomologist 101 (2), pp. 203-211 : 204

Lopesia mataybae sp. nov. Garcia & Urso-Guimarães ( Figs. 1–12 )

DESCRIPTION

Adult. Male – Light brown. Body: 1.3 mm long (male, n = 4); 1.6 mm long (female, n = 1). Head: Eyes black, holoptic, facets hexago- nal, closely adjacent. Occipital process present. Frontoclypeus with 6 long setae; labrum triangular with 4 pairs of setae; hypopharynx of the same shape as labrum; labella convex, each with 6 long lateral setae; palpi total length, 0.1 mm, palpi 4-segmented. Antennae: Scape and pedicel, 0.05 mm long and maximum length; scape broader distally; 12 binodal tricircumfilar flagellomeres; circumfila whorls regular in length in males ( Fig. 1 ) and 12 cylindrical flagellomeres with interconnected circumfila in females ( Fig. 2 ); apical process present ( Fig. 3 ); setulose necks in both sexes. Thorax:Scutum and scutellum dark brown.Scutum with 2 rows of dorsocentral setae, anepimeron with 10 setae, laterotergite with 2 trichoid sensilla, other sclerites bare. Legs: long, thick, first tarsomere without spur; tarsal claws simple, bend near midlength; empodia shorter than claws ( Fig. 4 ). Wings: 1.2 mm long and 0.5 mm wide in males (n = 4), and 1.3 mm long and 0.6 mm wide in female (n = 1) ( Fig. 5 ). Abdomen: Tergites 1–7 rectangular completely sclerotized, with a complete row of posterior setae in males and females; tergite 8 not sclerotized in males and only caudally in females. Trichoid sensilla absent in males and in the female. Sternites 1–7 weakly sclerotized in males and female with a complete row of posterior setae.Sternites 8–9 not sclerotized in female. Trichoid sensilla absent in sternites in males and female. Male terminalia ( Fig. 6 ): Gonocoxites narrow with discrete rounded mesobasal lobe; gonostylus narrow; longer than gonocoxite, sparsely covered with setae and microsetulae, group of 10 trichoid sensillae at the basal region; gonostylus teeth entire. Cerci setose and bilobed, outer lobe longer than the inner; hypoproct short, not deeply bilobed, with 1 strong setae at apex of each lobe, and as long as inner cercus lobe; parameres absent; aedeagus elongate, tapering gradually to the apex, and 1.5 longer than hypoproct. Apex of aedeagus with an irregular edge. Ovipositor ( Fig. 7 ): 0.1 mm long; protrusible, cerci ovoid, separate and setose, 2 setae longer than the others; hypoproct slightly bilobed and covered by setulae.

Pupa. Light brown. Body: 1.65 mm long (n = 3). Head: Antennal horns, 0.07 mm long, triangular, smooth edges, and sclerotized. Cephalic setae short (0.05 mm); upper frontal horn present and lower frontal horn absent, 2 pairs of lower facial papillae per side, 1 pair asetose and 1 setose, lateral facial papillae absent; edge of cephalic capsule thickening and sclerotized ( Fig. 8 ). Thorax: Prothoracic spiracle cylindrical, 0.06 mm long ( Fig. 9 ). Wing reaching third abdominal segment; all pairs of legs reaching sixth abdominal segment. Abdomen: Abdominal tergites 1–2 with tiny dorsal spines, tergites 3–8 with short and medium dorsal spines ( Fig. 10 ). Terminal segment 0.2 mm long; 0.3 mm wide. Integument rough.

Larva 3rd instar. Yellowish. Body: 0.7 mm long (n = 1). Anterior region not visible in the slide mounting. Terminal segment with 3 pairs of papillae of equal size, ventral anus in clef ( Fig. 11 ).

Type Material. HOLOTYPE male, Chapada dos Guimarães (Parque Nacional Chapada dos Guimarães), Mato Grosso, Brazil ( Cachoeira Véu da Noiva , 15.4361°S, 55.7897°W), reared from leaf galls of M. guianensis , 9 Jul 2012 by Maria Virginia Urso-Guimarães , emerged 11 Jul 2012 (Museu de Zoologia of the Universidade of São Paulo, São Paulo, Brazil) . PARATYPES, 3 males, 1 female, 2 pupal exuviae, 1 larva collected and reared with holotype ( Museu de Zoologia of the Universidade of São Paulo, São Paulo, Brazil) .

Etymology. The specific epithet refers to the generic name of the host plant.

Gall and biology. Cylindrical, green, unilocular, orange trichoma densely distributed on top of the gall on M. guianensis . Orange trichoma closes the top of gall forming an inner capsule that protects the immature ( Fig. 12 ). Pupation occurs in the gall.

Remarks. Running the key to segregation of Lopesia species ( Rodrigues & Maia 2010), we observed that the specimens studied do not belong to any described species, although L. mataybae sp. nov. shares setulose flagellomere necks (couplet 1), narrow gonocoxites (couplet 2’), gynecoid male flagellomere (couplet 7), and wing with Rs joining R 1 afer its midlength (couplet 8) with L. elliptica Maia, 2003 ( Madeira et al. 2003); tarsal claws 1-toothed with (couplet 8’) L. maricaensis Rodrigues & Maia, 2010 ( Rodrigues & Maia 2010), and antennal horn of pupa developed (couplet 1), conspicuous apical setae of pupa, 0.05 mm long (couplets 2 and 3’), simple dorsal abdominal spines of pupa present, (couplets 4’ and 6) with L. spinosa Maia, 2004 . Despite the similarities, the following set of characteristics differentiates L. mataybae sp. nov. from its congeners:palpi 4-segmented;male cerci bilobed, with outer lobe longer than inner; male hypoproct short, as long as inner cercus lobe; aedeagus 1.5 times longer than hypoproct; apex of aedeagus with irregular edge; and inducing galls on M. guianensis .

Figures

Figs. 1–7. Lopesia mataybae sp. nov. (1). Third male flagellomere (frontal view). (2). Third female flagellomere (frontal view). (3). Twelfh male flagellomere with apical process (frontal view). (4). Male tarsal claws and empodia. (5). Male wing. (6). Male terminalia (dorsal view). (7). Female postabdomen (lateral view).

Figs. 8–11. Lopesia mataybae sp. nov. (8). Pupal head (ventral view). (9). Prothoracic spiracle. (10). Sixth pupal abdominal tergite (dorsal view). (11). Larval ter- minal segment (dorsal view).

Fig. 12. Cylindrical leaf galls of Lopesia mataybae sp. nov. on Matayba guianensis (Sapindaceae). Arrow marks gall.