Pauximyia vidali, Limeira-De-Oliveira & Marques & Gaimari & Rafael, 2020

Limeira-De-Oliveira, Francisco, Marques, Dayse Willkenia A., Gaimari, Stephen D. & Rafael, José A., 2020, Pauximyia, a new genus of Odiniidae (Diptera: Acalyptratae) with description of two new species from Brazil, Zootaxa 4728 (2), pp. 227-236 : 233-236

Pauximyia vidali sp. nov.

( Figs 13–23 )

Etymology. Named in honor to the collector of the specimen, João Ferreira Vidal.

Diagnosis. Lunule with white pubescence. Antenna with scape and pedicel light brown. Gena yellowish. Hind femur flattened laterally, with 3 setae in anteroventral surface, middle one stronger. Hind tibia very short about half length of mid tibia. Gonocoxal apodeme with forked appearance, terminating distally as a broad triangle.

Holotype ♂. Body length 3.5 mm.

Head ( Figs 13–16 ). Height 1.36X the length; width 2.27X the length and 1.67X wider than high. Eye slightly higher than long. Postocellar setae strong, divergent. Ocellar triangle brownish-yellow pruinose, setulose; posterior ocelli slightly closer together than distance between posterior and anterior ocelli; ocellar setae strong (as strong as posteriormost orbital seta). Medial and lateral vertical setae present, strong. Postcranium not concave in dorsal view. Frons 1.52X wider than long. Fronto-orbital plate silvery-yellow, sparsely setulose, with 3 fronto-orbital setae, anterior pair inclinate and two posterior reclinate. Lunule 0.15 mm high, arched, 0.40X height of frons length, silvery pubescence, lacking setulae. Antenna with scape and pedicel light brown, postpedicel rounded, yellow including base of arista, remainder of arista black; arista pubescent; antennal bases separated by distance less than diameter of single antennal socket. Face yellowish, silvery pruinose, including antennal grooves; bare of pruinescence along oral margin. Oral vibrissa strong, with 2 additional subvibrissal setae. Gena ground color yellow, with silvery pruinescence, setulose with 5–6 strong setae, none upturned, genal groove concolorous with gena and face. Palpus yellow, slightly flattened laterally, with several stout setulae in addition to weaker setulae. Prementum and labellum yellow, with light setulae.

Thorax ( Figs 13, 17 ). All macrosetae with alveolar margins darkened, slightly raised. Scutum mostly silverygrey pruinose with brown to dark brown markings, with dark brown pruinose medial vitta bifurcated and becoming faint at the level of the 2nd (from posterior to anterior) dorsocentral; medial vitta with dense setulae, denser than adjacent areas of scutum; laterally with brown pruinose vitta from anterior part of scutum (dorsal of postpronotum) through presutural intra-alar, postsutural supra-alar, and postalar setae; additional small brown pruinose line along notopleural setae; lateral portion of scutum (below intra-alar area) lacking setulae. Prescutellum absent. Scutellum concolorous with scutum, with basal medial subtriangular mark. Chaetotaxy: 1+4 dorsocentrals (presutural + postsutural; posteriormost seta strongest), 1 prescutellar acrostichal (as strong as anterior dorsocentral), 1 postpronotal with several additional setulae, 2 notopleurals, 2 postsutural intra-alars (in posterior part of mesonotum, posterior stronger), 1 presutural supra-alar, 2 postsutural supra-alars (posterior stronger; without additional setae between to these), 2 postalars (posterior one slightly weaker) with 1–2 smaller setulae between, 2 scutellars. Pleuron above katepisternum lacking setae or setulae except for 1 propleural seta and 1 strong proepisternal seta; silvery-grey pruinose except for thin brown pruinose stripe through anepisternum. Katepisternum brown, more sparsely pruinose, with 3 strong setae along dorsal edge, in addition to 1–3 setulae. Legs ( Fig. 13 ). Brown, except yellow at apical tips of femora and proximal ends of tibiae. Hind femur enlarged and laterally-flattened, with 3 setae on the anteroventral surface, the middle one much stronger. Fore tibia with 3 dorsal and 2 ventral weak spurs, mid tibia with 2 strong spurs; hind tibia with 2 weak spurs, hind tibia very short, about half length of mid tibia. Wing ( Fig. 18 ). Length 2.80 mm, width 1.20 mm, 2.33X longer than width. Vein C extended to R 4+5. Costal spinules extended to halfway point between R 2+3 and R 4+5. Membrane faintly brown infuscated, with distinct dark spots along r-m and dm-m crossveins; slightly darkened along bm-m crossvein, and fork of Rs. Halter yellow.

Abdomen. Silvery-grey to greyish pruinose with large brown lateral spots. Syntergite 1+2 brown pruinose, except for small silvery-grey spots posterolaterally and yellow at posterior edge. Tergites setulose, with longer setulae along posterior edges and laterally on syntergite 1+2; alveolae of setulae along posterior edges brown. Tergites 3–5 silvery-grey pruinose, with large paired brown pruinose patches dorsally, encompassing anterior edges of tergites but not reaching posterior edges, yellow at posterior edges. Tergite 6 ( Figs 19, 21 ) sclerotized, wide, right side 2X longer than left side. Sternite 6 absent. Syntergosternite 7+8 ( Figs 19, 21 ) small, 8X wider than long, lightly sclerotized, bare.

Male genitalia ( Figs 19–23 ). Epandrium globose; setulose. Surstylus as two small lobes fixed (not articulated) to the epandrium; inner and outer surstylar lobes subequal in size. Hypandrium about 1.5X longer than the maximum width; posterior 2/3 ventrally curved, subtriangular (tapered anteriorly), with lateral edges longer basally; anterior third as broad as posterior part, tapered slightly posteriorly, concave in lateral view, extended laterally around phallapodeme and phallus. Gonocoxal apodeme with fork-like appearance, terminating distally as a broad triangle, with light setulae. Pregonite broad with little medial curve. Posgonite as small lobe directed ventrally. Phallus bulbous; membranous, covered with tiny spicules. Phallapodeme rod-like, about 2X longer than length of hypandrium. Cercus small, setulose.

Female. Unknown.

Type material examined. HOLOTYPE ♂ (pinned, very good condition, abdomen dissected, in small vial with glycerin on same pin), deposited in INPA, with following labels: “ BRASIL, Pará, Óbidos, Igarapé Curuçambá , 01°50’04”S, 55°29’26”W, 01–08.ix.2001 [Armadilha] Malaise, J.A. Rafael & J.F. Vidal. ”

Distribution. Brazil (Pará state).

Remarks. Pauximyia vidali sp. nov. differs from the Pauximyia oliveirai sp. nov. in having the lunule entirely white (with velvet black band through upper part of antennal bases in P. oliveirai ); the hind tibia about half length of fore tibia (hind tibia almost as long as fore tibia in P. oliveirai ); tergite 6 sclerotized and long (tergite 6 with membranous appearance in P. oliveirai ); sternite 6 absent (sternite 6 present, asymmetrical, apparently connected anterodorsally to syntergosternite 7+ 8 in P. oliveirai ); the gonocoxal apodeme terminating distally as a broad triangle (gonocoxal apodeme terminating distally as small concavity, almost straight in P. oliveirai ).

Figures

FIGURES 13–18. Pauximyia vidali sp. nov., Holotype ♂. 13, habitus, lateral view (abdomen dissected); 14, head, lateral view; 15, head, anterodorsal view; 16, head, frontal view; 17, thorax, dorsal view; 18, wing.

FIGURES 19–23. Pauximyia vidali sp. nov., Holotype ♂. 19, terminalia, dorsal view; 20, epandrium, cercus, surstylar lobes and phallus, posterior view; 21, terminalia, lateral view; 22, epandrium, hypandrium, gonocoxal apodeme, pregonite, postgonite and phallus, ventral view; 23, epandrium, gonocoxal apodeme, pregonite, postgonite and phallus, ventral view inclined.