Neopachycerina aristata Malloch, 1933

Silva, Vera Cristina & Frare, Livia Maria, 2018, Taxonomic revision of the Neotropical Lauxaniidae genus Neopachycerina Malloch, 1933 (Diptera: Schizophora), with description of a new species, Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 58, pp. 1-8 : 3

Neopachycerina aristata Malloch, 1933 ( Figs. 1 , 3E, 3F )

Neopachycerina aristata Malloch, 1933: 358 , fig. 67c (head). Type locality: Uruguay, Montevideo. Refs.: Davies & Miller (2008: 151; fig. 31, male terminalia), Silva (2014, new record from Argentina).

Diagnosis: Brownish yellow body; arista black, thickened by dense black short setulae both above and below, with some longer, outstanding hairs on upper side basally; wing yellowish.

Redescription: Male and female. Length: body 3.8 mm; wing 3.5 mm.

Head ( Figs. 1A, B, C ): vertex rounded; ocellar triangle close to vertex, ocellar tubercle well developed, velvet black, contrasting with the pale ocelli. Frons rectangular, wider than long; in profile slightly convex, in profile; slightly concave anteriorly, in dorsal view. Face almost straight, but outstanding medially, in profile; lunule exposed; lower facial margin short. Eye small, rounded oval, posteroventral outline concave, lower half strongly narrowed. Parafacial and gena wide, whitish pruinose. Mouthparts yellow; palpus brown with paler base. Antenna: scape shorter than pedicel; first flagellomere long, oval, tapering toward apex; arista black, thickened by dense black short setulae both above and below, with some longer outstanding hairs on upper side basally. Chaetotaxy: outer vertical seta long, ½ length of inner vertical seta; ocellar setae very long, strong, diverging; postocellar setae short, cruciate; fronto-orbital setae reclinate, anterior seta ⅓ length of posterior one; 2 genal setae; supravibrissal setae short.

Thorax ( Fig. 1A ): Yellowish brown; scutum slightly arched, small dark stripe from katepisternum to wing base; scutellum triangular with rounded apex, flat. Chaetotaxy: 0+3 dorsocentral setae, anterior seta small- er and close to suture; 1 postpronotal seta; 2 notopleural setae; 1 small prescutellar acrostichal seta; 6 rows of acrostichal setulae; intra-alar seta absent; 1 presutural and 1 postsutural supra-alar setae; 2 postalar setae; 1 proepisternal seta; 1 katepisternal seta; 1 anepisternal seta; anepimeron bare; 2 scutellar setae,apical pair parallel. Legs: yellow, tarsi darker; fore tibia thick and laterally compressed. Chaetotaxy: fore coxa with 1 preapical dorsal seta, 3 apical dorsal setae; fore femur with posterodorsal, posterior and posteroventral rows of setae; fore tibia with 1 short preapical dorsal seta; mid coxa with apical row of setae; mid femur with anterodorsal row of setae and 1 short apical posteroventral seta; mid tibia with 1 preapical anterodorsal seta, 1 strong apical ventral seta and many apical strong setulae; hind coxa with 1 posterior seta and 1 apical dorsal seta; hind femur with 1 subapical anterodorsal seta, and 2 small anteroventral subapical setae; hind tibia with 1 short preapical seta. Wing ( Figs. 1A, D ): yellowish hyaline, brownish veins; costa sapromyziform (costal spinules not reaching apex of vein R₄ ₊ ₅); Radial veins bare; crossvein r-m before middle of discal cell; crossvein dm-m before middle of r₄ ₊ ₅; longitudinal veins almost parallel; anal vein shorter than length cell cua. Halter yellow.

Figures

Figure 1. Neopachycerina aristata Malloch.(A) Habitus,lateral view;(B) Head,dorsal view; (C) Head,lateral view;(D)Wing.Scales 0.5 mm.

Figure 3. Neopachycerina nigra Silva & Frare,sp. nov.,figs.A-D: (A) Male terminalia, ventral view;(B) Male terminalia,lateral view;(C) Female terminalia,ventral view;(D) Spermathecae.Neopachycerina aristata Malloch,figs.E-F:(E) End of female abdomen,ventral view;(F) Spermathecae.Scales 0.1 mm.