Neogriphoneura corrugata Mello & Silva

Mello, Ramon Luciano De & Silva, Vera Cristina, 2008, A taxonomic review of Neogriphoneura Malloch, 1924 (Diptera: Lauxaniidae), with description of three new species, Zootaxa 1806, pp. 35-46 : 39-41

Neogriphoneura corrugata Mello & Silva , sp. nov.

( Fig. 2 )

Diagnosis. Body unspotted, ocellar seta tiny.

Description. Male. Head ( Figs. 2A–B ). Ocellar triangle close to vertex, slightly brown, mostly colored around ocelli. Frons brownish yellow, unspotted; rectangular, wider than long; middle anterior margin strongly concave in dorsal view. Face yellow, unspotted; slightly convex in ventral part. Parafacial whitish pruinose, wide, narrower in the ventral part. Gena yellowish to white. Eye oval, higher than long, posteroventral outline slightly concave. Antenna brownish yellow: scape shorter than pedicel; first flagellomere two times longer than wide; arista black, long, plumose. Occiput brownish yellow. Chaetotaxy: outer vertical seta reclinate, 1/3 length of inner vertical seta; ocellar seta tiny, convergent; postocellar seta strong, convergent; anterior orbital seta inclinate, longer than posterior seta, posterior seta reclinate; 2 genal setae. Thorax. Mesonotum brownish yellow, unspotted; pleurae brownish yellow; scutellum triangular, bare, flat. Chaetotaxy: dorsocentral setae arranged 0+3 (anterior most seta close to suture); 1 postpronotal seta; 2 notopleural setae; 1 prescutellar acrostichal seta; 6 rows of acrostichal hairs; intra-alar seta absent; 1 presutural and 1 postsutural supra-alar setae; 2 postalar setae; 1 katepisternal seta; 1 anepisternal seta; 1 proepisternal seta; anepimeron with 1 hair; 2 scutellar setae, apical pair parallel. Legs: yellow to whitish. Chaetotaxy: fore femur with posterodorsal and posteroventral rows of setae, 1 posterior row of setae; fore tibia with 1 apical dorsal seta; mid femur with anterior row of setae and 1 apical posterior seta; mid tibia with 1 preapical dorsal seta, 1 strong apical ventral seta;

hind femur with 2 apical dorsal setae, 1 preapical dorsal seta; hind tibia with 1 preapical dorsal seta. Wing ( Fig. 2C ): brownish; unspotted; costa sapromyziform; R bare; crossvein r-m in the middle of discal cell; crossvein dm-cu in the middle of r4+5; longitudinal veins almost parallel; anal vein as long as length of cell cup. Halter brownish yellow. Abdomen. Brownish, unspotted; in males segments 7 and 8 fused forming an incomplete ring ventrally. Male terminalia. Epandrium ( Figs. 2D–E ) with three apical setae; horseshoe-shaped in dorsal view, and concave medially in lateral view; membranous region between cercus and epandrium wide. Surstyli very long, spatulated, free from epandrium. Hypandrium ( Fig. 3F–G ) as an incomplete ring around aedeagal base; with sub-lateral projection, with 3 medial setae. Paramere absent. Aedeagus ( Fig. 2F–G ) well developed; with medial stylets on apical portion; aedeagal apodeme small. Cercus wide, papillate. Female. Terminalia ( Fig. 2H ). Segments 6 and 7 as incomplete arcs, segment 7 slightly smaller than segment 6; sternite 8 modified as a shield, strongly sclerotized, long. Hypoproct and epiproct small. Cercus long. Spermathecae: three (1+2), tubular, wrinkled and segmented ( Fig. 2I ).

Etymology. The epithet of the species comes from the Latin adjective corrugatus, meaning wrinkled, ridged, to denote the shape of the spermathecae of the species.

Distribution. Jamaica, British Virgins Islands, Cayman Islands.

Material examined. Holotype, male; BRITISH VIRGINS ISLANDS, Guana Islands, 0–80 m, S. E. & P. M. Miller col., 5–23.vii.1985 ( USNM). Paratypes, as holotype, but 1–14. vii.1984, 6 females ( USNM); 15– 23. vii.1985, 1 female ( USNM); 17–19. vii.1986, 1 male ( USNM). JAMAICA: Runaway Bay, W. W. Wirth col., ii.1969, 1 male ( USNM). CAYMAN ISLANDS: Floyd Banks col., 10–13. viii.1983, 1 male, 3 females ( USNM); 3.ii.1983, 1 female ( USNM); 30.xi.1983, 1? ( USNM). PUERTO RICO: rio Pedras, Agr. exp. Sta., 15–18.x.1968, S. Medina Gaud. coll., 1 male ( UCD).

Comments. This species is similar to N. sordida , differing by the absence of a pale, narrow, brown stripe in the middle of the frons, and also in details of the male terminalia: the epandrium has no free surstili, the aedeagus is narrower and the hypandrium has no sub-lateral projection in N. sordida .

Figures

FIGURE 2. A – I. Neogriphoneura corrugata sp. nov.. Fig. A, head, frontal view; Fig. B, head, lateral view; Fig. C, wing; Fig. D, epandrium, dorsal view; Fig. E, epandrium, lateral view; Fig. F, aedeagal complex, ventral view; Fig. G, aedeagal complex, lateral view; Fig. H, female terminalia, ventral view; Fig. I, spermathecae. Scales: 0,1 mm, except C, 0,5 mm.

FIGURE 3. A – I. Neogriphoneura pacata sp. nov.. Fig. A, head, frontal view; Fig. B, head, lateral view; Fig. C, wing; Fig. D, thorax, dorsal view; Fig. E, epandrium, dorsal view; Fig. F, epandrium, lateral view; Fig. G, aedeagal complex, ventral view; Fig. H, aedeagal complex, lateral view; Fig. I, female terminalia, ventral view; Scales 0,1 mm, except C, 0,5 mm.