Neoschildomyia fusca

Gaimari, Stephen D., 2007, Three new Neotropical genera of Odiniidae (Diptera: Acalyptratae), Zootaxa 1443, pp. 1-16 : 6-7

Neoschildomyia fusca , gen. et sp. nov. ( Figs. 1 C, 2C–D, 3B, 5A–D)

Etymology. From fuscus, Latin adjective, meaning dusky, dark, referring to the dark coloration of the species.

Diagnosis. Frons with 5 fronto-orbital setae (2 reclinate posterior setae, 3 inclinate anterior setae). Lunule arched, less than half height of frons. Antenna mostly orange, except scape brownish and distal 2/3 of arista black; antennal bases distinctly separated. Gena with upturned genal seta. Palpus laterally flattened. Dorsocentral setae 1+3; prescutellar acrostichal seta absent. Prescutellum absent. Scutellum arched dorsally, densely setulose. Midtibia with 2 weak spurs. Wing vein C extending to M1; costal spinules extending to R2+3. In male: tergite 6 symmetrical, forming a sclerotized ring through lateral fusion with tergite 7; tergites 7 and 8 separate.

Adults, ɗ (Ψ unknown) Body length 4.6 mm.

Head ( Fig. 2 C–D). Height 1.8 X length; width 1.2 X height. Eye only slightly higher than long. Medial and lateral vertical setae present, moderately strong; medial one slightly stronger. Posterior part of head not concave in dorsal view. Frons 1.8 X wider than long. Postocellar setae moderately strong, divergent. Ocellar triangle brown pruinose, setulose; posterior ocelli slightly closer together than distance from anterior to one posterior ocelli; ocellar setae proclinate and diverging, moderately strong (as strong as lateral vertical seta). Frons brown, lightly covered with goldish pruinosity except along eye margin where goldish pruinosity dense; frontal stripe area lacking setulae. Fronto-orbital plate setulose laterally; with 1–2 moderately strong reclinate fronto-orbital setae in posterior 1/3, and 3 moderately strong inclinate fronto-orbital setae in anterior 1/2. Lunule 0.18 mm high, arched; 0.4 X height of frons length; brown with goldish pruinosity; lacking setulae. Antenna orange, including base of arista, remainder of arista black; scape brown with goldish pruinosity; basoflagellomere kidney-shaped, 1.6 X higher than long; arista pubescent; antennal bases separated by distance greater than 2 X diameter of single antennal socket. Face brown with goldish pruinosity; with deep antennal grooves. Oral vibrissa moderately strong, with 4–5 additional similar subvibrissal setae in row. Gena goldish pruinose; 0.45 X as high as head height; with 1 moderately strong upturned seta; setulose. Genal groove area (below eye) dark, bare of setulae. Palpus dark brown; flattened; densely setulose. Prementum and labellum dark brown, with dark setulae.

Thorax ( Fig. 1 C). Scutum 1.5 mm long, 1.1 X longer than wide; bronzy-brown pruinose with faintly darker dorsocentral vittae and median vitta; densely setulose; lateral portion of scutum (below intra-alar area) lacking setulae. Prescutellum absent. Scutellum 0.5 mm long, 1.7 X wider than long; slightly darker than scutum; densely setulose; arched dorsally. Chaetotaxy: 1+3 dorsocentrals (presutural + postsutural; posteriormost seta strongest), prescutellar acrostichal absent, 1 postpronotal (in addition to dense setulae), 2 notopleurals, 1 postsutural intra-alar (in posterior part of scutum), 1 presutural supra-alar, 2 postsutural supra-alars (posterior one strong, anterior one weak; small anterior seta duplicated on one side), 2 postalars (anterior one strongest), 2 scutellars (posterior one slightly stronger). Pleuron above katepisternum lacking setae or setulae except for 1 strong proepisternal seta; bronzy-brown pruinose. Katepisternum more sparsely pruinose, with 3 strong setae along dorsal edge, in addition to numerous setulae. Legs. Brown, except tibiae and tarsi lighter, brownish yellow. Midtibia with 2 weak spurs. Wing ( Fig. 3 B). Length 4.9 mm; 2.9 X longer than high. C extending to M1. Costal spinules extending to R2+3. Hyaline, but slightly darkened through costal cell. Halter dark brown.

Abdomen ( Fig. 1 C, inset). Tergites bronzy-brown pruinose, densely setulose; setulae along posterior edges of syntergite 1+2 through tergite 5 only slightly longer than others, more so laterally. Sternites also with setulae longest along posterior margin. Tergite 6 absent. Sternite 6 symmetrical; a transverse, long thin sclerotized strip; fused to tergite 7 laterally on both sides, to form sclerotized ring; bare. Sternite 7 hardly discernible as a short thin strip of slightly darkened membrane. Tergite 7 distinct, 7.0 X wider than long, slightly wider than tergite 8; separated from tergite 8 by thin transverse strip of membrane; fused to sternite 6 laterally on both sides; single setule near left lateral edge, otherwise bare. Tergite 8 free, as long as tergite 7, but only 5.0 X wider than long; bare.

Male genitalia ( Fig. 5 A–D). Epandrium large, relatively flattened, longer than high; setulose. Surstylus as two large lobes, separately articulating with epandrial margin; inner surstylar lobe heavily sclerotized, strongly curved inwards from ventral aspect, strap-like, with few inner distal setulae; outer surstylar lobe lightly sclerotized, thick and slightly curved inwards from ventral aspect, setulose with many fine setulae on all surfaces. Hypandrium 1.2 X longer than maximum width; anterior third slightly curved dorsad, triangular (tapering anteriorly), with base longer than lateral edges; posterior two-thirds broader than anterior third of hypandrium, tapering slightly posteriorly, U-shaped from ventral view, extending laterally around aedeagal apodeme and aedeagus as saddle. Gonopod thick, with 2 distal lobes; ventral lobe not articulated, short, broad, flattened, setulose; dorsal lobe articulated with hypandrium, longer, curved outwards distally from ventral aspect, with few tiny setulae. Paramere slightly sclerotized; elongated and curved outwards from ventral aspect; strong anteriorly to aedeagal base. Aedeagus sclerotized; teardrop-shaped from ventral aspect, pointed and upcurved posteriorly. Aedeagal apodeme rod-like, subequal in length to hypandrial length. Cercus small, setulose.

Type material. Holotype ɗ (pinned, very good condition, abdomen dissected, in small vial with glycerin on same pin; Fig. 1 C), deposited in INBio, with following labels: “ COSTA RICA. Prov. Alajuela, Upala, Albergue Heliconias, S. Laguna Danto, 1100 m, 21–26 ENE 2001, J.D. Gutiérrez, Manual L.N. 423760 298100 #61809” / “(barcode), INB0003156507, INBIOCRI COSTA RICA ” / “SDG dissection 1233 ɗ”/ “ HOLOTYPUS Neoschildomyia fusca Gaimari. ”

Distribution. Known only from Costa Rica (Alajuela Province).

Figures

FIGURE 1. Lateral habitus of holotypes of new species (for B – D, post-dissection state); inset is a dorsal view of each abdomen. Scale bar = 1.0 mm. A) Helgreelia albeto, sp. nov., Ψ (inset is a paratype). B) Helgreelia parkeri, sp. nov., ♂. C) Neoschildomyia fusca, sp. nov., ♂. D) Pradomyia hadromera, sp. nov., ♂.

FIGURE 2. Heads of new species. Scale bar = 1.0 mm. A – B) Helgreelia albeto, sp. nov., Ψ (holotype); A) anterodorsal view, B) lateral view. C – D) Neoschildomyia fusca, sp. nov., ♂ (holotype); C) anterodorsal view, D) lateral view. E – F) Pradomyia hadromera, sp. nov., ♂ (holotype); E) anterodorsal view, F) lateral view.

FIGURE 3. Wings of new species. Scale bar = 1.0 mm. A) Helgreelia albeto, sp. nov., Ψ (paratype). B) Neoschildomyia fusca, sp. nov., ♂ (holotype). C) Pradomyia hadromera, sp. nov., ♂ (holotype).

FIGURE 5. Neoschildomyia fusca, sp. nov., ♂ (holotype). Male genitalia. Scale bar = 0.01 mm. A) Epandrial complex, lateral view. B) Surstylar lobes of epandrial complex, dorsal view. C) Aedeagal complex, lateral view. D) Aedeagal complex, ventral view. a = aedeagus; aa = aedeagal apodeme; c = cercus; e = epandrium; g = gonopod; gl = articulated lobe of gonopod; h = hypandrium; isl = inner surstylar lobe; osl = outer surstylar lobe; p = paramere; dotted line = points of connection between epandrial and aedeagal complexes.