Platensina flavistigma David & Hancock, 2022

David, K. J., Hancock, D. L., Sachin, K., Gracy, R. G. & Salini, S., 2022, Two new species of Platensina Enderlein (Diptera, Tephritidae, Tephritinae, Dithrycini) from India, ZooKeys 1092, pp. 123-146 : 123

Platensina flavistigma David & Hancock sp. nov.

Platensina quadrula : Hancock 2012: 315 (misidentification, India record).

Type locality.

India: Karnataka, Bangalore, Attur.

Type data.

Holotype male, pinned. Original label: "INDIA: Karnataka, Bangalore, Attur, 05.ii.2020, Sachin K (NIM)". Paratypes: India: Periyakulam, 30.iii.2012, David, K. J. (1♂ NIM); India, Tamil Nadu, Thandikudi, C.R.S, 31.iii.2012, David, K. J. (1♂ NIM).

Diagnosis.

This species is similar to P. quadrula Hardy from Thailand, Cambodia and Vietnam in the presence of two broad quadrate areas in wing cell r1, an enlarged basal discal spot in cell r4+5 and large, broad hyaline indentations in cell cua. It can be differentiated by the lack of silvery facial spots and white rather than silvery parafacial stripes in males, as well as the angulate posterior wing margin, pterostigma predominantly fulvous/yellow and pale brown, and epandrium of uniform width throughout its length, whereas in P. quadrula the parafacial is silvery rather than white and facial silvery spots are present lateroventrally in males, the wing is evenly rounded posteriorly, the pterostigma is hyaline basally and dark brown apically, and the epandrium tapers apically. This species was mistakenly listed as P. quadrula from India by Hancock (2012).

Description.

Male. Medium-sized fly (4.10-4.99 mm long) with broad, angulate wing with fulvous markings (Figs 9 , 10 ).

Head (Figs 11 , 12 ). as high as long; frons fulvous with three pairs of frontal setae and two pairs of orbital setae; ocellar triangle dark brown, with well-developed ocellar seta; medial vertical seta black; lateral vertical seta, paravertical seta and postocellar setae white; postocular setae black interspersed with prominent, white lanceolate setae. Face fulvous with broad orange-brown patches on ventral half of antennal groove. Scape and pedicel fulvous, first flagellomere shorter than face, concolorous with frons, arista short pilose. Parafacial alongside ventral half of face distinctly whitish. Gena narrow, with prominent genal seta, subvibrissal setae present.

Thorax (Figs 14 , 15 ). Scutum uniformly grey microtrichose with creamy-white setulae. Chaetotaxy well developed: 1 postpronotal, 1 presutural supra-alar, 1 anterior notopleural, 1 posterior notopleural, 1 postsutural supra-alar, 1 dorsocentral placed in line with postsutural supra-alar, 1 postalar, 1 intra-alar, and 1 prescutellar acrostichal seta. Scutellum grey with two pairs of scutellar setae; apical one less than half length of basal one. Anepisternum grey, with single seta near phragma; anepimeron grey, with single seta, katepisternum fulvous, with single seta; anatergite dark brown; katatergite and meron fulvous. Legs predominantly fulvous without any black/dark markings; forefemur with single row of 4 ventral setae.

Wing (Fig. 16 ) broad, angulate, length 4.44-4.99 mm, length/width ratio, 1.92-2.05; predominantly dark brown with hyaline indentations and spots; cell bc hyaline, cell c predominantly hyaline with pale basal and medial infuscations, pterostigma fulvous basally, dark brown apically, cell r1 with two broad quadrate indentations and small posterior subapical hyaline spot, the proximal quadrate indentation extended to vein R4+5, cell r4+5 with large circular hyaline spot near base and large, semicircular hyaline apical spot, cell dm with two large hyaline spots, cell m with two marginal hyaline marks, subbasal one much larger than subapical one, cells r2+3 and r4+5 with indistinct and isolated pale brown subapical spots, cell cua with three large marginal hyaline indentations, basal two almost reaching vein CuA, and anal lobe with two broad subhyaline markings, proximal one crossing into cell cua.

Abdomen (Fig. 13 ). Entirely black with yellowish orange patches laterally on tergites 1-3.

Male genitalia. Epandrium broad, lateral surstylus as broad as epandrium (Fig. 17 ); apex of lateral surstylus blunt (in lateral view); proctiger short, smaller than epandrium; epandrium oval in posterior view (Fig. 18 ); medial surstylus shorter than lateral surstylus and with well developed prensisetae (lateral one broader than medial one). Phallus elongate (1.78 mm long), with sclerotised acrophallus (Fig. 19 ).

Female. Unknown

Etymology.

The specific name is derived from two Latin words flavus (=yellow) and stigma (=ptersotigma).

Distribution.

Karnataka and Tamil Nadu (southern India).

DNA Barcode.

NCBI GenBank accession number - MT019893 (1♂, India: Karnataka, Bangalore, Attur, 17.v.2018, Prabhu, G.)

Figures

Figures 9 - 10. Habitus of Platensina flavistigma David & Hancock, sp. nov. 9 dorsal view 10 lateral view.

Figures 11 - 16. Platensina flavistigma David & Hancock, sp. nov. 11 head (profile view) 12 head (frontal view) 13 abdomen (dorsal view) 14 thorax (lateral view) and legs 15 scutum 16 wing.

Figures 17 - 19. Platensina flavistigma David & Hancock, sp. nov. 17 epandrium (lateral view) 18 epandrium (posterior view) 19 glans of phallus.