Zeugodacus (Sinodacus) sinuvittatus David & Abhishek, 2024

David, Karamankodu Jacob, Abhishek, Venkateshaiah, Kennedy, Ningthoujam, Ajaykumara, K. M., Gracy, R. G. & Hissay, Cheday Bhutia, 2024, Four new species of Zeugodacus Hendel (Diptera, Tephritidae, Dacinae, Dacini) and new records of dacines from India, ZooKeys 1188, pp. 1-26 : 1

Zeugodacus (Sinodacus) sinuvittatus David & Abhishek sp. nov.

Figs 85-92

Type locality.

India, Himachal Pradesh, Totu, IARI substation, Totu.

Type material.

Holotype male, pinned. Original label: "INDIA, Himachal Pradesh, Totu, IARI substation, Totu, 18.viii.2019, David, K. J." (deposited at NIM).

Diagnosis.

Zeugodacus sinuvittatus is similar to Z. hochii (Zia), Z. infestus (Enderlein) and Z. brevipunctatus David & Hancock in possessing reddish brown scutum, club shaped abdomen and wing with broad apical black spot. It can be differentiated from Z. hochii by the absence of medial postsutural vitta, face with separate black spots unlike transverse band, presence of discontinuous costal band slightly overlapping vein R2+3; from Z. infestus and Z. brevipunctatus by the absence of lateral and medial postsutural vitta, absence of postsutural supra-alar seta, narrow costal band interrupted in cell r1 and by the broad apical spot. Unlike Z. brevipunctatus , acrophallus of Z. sinuvittatus is fully patterned.

Description.

Male. Large sized species (wing length 7.05 mm); face fulvous with two elongate black markings in the antennal furrow and a medial longitudinal line; scutum reddish brown in ground colour without lateral and medial vitta, with broad quadrate black patches in presutural and postsutural areas, notopleuron and postpronotal lobe yellow, inconspicuous yellow spot anterior to notopleural suture; anepisternal stripe reaching midway between anterior notopleural seta and notopleuron; scutellum yellow; wing predominantly hyaline with costal band slightly overlapping vein R2+3, discontinuous towards apex of cell r1, with a broad apical spot covering the apex of cell r2+3, r4+5 and upper one-fourth of cell m, anal streak narrow, no dense aggregation of microtrichia around A1+Cu2; abdomen club shaped, tergite 2 with a prominent black semicircular spot, tergites 3-5 with dark fuscous lateral markings and a narrow medial longitudinal band.

Head (Fig. 85 ). Height 1.60 mm. Frons length 1.85 × breadth; fulvous with fuscous marking on anteriomedial hump and around bases of frontal and orbital setae, all setae black: two pairs of frontal setae and one pair of orbital setae; lunule black. Ocellar triangle black, vertex yellow. Face fulvous with two separate elongate black markings in antennal furrows and a medial longitudinal black line. Scape (0.23 mm long) and pedicel (0.22 mm long) fulvous, first flagellomere (0.74 mm long) dark fuscous on outer side and apex, arista non plumose, combined length of pedicel and flagellomere longer than the vertical length of face. Gena fulvous with a black marking and a seta. Occiput fulvous; lateral and medial vertical setae present, occipital row with three or four stout black setae. Thorax (Figs 86 , 87 ). 2.18 mm long, 2.03 mm wide; scutum red brown with two black quadrate markings one each in presutural and postsutural area. Pleura red-brown in ground colour with black markings anterior to anepisternal stripe, katepisternum and anepimeron. Yellow markings as follows: postpronotal lobe, notopleuron, anepisternal stripe reaching midway between notopleuron and anterior notopleural seta and continuing to katepisternum as a transverse spot; anatergite (posterior apex black); anterior 3/5 of katatergite (remainder black). Scutellum yellow without narrow black basal band, subscutellum red-brown with black lateral margins. Chaetotaxy: scutellar seta, 1; intra-alar seta, 1; postalar seta, 1; anepisternal seta, 1; anterior notopleural seta, 1; posterior notopleural seta, 1; scapular setae, 1. Leg (Fig. 87 ): Coxa, trochanter dark fuscous, all femora with extensive fuscous markings; fore femur wholly fuscous, 0.80 of mid femur and 0.60 of hind femur fuscous; fore and hind tibiae fuscous, mid tibia fulvous, tarsal segments slight fuscous. Wing (Fig. 89 ). Length, 7.05 mm, cells bc and c hyaline; microtrichia in outer corner of cell c only; remainder of wing hyaline except dark fuscous cell sc, costal band overlapping vein R2+3, interrupted towards apical one-fourth of cell r1 and with a broad apical spot covering apex of cell r2+3, r4+5 and anterior one fourth of cell m, extension of cell cua longer than cell cua, base of cell br with microtrichia, anal streak narrow, confined to cell cua, lacks dense aggregation of microtrichia around A1+Cu2; supernumerary lobe weak. Abdomen (Fig. 88 ). 3.69 mm long, 1.92 mm wide, club shaped, tergites free, tergites 1 fulvous, tergite 2 reddish brown with a black semicircular marking, tergite 3 with broad, black basal band and pecten, tergites 4 and 5 with dark lateral margins and a narrow medial longitudinal band. Tergite 5 without prominent shining spots (ceromata).

Male genitalia. Sternite 5 brown with shallow emargination, epandrium quadrate with lateral surstylus as long as epandrium, proctiger membranous, as wide as epandrium, epandrium sclerotised (Figs 90 , 91 ), as long as wide (height 0.3 mm; width 0.34 mm); surstyli as long as epandrium, oblique, 0.38 mm long; posterior lobe of surstylus 6.2 × longer than anterior lobe, aedeagus 4.60 mm long with glans of phallus (Fig. 92 ) 0.625 mm long. Three-quarters of glans heavily sclerotised with well-developed fully patterned acrophallus, praeputium, and subapical lobe.

Etymology.

The species name is derived from Latin words sine (= without) and vitta (= band), as the species lacks lateral and medial poststurural vitta on scutum.

Host plant.

Not known, collected by sweep netting on grapevine

Male parapheromone.

Not known.

Remarks.

This species is placed in Zeugodacus due to shallow/flat posterior emargination of sternite 5 in males, posterior lobe of lateral surstylus much longer than anterior lobe and patterned acrophallus. It is placed in subgenus Zeugodacus Sinodacus as it lacks prescutellar acrostichal seta, basal scutellar seta and due the club-shaped abdomen.

Figures

Figures 85 - 92. Zeugodacus (Sinodacus) sinuvittatus David & Abhishek, sp. nov. 85 head (lateral) 86 scutum (dorsal view) 87 thorax (lateral) 88 abdomen 89 wing 90 epandrium (lateral) 91 epandrium (posteriror) 92 glans of phallus.