Coelotrypes luteifasciatus (Senior-White), 2005

David, K. J. & Hancock, D. L., 2019, Taxonomic notes on genus Coelotrypes Bezzi (Diptera: Tephritidae: Trypetinae) with description of two new species, Zootaxa 4563 (3), pp. 584-594 : 588-591

Coelotrypes luteifasciatus (Senior-White)

( Figs 21 ̄31)

Staurella luteifasciata Senior-White 1922: 158 .

Euphranta luteifasciata (Senior-White) ; Norrbom et al., 1999: 149.

Coelotrypes luteifasciatus (Senior-White) ; Hancock and Drew, 2005: 6.

Diagnosis: This species has been described by Senior-White (1922) except for male and female genitalia. Flies are reddish brown with fulvous face in both sexes, prominent yellow medial vitta and lateral black stripes on scutum. Wing hyaline with subapical band and prominent apical band. Abdomen reddish-brown with lateral black stripes. Epandrium black basally, fulvous apically (dome-shaped in profile view) with elongate tubular proctiger possessing tuft of black hairs along its entire length. Phallus 1.8 mm long; glans of phallus with ring-shaped, patterned acrophallus and prominent vesica. Oviscape reddish brown, 1.5 mm long, aculeus short (0.9 mm) with trilobed tip, four pairs of preapical setae and 4 preapical indentations. Eversible membrane (1.3 mm) with well developed taeniae, spicules on distal end conical, spermatheca oblong with numerous elongate spine-like projections.

III instar larva: Cephalic segment or gnathocephalon ( Fig. 35 ) short with sensory lobes separated by shallow medial depression. Antenna 2-segmented with basal segment longer than apical segment; apical segment almost conical. Maxillary sense organ (= palpus) with 4 visible sensilla and additional 2 sensilla placed slightly anterolaterally to it.

Preoral (stomal sensory) organ without teeth; number of peg-like sensilla indistinguishable. Facial mask almost bean shaped, mouth opening surrounded with 9 serrated oral ridges. Accessory plates and median oral lobe between mouthhooks not developed. Oral teeth present.

Mouthhook (mandibular sclerite) ( Fig. 32 ). Broad with blunt, short apical hook and preapical tooth as deep as apical hook. Ventral apodeme broad, perpendicular to mandibualar sclerite. Hypopharyngeal (= hypostomal) sclerite almost bar-shaped, as long as mandibular sclerite, heavily sclerotised and fused to pharyngeal sclerite, hypopharyngeal bridge beyond the centre of the sclerite. Parastomal sclerite/bar reaching middle of hypostomal sclerite. Dental sclerite absent. Labial (subhypostomal) sclerite with elongate arms. Anterior sclerite not sclerotised; dorsal and ventral cornua light brownish, anterior margin of dorsal bridge oblique, parallel to hypopharyngeal sclerite; ventral bridge not prominent.

Thoracic and abdominal segments. Smooth with dorsal, lateral and ventral spinules on T1̄T3. Abdominal segments with ventral spinules restricted to creeping welts ( Fig. 40 ). Anterior spiracle with 12 tubules ( Figs 33 , 37 ).

Caudal segment with spiracular area oblique in profile, limited by dorsal sensilla, lateral sensilla and caudal ridges with sensilla. Posterior spiracle ( Figs 34 , 39 ) with three spiracular slits, each 3̄4 times as long as wide. Dorsal and ventral spiracular bundles with 5¯6 single or double hairs per group; lateral spiracular bundle with 6¯7 single or double hairs. Spiracles placed apart, shortest distance between the spiracles longer than length of individual spiracular slit. Anal lobes ( Fig. 38 ) flat with 5̄6 rows of spinules anterior and posterior to the lobes.

Length. 6.9–7.8 mm long, 1.2–1.5 mm wide (N=4).

Host plant: Argyreia nervosa (Burm. f.) Bojer ( Convolvulaceae )

Material examined: 1♂, INDIA: Karnataka: Attur , 29.viii.2016 , Prabhu, G., 4♀♀, 2♂♂, same data except 18.vii. 2017 ; 1♂, same data except 27.vii.2017 ; 1♂, same data except 15.viii.2017 ; 1♂, same data except 04.x.2017 ; 1♂, same data except 17.x.2017 ; 1♂, same data except 26.x.2017 ; 1♂, 1♀, INDIA, Karnataka, CHES, Chettalli , 05.iv.2018 , David , K. J. ( ICAR- NBAIR)

Larvae: 3 specimens, label data as above (preserved in 70% ethanol); 1 specimen dissected (stored in glycerine in genitalia vial with the label).

Figures

FIGURES 21–25. Coelotrypes luteifasciatus (Senior-White); 20, head (lateral view); 21, scutum (dorsal view); 22, thorax (lateral) and legs; 23, abdomen (a, male; b, female); 25, wing.

FIGURES 35–39. SEM images of III instar larva of Coelotrypes luteifasciatus. 35, pseudocephalon (frontal view); 36, maxillary palpus; 37, anterior spiracles; 38, anal lobes; 39, posterior spiracles.

FIGURES 32–34. III instar larva of Coelotrypes luteifasciatus (Senior-White); 32, cephalopharyngeal skeleton; 33, anterior spiracle; 34, posterior spiracle.

FIGURES 39–40. Creeping welt in Coelotrypes.39, C. meremmiae sp. n.; 40, C.luteifasciatus.