Bactrocera (Bactrocera) syzygii White and Tsuruta

David, K. J., Hancock, D. L., Singh, Shakti Kumar, Ramani, S., Behere, G. T. & Salini, S., 2017, New species, new records and updated subgeneric key of Bactrocera Macquart (Diptera: Tephritidae: Dacinae: Dacini) from India, Zootaxa 4272 (3), pp. 386-400 : 394

Bactrocera (Bactrocera) syzygii White and Tsuruta

( Figures 4a ̄k)

Bactrocera (Bactrocera) syzygii White and Tsuruta in Tsuruta and White, 2001: 85 .

Diagnosis. Medium sized, black species (5.2̄ 5.7 mm), face fulvous with small, circular black spot in each antennal furrow, scutum black with broad (> 0.15 mm), yellow lateral postsutural vitta ending at intra-alar seta, without medial postsutural vitta, anepisternal stripe slightly broader than notopleuron, reaching midway between notopleuron and anterior notopleural seta, continued as a small spot on katepisternum, scutellum yellow with narrow, black basal band and a pair of scutellar setae, mediotergite and subscutellum black. All femora fulvous without fuscous markings, tibia fuscous, tarsal segments fulvous. Wing (4.5̄ 4.8 mm) predominantly hyaline with narrow costal band from cell bc to wing apex confluent with vein R2+3, extension of cell bcu longer than bcu, anal streak present. Abdomen oval, predominantly red-brown except broad fulvous band on tergites I+II posteriorly, a black T-shaped marking on tergites III-V and tergite III broadly fuscous laterally.

Male genitalia: Epandrium and surstyli elongate-oval in outline (posterior view), epandrium longer than lateral surstylus in profile, posterior lobe of surstylus blunt, not longer than anterior lobe. Proctiger membraneous, quadrate, smaller than epandrium. Medial surstylus longer than lateral surstylus, tapering towards apex with a pair of thick prensisetae. Aedeagus short, 1.5 mm long excluding glans (0.26 mm); 0.75 of glans sclerotised with well developed acrophallus and unpatterned praeputium; subapical lobe and basal lobe present.

Female genitalia: Oviscape black (0.7 mm); eversible membrane (0.9 mm) with spicules of eversible membrane semicircular without any projections, aculeus (1.01 mm) with apex acute and four pairs of preapical setae; two black, highly convoluted berry shaped spermathecae.

Material examined. 12 ♂♂, INDIA, Kerala, Kollam, Thalavoor , 31. iv. 2011, David, K. J. ; 1♂, INDIA, Kerala, Konni, Aruvipuram , 0 6. iv. 2015, T. Sivakumar ; 1♀, INDIA, Kerala, Konni, Aruvipuram , 0 6. iv. 2015, T. Sivakumar ; 1♀, INDIA, Kerala, Kollam, Thalavoor , 31. iv. 2011, Salini, S. ; INDIA, Tamil Nadu, Dindigul, Thandikudi , 0 1. ix. 2012., David, K. J. ( NBAIR).

Male parapheromone. Not known.

Host plants. Fruits of Syzygium samarangense (Blume) Merr. and Perry (Myrtaceae) .

Known distribution. Sri Lanka

Remarks. Bactrocera syzygii is similar to B. paraverbascifoliae Drew in possessing a black scutum with lateral postsutural vitta and all femora fulvous but can be differentiated by the presence of a broad postsutural vitta (> 0.15mm) and shorter aedeagus (1.5 mm). It is unique in possessing semicircular shaped spicules on distal end of eversible membrane and short oviscape (0.7 mm). It was originally described from Sri Lanka and is recorded for the first time from India.

Figures

FIGURES 4 a – k. Bactrocera (Bactrocera) syzygii Tsuruta & White. a, head (profile view); b, scutum (dorsal view); c, thorax (lateral view); d, abdomen; e, wing; f, epandrium, surstyli and proctiger (lateral view); g, epandrium and surstyli (posterior view); h, glans of phallus (lateral view); i, aculeus tip; j, spicules of eversible membrane; k, spermatheca.