Bactrocera (Bactrocera) prabhui David, 2019

David, K. J. & Ramani, S., 2019, New species, redescriptions and phylogenetic revision of tribe Dacini (Diptera: Tephritidae: Dacinae) from India based on morphological characters, Zootaxa 4551 (2), pp. 101-146 : 106-108

Bactrocera (Bactrocera) prabhui David , sp. nov.

Description: Medium sized (6.6̄ 6.9 mm), black species. Frons fulvous with two frontal setae and single orbital seta, ocellar triangle black, ocellus fuscous, outer vertical seta and medial vertical seta present; occiput fuscous with a row of thin, black postocular setae; face fulvous with elongate, black spot in each antennal furrow and a medial longitudinal black band, gena fulvous with subocular spot and seta. Scape, pedicel fuscous; first flagellomere dark fuscous; combined length of pedicel and first flagellomere as long as the vertical length of face ( Fig. 2A ). Scutum (2.5̄ 2.9 mm long; 1.9̄ 2.2 mm wide) black with narrow, yellow lateral postsutural vitta tapering to end before intra-alar seta. Yellow markings as follows; postpronotal lobe, notopleuron, anepisternal stripe (as broad as notopleuron, continued as a small spot on katepisternum), 0.6 of katatergite and 0.9 of anatergite. Scutellum yellow with narrow, black basal band and a pair of scutellar setae, mediotergite and subscutellum black. Chaetotaxy; 2 scapular setae, 1 anterior notopleural seta, 1 notopleural seta; 1 anepisternal seta, 1 post-alar seta, 1 intra-alar seta, 1 prescutellar acrostichal seta, 1 scutellar seta. Legs; coxa, trochanter black, all femora with fuscous markings (0.9 of fore femur 0.25 of midfemur and hindfemur), tibia fuscous, tarsal segments fulvous ( Fig. 2B,C ). Wing (5.2̄ 5.9 mm) predominantly hyaline with narrow costal band from cell sc to wing apex slightly overlapping vein R 2+3, expanded slightly beyond vein R 2+3, base of cell br fully covered with microtrichia, extension of cell bcu longer than bcu and well developed anal streak ( Fig. 2E ). Abdomen (2.6̄ 2.8 mm long; 2.9 mm wide), oval, predominantly black except fulvous band on tergites I ⅈ broad, medial longitudinal, black band from tergites IIĪV present; lateral regions of tergites IIĪV predominantly black ( Fig. 2D ).

Female genitalia: Oviscape black (1.39 mm); spicules on distal end of eversible membrane (2 mm) conical with three to four pointed projections ( Fig. 2J ). Aculeus ( Fig. 2F ) elongate (1.24 mm) with length to width ratio, 6.2; aculeus tip mucronate with two pairs of weakly developed preapical setae ( Fig. 2G, H ); two black, convoluted, mulberry shaped spermathecae ( Fig. 2I ).

Material examined: Holotype ♀, INDIA, Karnataka, Kodagu, Somwarpet , 24-26.vi.2017, Prabhu, G. ( NBAIR) . Paratype 1♀, same data as of Holotype ( NBAIR), Paratype 1♀, same data as of Holotype ( UASB) .

Etymology: The species name is after its collector, Prabhu, G.

Remarks: Bactrocera prabhui is similar to B. caryeae and B. furcata in having a predominantly black scutum with narrow lateral postsutural vitta, predominantly black abdomen, elongate-oval black facial spots and markings on all femora; but can be clearly differentiated from the former by the femoral markings ( Fig. 2C ) (extensive markings covering entire femur), costal band overlapping vein R 2+3 ( Fig. 2E ), mucronate aculeus tip (acute in B. caryeae ), two pairs of weakly developed preapial setae in aculeus ( Fig. 2H ) (four pairs in B.caryeae ), conical spicules of eversible membrane ( Fig. 2J ) (broad spicule with several projections of equal size in B.caryeae ) and dense aggregation of microtrichia in the base of cell br and along vein Cu 2. B. prabhui can be distinguished from B. furcata by mucronate aculeus tip (bifid in B. furcata ), conical spiclues of eversible membrane with 3-4 projections (single cone like projections in B. furcata ) and costal band overlapping vein R 2+3. It is similar to B. fastigata by lacking postsutural supra-alar seta, but differs with respect to narrow anepisternal stripe (broad stripe in B. fastigata reaching anterior notopleural seta), parallel sided narrow postsutural vitta of uniform width (lateral vitta tapering posteriorly in B. prabhui ), costal band overlapping vein R 2+3, broad anal streak, densely microtrichose base of cell br, extensive fuscous markings on femora and extensive black markings on all tergites.

Figures

FIGURE 2. Comparison between B. (B.) prabhui sp.nov. and B. (B.) caryeae (Kapoor).(A&K) head; (B&L) scutum; (C&M) thorax lateral view & legs; (D&N) abdomen; (E&O) wing; (F,G,H &P) aculeus; (I&R) spermatheca; (J&Q) spicules on distal end of eversible membrane.