Bactrocera (Bactrocera) rufivitta, Drew & Ma & Smith & Hughes, 2011

Drew, R. A. I., Ma, Jing, Smith, S. & Hughes, J. M., 2011, The Taxonomy And Phylogenetic Relationships Of Species In The Bactrocera Musae Complex Of Fruit Flies (Diptera: Tephritidae: Dacinae) In Papua New Guinea, Raffles Bulletin of Zoology 59 (2), pp. 145-162 : 154-155

Bactrocera (Bactrocera) rufivitta , new species

( Fig. 4 )

Material examined. – Holotype male, PAPUA NEW GUINEA: Morobe Province, Gabensis Village , 9 Jun.2000, S. Sar and S. Balagawi, attracted to cue lure, (trap P407).

Paratypes. – 1 male, same data as holotype ; 1 male, PNG, Morobe Province, Forest Res Inst. Lae Botanical Gardens, 27 Apr.1999, A. Mararuai, (trap P402) ; 3 males, Morobe Province, 21–24 Aug.1999, S. Sar, used for DNA analyses coded Alc 19, Alc 93, Alc 99 .

Location of Types. – Holotype ( T. 152256) in QM; 5 paratypes in QDPI.

Diagnosis. – A medium sized species; face fulvous with a pair of medium sized oval black spots; postpronotal lobe and notopleuron yellow; scutum dull black; two lateral postsutural vittae present; medial postsutural vitta absent; mesopleural stripe reaching midway between anterior margin of notopleuron and anterior npl. seta dorsally; scutellum yellow; wings with a narrow dark fuscous costal band slightly overlapping R 2+3, narrow fuscous to dark fuscous cubital streak, cells bc and c colourless, microtrichia in outer corner of cell c only; abdominal terga III–V orange-brown with a narrow to medium width medial longitudinal black band and pale fuscous to fuscous anterolateral corners on each of the three terga.

Description. – Male.

Head. – Vertical length 1.7 mm. Frons length 1.5 times breadth; red-brown without dark markings; anteromedial hump with a small number of short dark hairs; orbital setae black; 1 s.or.; 2 i.or.; lunule pale fuscous. Ocellar triangle black. Vertex red-brown. Face fulvous with a pair of medium sized oval black spots; length 0.5 mm. Genae red-brown, pale fuscous subocular spot; seta absent. Occiput red-brown, with occasional pale fuscous blotches, fulvous along eye margins; occipital row with a few short red-brown setae. Antennae with segments 1 and 2 red-brown, segment 3 absent; length of segments: 0.14 mm, 0.34 mm.

Thorax. – Scutum dull black with paler markings as follows: red-brown below lateral postsutural vitta, around mesonotal suture, between notopleuron and postpronotal lobe, inside postpronotal lobe; dark red-brown along posterior margin and a broad red-brown medial longitudinal band beginning at anterior margin of scutum and ending at level of mesonotal suture (within this band is a narrow medial longitudinal black line). Pleural area dull black except red-brown below postpronotal lobe. Yellow markings as follows: postpronotal lobe; notopleuron; mesopleural stripe of medium width, reaching midway between anterior margin of notopleuron and anterior npl. seta dorsally, continuing to katepisternum as a transverse spot, anterior margin slightly convex; anatergite (posterior apex black); anterior 2 / 3 katatergite (remainder black); two moderately broad lateral postsutural vittae, narrowing slightly posteriorly to end just before ia. setae. Postnotum black laterally, dark red-brown centrally. Scutellum yellow except for a narrow black basal band. Setae: sc. 2; prsc. 2; ia. 1; p.sa. 1; a.sa. 1; mpl. 1; npl. 2; scp. 4.

Legs. – All segments fulvous except fore tibiae pale fuscous and hind tibiae dark fuscous; mid tibiae each with an apical black spur.

Wings. – Length 6.2 mm; cells bc and c colourless; microtrichia in outer corner of cell c only; remainder of wings colourless except dark fuscous cell sc, narrow dark fuscous costal band slightly overlapping R 2+3 and ending between extremities of R 4+5 and m (the costal band remains dark fuscous over R 2+3 and of uniform width beyond apex of R 2+3); a narrow fuscous to dark fuscous cubital streak; a dense aggregation of microtrichia around A 1 +CuA 2; supernumerary lobe of medium development.

Abdomen. – Oval; terga free; pecten present on tergum III. Tergum I and sterna I and II wider than long. Tergum I dark fuscous except for a narrow transverse orange-brown margin posterocentrally; tergum II orange-brown except for a narrow transverse sub-anterior band that is mostly black except fuscous centrally, and anterolateral corners fuscous; terga III–V orange-brown except for a narrow to medium width medial longitudinal black band, anterolateral corners of tergum III dark fuscous and anterolateral corners of terga IV and V narrowly pale fuscous to fuscous. A pair of oval orange-brown shining spots on tergum V. Posterior lobe of surstylus short, sternum V with a deep concavity on posterior margin.

Attractant. – Cue lure.

Female. – No known record.

Distribution. – Morobe Province, Papua New Guinea.

Hosts. – No known record.

Etymology. – The name rufivitta refers to the red-brown medial longitudinal band on the anterior portion of the scutum.

Remarks. – Bactrocera rufivitta new species has been distinguished through the molecular studies. It is similar to B. brevistriata , B. commina and B. prolixa in possessing the general colour patterns of the musae complex, yellow notopleuron and each lateral postsutural vitta ending before the ia. seta. It is distinct from these species in having a broad dark red-brown medial longitudinal band on the anterior half of the scutum and a narrow cubital streak in the wing.

Figures

Fig. 4. Bactrocera (Bactrocera) rufivitta, new species.