Taxonomy
Valid name: Bactrocera (Bactrocera) quadrisetosa (Bezzi, 1928)
Preferred common name: None
Synonyms:
Chaetodacus quadrisetosus (original combination in Bezzi, 1928)
Zeugodacus quadrisetosus (subsequent combination in Perkins, 1937)
Dacus quadrisetosus (subsequent combination in Drew, 1971)
Dacus varipes Malloch, 1939 (junior synonym)
Bactrocera varipes (subsequent combination in Drew, 1989Drew, 1989:
Drew RAI, 1989. The tropical fruit flies (Diptera: Tephritidae: Dacinae) of the Australasian and Oceanian regions. Memoirs of the Queensland Museum 1: 1–521.)
Valid name: Bactrocera (Bactrocera) quasiinfulata Drew & Romig, 2013
Preferred common name: None
Synonyms: None
COI sequence data suggest that B. quadrisetosa is very closely related to - and possibly synonymous with - B. quasiinfulata. The two are also highly similar in morphology, warranting further taxonomic study.
Morphology-based identification
Bactrocera quadrisetosa can be identified reliably based on morphology. It differs from
B. quasiinfulata in the extent of the black markings on the femurs. Spot characters for both are the costal band that extends to vein R4+5, mostly black tergites 3–5, and black front and mid femurs.
Molecular identification
COI sequence data can be used to identify
B. quadrisetosa, it is a close sister to
B. quasiinfulata (
Doorenweerd et al. 2024Doorenweerd et al. 2024:
Doorenweerd C, San Jose M, Leblanc L, Barr N, Geib SM, Chung AYC, Dupuis JR, Ekayanti A, Fiegalan E, Hemachandra KS, Hossain MA, Huang C, Hsu Y, Morris KY, Maryani A. Mustapeng A, Niogret J, Pham TH, Thi Nguyen N, Sirisena UGAI, Todd T, Rubinoff D, 2024. Towards a better future for DNA barcoding: Evaluating monophyly‐ and distance‐based species identification using COI gene fragments of Dacini fruit flies. Molecular Ecology Resources 24: e13987. https://doi.org/10.1111/1755-0998.13987).
Distribution
Bactrocera quadrisetosa is only known from Vanuatu and the Solomon Islands. This is its presumed native range - but this assessment may be revisited depending on the possible taxonomic confusion with
B. quasiinfulata.
Bactrocera quasiinfulata has been recorded from Vietnam, China, Malaysia (Borneo), and Laos (
Doorenweerd et al. 2024Doorenweerd et al. 2024:
Doorenweerd C, San Jose M, Leblanc L, Barr N, Geib SM, Chung AYC, Dupuis JR, Ekayanti A, Fiegalan E, Hemachandra KS, Hossain MA, Huang C, Hsu Y, Morris KY, Maryani A. Mustapeng A, Niogret J, Pham TH, Thi Nguyen N, Sirisena UGAI, Todd T, Rubinoff D, 2024. Towards a better future for DNA barcoding: Evaluating monophyly‐ and distance‐based species identification using COI gene fragments of Dacini fruit flies. Molecular Ecology Resources 24: e13987. https://doi.org/10.1111/1755-0998.13987).
Further information
Bactrocera quadrisetosa is reported as a "category D" pest of
Pometia pinnata in
Vargas et al. 2015Vargas et al. 2015:
Vargas RI, Pinero JC, Leblanc L, 2015. An overview of pest species of Bactrocera fruit flies (Diptera: Tephritidae) and the integration of biopesticides with other biological approaches for their management with a focus on the pacific region. Insects 6: 297–318. https://doi.org/10.3390/insects6020297. A category D pest is there defined as "species that have been occasionally bred from commercial/edible fruit or cucurbits".
