Zeugodacus (Javadacus) tau ( Walker, 1849 )

Leblanc, Luc, Hossain, M. Aftab, Momen, Mahfuza & Seheli, Kajla, 2021, New country records, annotated checklist and key to the dacine fruit flies (Diptera: Tephritidae: Dacinae: Dacini) of Bangladesh, Insecta Mundi 2021 (880), pp. 1-56 : 45-52

publication ID

https://doi.org/ 10.5281/zenodo.5352282

publication LSID

lsid:zoobank.org:pub:A6DE8E5B-98F9-4F31-BE36-E84EC1DB596F

persistent identifier

https://treatment.plazi.org/id/03C487CC-7368-FFEF-FF47-1D70A782FE0D

treatment provided by

Marcus

scientific name

Zeugodacus (Javadacus) tau ( Walker, 1849 )
status

 

Zeugodacus (Javadacus) tau ( Walker, 1849) View in CoL

(= Dacus hageni Meijere, 1911 , Dacus nubilus femoralis Hendel, 1934 , Dacus elegantis Tseng, Chen and Chu, 1992 , Dacus flavus Tseng, Chen and Chu, 1992 )

Figure 35 View Figure 35

Distribution. Widespread in tropical Asia, from India and Sri Lanka to Vietnam and Taiwan, and south to Indonesia ( Drew and Romig 2013), Cambodia, Laos ( Leblanc et al. 2016), Nepal ( Sharma et al. 2015), Bangladesh ( Kabir et al. 1991).

Bangladesh records. 21,185 specimens. BARISHAL DIVISION: Barguna, Barishal, Bhola, Jhalokathi, Patuakhali, and Pirojpur Districts. CHATTOGRAM DIVISION: Bandarban Hill, Bramhanbaria, Chandpur, Chattogram, Cox’s Bazar, Cumilla, Feni, Khagrachari Hill, Laxmipur, Noakhali, and Rangamati Hill Districts. DHAKA DIVI- SION: Dhaka, Faridpur, Gazipur, Gopalgonj, Kishorgonj, Madaripur, Manikganj, Munshiganj, Narayanganj, Narsingdi, Rajbari, Shariatpur, and Tangail Districts. KHULNA DIVISION: Bagerhat, Chuadanga, Jashore, Jhenaidah, Kushtia, Magura, Meherpur, Narail, and Satkhira Districts. MYMENSINGH DIVISION: Jamalpur, Mymensingh, Netrokona, and Sherpur Districts. RAJSHAHI DIVISION: Bogura, Chapai Nawabgonj, Joypurhat, Naogaon, Natore, Pabna, Rajshahi, and Sirajgonj Districts. RANGPUR DIVISION: Dinajpur, Gaibandha, Kurigram, Lalmonirhat, Nilphamari, Panchagarh, Rangpur, and Thakurgaon Districts. SYLHET DIVISION:Habiganj, Moulvibazar, Sunamgonj, and Sylhet Districts.

Male lure. Cue-lure.

Host plants. Primarily a pest of cucurbit fruits, though its host range is much broader, as it has been bred from 77 host taxa in 44 genera and 23 families ( Liquido et al. 2016a). Hosts in Bangladesh include: winter melon ( Benincasa hispida (Thunb.) Cogn. ), melon ( Cucumis melo L.), cucumber ( C. sativus L.), pumpkin ( Cucurbita pepo L.), calabash ( Lagenaria siceraria (Molina) Strandl. ), angled luffa ( Luffa acutangula (L.) Roxb.), smooth luffa ( L. cylindrica (L.) M.Roem.), bittergourd ( Mormodica charantia L.), gac fruit ( M. cochinchinensis (Lour.) Spreng. ), spiny gourd ( M. dioica Roxb. Ex Willd. ), and snakegourd ( Trichosanthes cucumerina L.) (all Cucurbitaceae ) ( Kabir et al. 1991; Akhtaruzzaman et al. 1999a; Huque 2006).

Notes. In Bangladesh, Hossain et al. (2019) studied the seasonal abundance of Z. tau to develop a control strategy. Chowdhury et al. (1993) initiated a melon fly and pumpkin fly control strategy in bitter gourd field using poison bait. Akhtaruzzaman et al. (1999b) initiated bagging method in cucumber to prevent pumpkin fly infestation. The detailed life history of this species in Bangladesh was published by Kabir et al. (1997).

Key to the species of dacine fruit flies recorded in Bangladesh

1. Large wasp-like red-brown fly (wing at least 8 mm long) with abdominal base of syntergite 1+2 longer than broad ( Fig. 23C View Figure 23 ) and wing costal band very broadly overlapping vein R 4+5 ( Fig. 23D View Figure 23 )....... 2

— Smaller fly (wing less than 8 mm long) with abdominal base of syntergite 1+2 broader than long ( Fig. 25C View Figure 25 ) and wing costal band narrower, at most reaching vein R 4+5 ( Fig. 10D View Figure 10 ).................... 3

2. Face fulvous with two small oval black spots; males attracted to cue-lure; ( Fig. 23 View Figure 23 )................................................................. Dacus (Callantra) longicornis Wiedemann View in CoL

— Face reddish brown with a large inverted U-shaped black marking; males attracted to cue-lure; ( Fig. 22 View Figure 22 ).............................................. Dacus (Mellesis) jacobi David and Sachin View in CoL

3(1). Scutum with yellow median postsutural vitta ( Fig. 29C View Figure 29 ), though sometimes very reduced ( Fig. 28B).. 4

— Scutum without yellow median postsutural vitta............................................ 13

4(3). Wing with infuscations present along r-m and dm-cu crossveins, in addition to the costal band and anal streak; males attracted to cue-lure; ( Fig. 28)..... Zeugodacus (Javadacus) cucurbitae (Coquillett) View in CoL

— Wing with infuscations restricted to the costal band and anal streak ( Fig. 29F View Figure 29 )................... 5

5(4). Apex of costal band on wing greatly expanded into an enlarged circular spot ( Fig. 31E View Figure 31 )............ 6

— Apex of costal band on wing not so greatly expanded ( Fig. 35C View Figure 35 )................................ 9

6(5). Lateral postsutural vitta absent or at most very short and narrow males attracted to cue-lure; ( Fig. 31 View Figure 31 )...................................................... Zeugodacus (Sinodacus) hochii (Zia)

— Lateral postsutural vitta well developed ( Fig. 34B View Figure 34 )............................................ 7

7(6). Wing membrane with a fulvous tinge, in addition to fuscous costal band and anal streak; males attracted to cue-lure; ( Fig. 34 View Figure 34 ).......... Zeugodacus (Sinodacus) madhupuri Leblanc and Doorenweerd

— Wing membrane nearly hyaline, other than fuscous costal band and anal streak.................. 8

8(7). Anterior supra-alar seta present; costal band complete, not interrupted beyond the apex of vein R 2+3; males attracted to cue-lure; ( Fig. 33 View Figure 33 )............. Zeugodacus (Sinodacus) infestus (Enderlein)

— Anterior supra-alar seta absent; costal band interrupted between the apex of vein R 2+3 and the large apical spot; males attracted to cue-lure; ( Fig. 24 View Figure 24 ).......... Zeugodacus (Asiadacus) apicalis (Meijere)

9(5). Face fulvous with a pair of circular to oval black spots ( Fig. 35A View Figure 35 ); apex of wing costal band expanded into an apical spot; males attracted to cue-lure; ( Fig. 35 View Figure 35 )...... Zeugodacus (Javadacus) tau (Walker) View in CoL

— Face either uniformly black ( Fig. 29A View Figure 29 ), or fulvous, with ( Fig. 30A View Figure 30 ) or without ( Fig. 30B View Figure 30 ) a transverse black band; apex of wing costal band at most slightly expanded ( Fig. 30F View Figure 30 )................... 10

10(9). Face entirely black ( Fig. 29A View Figure 29 ); femora basally fulvous and apically dark fuscous to black ( Fig. 29H View Figure 29 ).. 11

— Face fulvous, with ( Fig. 30A View Figure 30 ) or without ( Fig. 30B View Figure 30 ) a transverse dark band; femora mostly or entirely fulvous ( Fig. 30I View Figure 30 ).................................................................... 12

11(10). Scutellum with one pair of setae; males attracted to cue-lure; ( Fig. 29 View Figure 29 )......................................................................... Zeugodacus (Zeugodacus) diaphorus (Hendel)

— Scutellum with two pairs of setae; males attracted to cue-lure; ( Fig. 25 View Figure 25 ).......................................................................... Zeugodacus (Zeugodacus) atrifacies Perkins View in CoL

12(10). Face entirely fulvous in male ( Fig. 30B View Figure 30 ), fulvous with transverse dark band across oral margin in female ( Fig. 30A View Figure 30 ); scutellum with one pair of setae (rarely two pairs in male); male abdomen without pecten ( Fig. 30E View Figure 30 ); males weakly attracted to methyl eugenol and zingerone, and strongly attracted to methyl-isoeugenol; ( Fig. 30 View Figure 30 ).................. Zeugodacus (Zeugodacus) diversus (Coquillett)

— Face entirely fulvous with transverse dark band across oral margin in both sexes ( Fig. 26A View Figure 26 ); scutellum with two pairs of setae; male abdomen with pecten ( Fig. 26D View Figure 26 ); males attracted to cue-lure; ( Fig. 26 View Figure 26 )........................................ Zeugodacus (Zeugodacus) caudatus (Fabricius)

13(3). Costal band interrupted ( Fig. 20D View Figure 20 ) or drastically narrowed ( Fig. 27E View Figure 27 ) before reaching its apex..... 14

— Costal band not interrupted before reaching its apex ( Fig. 32E View Figure 32 )................................ 17

14(13). Scutum and abdomen red-brown; males attracted to methyl eugenol; ( Fig. 20 View Figure 20 ).................................................................... Bactrocera (Bactrocera) zonata (Saunders) View in CoL

— Scutum predominantly to entirely black; abdomen black or predominantly red-brown........... 15

15(14). Abdomen red-brown with a dark T-shaped pattern on terga III–V ( Fig. 5C View Figure 5 ); males attracted to methyl eugenol; ( Fig. 5 View Figure 5 ).................................. Bactrocera (Bactrocera) correcta (Bezzi) View in CoL

— Abdomen predominantly or entirely black.................................................. 16

16(15). Legs entirely fulvous ( Fig. 19H View Figure 19 ); face fulvous with a pair of oval black spots ( Fig. 19A View Figure 19 ); males attracted to methyl eugenol; ( Fig. 19 View Figure 19 )........................ Bactrocera (Bactrocera) tuberculata (Bezzi) View in CoL

— Fore femur black and mid and hind femora basally fulvous and apically black ( Fig. 27F View Figure 27 ); face fulvous with two parallel transverse black bands, across oral margin and below antennal sockets ( Fig. 27A View Figure 27 ); males attracted to cue-lure; ( Fig. 27 View Figure 27 ).............. Zeugodacus (Parasinodacus) cilifer (Hendel)

17(13). Yellow lateral postsutural vitta absent ( Fig. 21B View Figure 21 ); scutum and abdomen predominantly red-brown ( Fig. 21B View Figure 21 ); abdomen with tergites fused into a single plate; no known male lure; ( Fig. 21 View Figure 21 )....................................................................... Dacus (Didacus) ciliatus Loew View in CoL

— Yellow lateral postsutural vitta present ( Fig. 10B View Figure 10 ), though sometimes very short; scutum and abdomen color variable; abdomen with tergites not fused......................................... 18

18(17). Costal band very broad and confluent with vein R 4+5 ( Fig. 10D View Figure 10 )............................... 19

— Costal band narrower, at most overlapping vein R 2+3 but never reaching vein R 4+5 ( Fig. 17D View Figure 17 )....... 20

19(18). Scutellum with one pair of setae; abdominal sternum V with a deep concavity on posterior margin in male; apex of aculeus of ovipositor needle-like in female; males attracted to cue-lure; ( Fig. 10 View Figure 10 ).................................................... Bactrocera (Bactrocera) limbifera (Bezzi) View in CoL

— Scutellum with two pairs of setae; abdominal sternum V with a slight concavity on posterior margin in male; apex of aculeus of ovipositor trilobed (needle-like with two subapical teeth) in female; no known male lure; ( Fig. 11 View Figure 11 )............ Bactrocera (Paratridacus) melania (Hardy and Adachi)

20(18). Scutellum yellow with a broad medial longitudinal black stripe, with two pairs of setae; males attracted to zingerone; ( Fig. 1 View Figure 1 )...................... Bactrocera (Parazeugodacus) abbreviata (Hardy) View in CoL

— Scutellum entirely yellow, with one or two pairs of setae...................................... 21

21(20). Fore and middle femora apically or entirely black; apex of hind femur black; abdomen predominantly or mostly black........................................................................ 22

— Femora fulvous or red-brown with at most a dark anterior subapical dorsal spot on fore femur ( Fig. 4E View Figure 4 ); abdomen pale colored, sometimes with broad lateral black markings....................... 26

22(21). Scutellum with two pairs of setae; lateral postsutural vitta very short; males attracted to zingerone; ( Fig. 15 View Figure 15 ).................................... Bactrocera (Parazeugodacus) pendleburyi (Perkins) View in CoL

— Scutellum with one pair of setae; lateral postsutural vitta short or well developed................ 23

23(22). Lateral postsutural vitta very short ( Fig. 14B View Figure 14 ); anepisternal yellow stripe reaching to anterior notopleural seta dorsally ( Fig. 14F View Figure 14 ); males attracted to cue-lure; ( Fig. 14 View Figure 14 ).................................................................. Bactrocera (Bactrocera) nigrofemoralis White and Tsuruta View in CoL

— Lateral postsutural vitta well developed and ending at level of intra-alar seta; anepisternal yellow stripe not reaching to anterior notopleural seta dorsally........................................ 24

24(23). Scutum with yellow spot anterior to transverse suture ( Fig. 32B View Figure 32 ); prescutellar acrostichal seta absent; males attracted to cue-lure; ( Fig. 32 View Figure 32 )............ Zeugodacus (Parasinodacus) incisus (Walker)

— Scutum without yellow spot anterior to transverse suture; prescutellar acrostichal seta present..... 25

25(24). Face fulvous with a black band across oral margin ( Fig. 13A View Figure 13 ); abdominal terga entirely black ( Fig. 13C View Figure 13 ); males attracted to cue-lure; ( Fig. 13 View Figure 13 )...... Bactrocera (Bactrocera) nigrifemorata Lin and Wang

— Face black ( Fig. 12A View Figure 12 ) or dark fuscous with a pair of large oval dark spots; abdomen black with orangebrown medially on terga III-V ( Fig. 12C View Figure 12 ); males attracted to cue-lure; ( Fig. 12 View Figure 12 )..................................................... Bactrocera (Bactrocera) nigrifacia Zhang, Ji and Chen

26(21). Abdomen orange-brown, without a T-shaped dark pattern ( Fig. 9C View Figure 9 ); apex of wing costal band expanded ( Fig. 9D View Figure 9 ); males attracted to latilure; ( Fig. 9 View Figure 9 )........ Bactrocera (Bactrocera) latifrons (Hendel) View in CoL

— Abdomen with a T-shaped pattern, with or without extensive lateral dark markings; apex of costal band not as expanded ( Fig. 17D View Figure 17 )........................................................... 27

27(26). Anterior supra-alar seta (on scutum between wing attachment and yellow lateral postsutural vitta) and prescutellar acrostichal seta absent; scutum and abdomen predominantly orange-brown, abdomen with a very narrow dark T-shaped pattern ( Fig. 6C View Figure 6 ); femora predominantly red-brown; males attracted to cue-lure and zingerone; ( Fig. 6 View Figure 6 )...... Bactrocera (Daculus) digressa Radhakrishnan View in CoL

— Anterior supra-alar seta and prescutellar acrostichal seta present; scutum color variable and abdomen with a T-shaped pattern, with medial stripe narrow ( Fig. 17C View Figure 17 ) to broad ( Fig. 16C View Figure 16 ); femora fulvous with at most small anterior subapical dorsal spot on fore femur............................ 28

28(27). Anepisternal yellow stripe very broad, extended anteriorly and reaching anterior notopleural seta dorsally ( Fig. 2E View Figure 2 ); males attracted to methyl eugenol; ( Fig. 2 View Figure 2 )................................................................................. Bactrocera (Bactrocera) aethriobasis (Hardy) View in CoL

— Anepisternal yellow stripe narrower, not reaching anterior notopleural seta dorsally ( Fig. 17E View Figure 17 ).... 29

29(28). Scutum uniformly red-brown with at most a faint lanceolate pattern ( Fig. 17B View Figure 17 ); abdomen red-brown with a faint or incomplete T-shaped pattern with the medial stripe very narrow ( Fig. 17C View Figure 17 ); wing costal band confluent with or faintly overlapping vein R 2+3 and slightly expanded apically ( Fig. 17D View Figure 17 ); males attracted to cue-lure; ( Fig. 17 View Figure 17 )....... Bactrocera (Bactrocera) rubigina (Wang and Zhao) View in CoL

— Scutum color highly variable, from predominantly orange-brown to predominantly or entirely black; abdomen orange-brown with a usually well-defined T-shaped pattern with the medial stripe usually broader, with limited to extensive lateral black markings; wing costal band confluent with or faintly overlapping vein R 2+3 and slightly to moderately expanded apically ( Fig. 4D View Figure 4 ), or confluent with vein R 2+3 and not expanded apically ( Fig. 8A View Figure 8 )................................................ 30

30(29). Scutum entirely black, without orange-brown markings ( Fig. 18B View Figure 18 ); abdomen terga III-V with very broad black lateral markings ( Fig. 18C View Figure 18 ); males attracted to zingerone; ( Fig. 18 View Figure 18 )............................................................... Bactrocera (Bactrocera) syzygii White and Tsuruta View in CoL

— Scutum varies from predominantly orange-brown to predominantly or entirely black, with limited orange-brown markings; abdomen terga III-V largely orange-brown, with reduced black lateral markings.......................................................................... 31

31(30). Wing costal band faintly overlapping vein R 2+3 and slightly expanded beyond apex of vein R 2+3 ( Fig. 4D View Figure 4 ); fore femur usually with a dark fuscous to black anterior subapical dorsal spot ( Fig. 4E View Figure 4 ); abdomen tergum IV with rectangular lateral black bands along its base ( Fig. 4C, E View Figure 4 ); males attracted to methyl eugenol; ( Fig. 4 View Figure 4 ).................... Bactrocera (Bactrocera) carambolae Drew and Hancock View in CoL

— Wing costal band confluent with or faintly overlapping vein R 2+3, with or without apical expansion; fore femur with or without an anterior subapical dorsal spot; abdomen usually not as above, if with basolateral bands on tergum IV then scutum with parallel longitudinal red-brown medial vittae ( Fig. 3B View Figure 3 ).. .... ... .... .... .... .... .... .... ... .... .... .... .... .... ... .... .... .... .... ..... 32

32(31). Wing costal band confluent with vein R 2+3 vein, and not expanded or at most very slightly expanded apically ( Fig. 8A View Figure 8 ); scutum color pattern highly variable, from almost entirely black to black with variable lanceolate orange-brown pattern to entirely orange-brown ( Fig. 7E–L View Figure 7 ); abdomen with a T-shaped pattern with medial stripe narrow, and limited to extensive lateral dark markings ( Fig. 7C, D, M–Q View Figure 7 ); males attracted to methyl eugenol; ( Fig. 7–8 View Figure 7 View Figure 8 )......... Bactrocera (Bactrocera) dorsalis (Hendel) View in CoL

— Wing costal band at least faintly overlapping vein R 2+3, appearing as a faint tinge below the vein, and expanded apically ( Fig. 3D View Figure 3 , 16D View Figure 16 ); scutum color pattern as in Fig. 3B View Figure 3 or 16B; abdomen with a T-shaped pattern with medial stripe broader and with generally limited lateral dark markings ( Fig. 3C View Figure 3 , 16C View Figure 16 )........................................................................... 33

33(32). Scutum black medially and orange-brown laterally ( Fig. 16B View Figure 16 ); femora fulvous with a faint dark anterior subapical dorsal spot on fore femur; males attracted to cue-lure; ( Fig. 16 View Figure 16 )......................................................... Bactrocera (Bactrocera) propinqua (Hardy and Adachi) View in CoL

— Scutum orange-brown with one narrow medial and two narrow lateral black stripes connected near apex of scutum ( Fig. 3B View Figure 3 ); femora entirely fulvous; males attracted to methyl eugenol; ( Fig. 3 View Figure 3 )......................................................... Bactrocera (Bactrocera) bhutaniae (Hardy) View in CoL

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Tephritidae

Genus

Zeugodacus

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