Asiobaccha virtuosa ( Curran, 1928 ), Mengual, Ximo, 2016

Mengual, Ximo, 2016, A taxonomic revision of the genus Asiobaccha Violovitsh (Diptera: Syrphidae), Journal of Natural History 50, pp. 2585-2645: 2634-2641

publication ID

http://doi.org/ 10.1080/00222933.2016.1206634

publication LSID

lsid:zoobank.org:pub:6B627B0F-9440-47F1-90F4-9AF4C7308A99

DOI

http://doi.org/10.5281/zenodo.4333773

persistent identifier

http://treatment.plazi.org/id/B23987DC-FFB7-FFF9-5E36-D01CFB26FA80

treatment provided by

Carolina

scientific name

Asiobaccha virtuosa ( Curran, 1928 )
status

comb. nov.

Asiobaccha virtuosa ( Curran, 1928)   comb. nov.

( Figures 12a, b, d View Figure 12 , 14b View Figure 14 )

Baccha virtuosa Curran, 1928: 246   . Lectotype: ♂, BMNH, here designated. Type locality: Malaysia, Rhododendron Hill. Curran 1931a: 322; Curran 1942: 6; Curran 1947: 5.

Baccha gigas Curran, 1931b: 356   . Syn. nov. Curran 1931a: 322; Curran 1947: 5.

Baccha (Baccha) virtuosa   of Knutson et al. 1975: 323.

Baccha (Allobaccha) gigas   of Knutson et al. 1975: 322.

Asiobaccha virtuosa   of Mengual 2015: 398 (DNA voucher ZFMK_XM224).

Differential diagnosis

This species has the face entirely yellow and the abdomen with yellow markings ( Figure 12a, d View Figure 12 ), the alula partly microtrichose, the wing with partly bare basal cells

( Figure 14b View Figure 14 ), and a well-defined mesonotal collar. It is similar to A. nubilipennis   , but A. virtuosa   has the cell R completely microtrichose and tergum 4 with two subrectangular yellow maculae ( Figures 12a, b View Figure 12 , 14b View Figure 14 ).

Length (N = 3). Body, 11.0 – 14.7 (13.2) mm; wing, 10.5 – 13.0 (11.9) mm.

Geographical distribution

Malay Peninsula, Sumatra and Borneo.

Genetics

The GenBank accession numbers for this species are: 28S gene ( KM 270824 View Materials , specimen ZFMK _ XM224 View Materials ), 18S gene ( KM 270772 View Materials , specimen ZFMK _ XM224 View Materials ), COI gene ( KM 270855 View Materials , specimen ZFMK _ XM224 View Materials )   .

Type locality

Malaysia: Pahang, Cameron ’ s Highlands, Rhododendron Hill , 04°29 ʹ N, 101°22 ʹ E GoogleMaps   .

Material examined

Type material. Lectotype, male, deposited in The Natural History Museum , formerly British Museum (Natural History) (London, United Kingdom), and labelled as indicated below (specimen photographed).  

Type material of Baccha gigas Curran, 1931   . Holotype, female, deposited in The Natural History Museum, formerly British Museum (Natural History) (London, United Kingdom), and labelled: ‘ Holo- // type ’ [round, red margin] ‘ Baccha   // TYPE // gigas   ♀ // Curran. // No. ’ [red] ‘ B.N. BORNEO. // Mt. Kinabalu, // Marei Parei, // 5,000 ft. // 30; 4; 1929. ’ [pink] ‘ H.M. Pendlebury // coll. // F.M.S. Museums. ’ [on the reverse of previous label, italics] ‘ Baccha   // gigas   // Curran. // Det. // C.H. Curran ’ ‘ Pres. by // Fed.Malay States // Museum. // B.M. 1934 – 74. ’.

Nontype material. MALAYSIA: Pahang, Brinchang , 24 November – 2 December 1977, B   . Bendell [1♂, CNC]; Pahang, Cameron ’ s Highlands, G   . Perdah , 5100 ft   ., 30 April 1941, J.A. Reid [1♂, BMNH]; Pahang, Cameron ’ s Highlands, G   . Terbalvar , 4481 ft   ., 19 July 1928, H.M. Pendlebury [1♀, BMNH]; Pahang, Cameron ’ s Highlands, 4000 – 4500 ft   ., 15 June 1935, H.M. Pendlebury [1 sp., BMNH]; Pahang, Fraser ’ s Hill, 4200 ft   ., 22 July 1936, H.M. Pendlebury [1♂ 1♀, BMNH]   ;..., 15 July 1936,... [1♀, BMNH]   ;..., 4000 ft., 5 June 1941,... [1 sp., BMNH]   ;..., 2 July 1931,... [1♂, AMNH]   ;..., 4000 ft., 31 May 1932,... [1♂, AMNH]; Perak, Larut Hills, 4500 ft   ., 22 February 1932, H.M. Pendlebury [1 ♂, USNM, USNM ENT 00890806 View Materials ]   ;..., 3700 – 4500 ft., 14 – 15 February 1932,... [1♂, AMNH]; Sabah, Mt   . Kinabalu, 5000 ft., 1 – 5 May 1973, K.M. Guichard [1♀, BMNH];]; Sabah, Mt   . Kinabalu, Marei Parei , 5000 ft   ., 29 April 1929, H.M. Pendlebury [1♀, CNC]; Sabah, Penampang District, Crocker Range , Gunung Alab , 1660 m, 05°48 ʹ 47 ʹ ’ N, 116°20 ʹ 16 ʹ ’ E, 16 October 2011, M   . Hauser and S   . Gaimari [1♀, CSCA; 1♀, ZFMK, ZFMKDIP 00011954 View Materials ; DNA voucher ZFMK _ XM224 View Materials ]   ;..., Long Gong Kugan , 1630 m, 05°49 ʹ 44 ʹ ’ N, 116°19 ʹ 37 ʹ ’ E, 22 October 2011, M   . Hauser and S   . Gaimari [1♀, ZFMK, ZFMKDIP 00011951 View Materials ]; Long Pa Sia to Long Semado , kerangas, 1485 m, 3 – 5 December 1987, C   .v. Achterberg, Malaise [1♀, RMNH]   . INDONESIA: south Sumatra, SW Lampong district , Mt   . Tanggamoes, 600 – 700 m, December 1939, M.A. Lieftinck [1♀, RMNH]   .

Remarks

Curran (1928) described A. virtuosa   from two males collected the same day by H. M. Pendlebury. In BMNH, there is a pinned male labelled: ‘ Fed. Malay States // Pahang, ‘ Cameron ’ s // Highlands ’ Rhododendron // Hill. 5200 ft. 19.VI.1923. // H. M. Pendlebury ’ ‘ Syn- // type ’ [round, blue margin] ‘Holo TYPE ♂ // Baccha   // virtuosa   // No Curran’ [red] ‘ Brit. Mus. // 1926 – 56. ’ ‘ LECTOTYPE // Asiobaccha   // virtuosa   // de s. X. Mengual 20 14’ [red; second and third lines handwritten]. This specimen is here designated as lectotype to fix and ensure the universal and consistent interpretation of the name.

The holotype of A. virtuosa   has no alula on the right wing and only the basal portion of the alula remains in the left wing.

The holotype female of Baccha gigas   is in poor condition, missing the left wing and most of the abdomen (only terga 1 and 2 remain). The name Baccha gigas   was introduced in the identification key from Curran (1931a, p. 322), and the only difference from Asiobaccha virtuosa   stated by the same author is the colouration of the wing: virtuosa   has wings wholly brown, darker in front, while gigas   has wings dark only in front. The holotype of Baccha gigas Curran   was studied and was found to be the same species as Asiobaccha virtuosa Curran.  

Specimens from the collection at RMNH have a manuscript name given by P.H. van Doesburg, Baccha flavitarsis   , never published; thus, it is not available.

Key to the species of Asiobaccha Violovitsh  

1. Alula broad or reduced but always present ( Figures 1 View Figure 1 , 3a View Figure 3 , 8a View Figure 8 ) .................................... 4

– Alula absent, anal lobe reduced ( Figure 9d View Figure 9 ).......................................................................... 2

2. Cell C almost completely bare, microtrichose on apical 1/5. Face with white pollinosity ( Figure 10f View Figure 10 ). Abdomen dark; tergum 1 dark ( Figure 10a, b View Figure 10 ) (New Guinea) ................................................................................................................... A. selsi Mengual   sp. nov.

– Cell C entirely microtrichose. Face with yellow pollinosity ( Figure 9f View Figure 9 ). Abdomen black with yellow markings on terga 2 and 3, sometimes also on tergum 4 ( Figures 6c View Figure 6 , 9c, d View Figure 9 ); tergum 1 usually yellow, not always.................................................................... 3

3. Pleuron dark: meron, metaepisternum and metacoxa dark brown ( Figure 9d View Figure 9 ). Metatibia yellow-brown ( Figure 9c, d View Figure 9 ). Scutellum unicolor, between yellow-brown to black ( Taiwan, Vietnam, Sulawesi and Luzon).............. .............. A. sauteri (Kertész)  

– Pleuron lighter: meron, metaepisternum and metacoxa yellow ( Figure 6d View Figure 6 ). Metatibia yellow with medial broad, black annulus ( Figure 6c, d View Figure 6 ). Scutellum yellow with medial dark area (Sumatra and Malay Peninsula).......................................................... ............................................................................ A. maculosa Mengual & Thompson   sp. nov.

– [Note: A. maculosa   has a narrow, linear alula but it is absent in all the paratypes; A. sauteri   has no alula. This species is keyed out in couplets 3 and 8]

4. Scutellum yellowish ( Figures 5c View Figure 5 , 10c View Figure 10 ). Abdomen usually with yellow or orange markings ( Figures 5c View Figure 5 , 7a View Figure 7 , 10c View Figure 10 ). Face bright yellow ( Figures 5e View Figure 5 , 8e View Figure 8 ) ............................ 7

– Scutellum and abdomen entirely black ( Figures 3c View Figure 3 , 8c View Figure 8 ). Face variable: black to dark yellow ( Figures 3f View Figure 3 , 8f View Figure 8 )....................................................................................................................... 5

5. Metatarsi yellowish white, except metabasitarsomere dark on basal 1/5 ( Figure 3c, d View Figure 3 ). Alula mostly bare, microtrichose only on anterodistal quarter, narrower than cell BM ( Solomon Islands)..................................... ..................................... A. albipeza Mengual   sp. nov.

– Metatarsi dark, black or dark brown ( Figures 8d View Figure 8 , 9b View Figure 9 ). Alula microtrichose on apical half or more, as broad as or broader than cell BM ............................................................ 6

6. Cell BM bare on basal half or more, cells R and CuP bare basally, costal cell bare on basal half or less ( Vanuatu, New Caledonia, Fiji, Tonga)................ A. praefica (Bezzi)  

– Wing entirely microtrichose except alula bare very basally ( Samoa)............................... ................................................................................................... A. samoaensis Mengual   sp. nov.

7. Scutellum variable, usually entirely yellow or dark brown, never with a medial, round black macula. Tergum 4 different................................................................................. 9

– Scutellum yellow with a medial, isolated dark/black macula surrounded by yellow ( Figure 11a View Figure 11 ). Tergum 4 with two longitudinal yellow vitta reaching anterior margin ( Figure 11a View Figure 11 )........................................................................................................................................... 8

8. Alula broad, broader than costal cell. Tergum 3 with a submedial, triangular yellow fascia, not divided medially ( Figure 11a View Figure 11 ). Male: Frontal triangle densely yellow pollinose dorsally ( Figure 12f View Figure 12 ). Female: frons yellow pollinose on dorsal 3/4 (between anterior ocellus and antennal base), laterally joining pollinosity of face; and ocellar triangle shiny ( Figure 11e View Figure 11 ) (Borneo, Malay Peninsula, Sumatra, Java, Vietnam).................................................................................................. A. tinctiventris (Meijere)  

– Alula narrow, as narrow as or narrower than costal cell ( Figure 6c View Figure 6 ). Tergum 3 with two broad yellow maculae, not medially joined ( Figure 6c View Figure 6 ). Male: Frontal triangle shiny, not pollinose ( Figure 6f View Figure 6 ). Female: frons yellow pollinose only on dorsal 1/2 or less (between anterior ocellus and antennal base), isolated from facial pollinosity; and ocellar triangle pollinose ( Figure 12e View Figure 12 ) (Sumatra and Malay Peninsula)................. ............................................................................ A. maculosa Mengual & Thompson   sp. nov.

9. Mesonotal fringe or collar absent on anterior part of scutum ( Figures 4d View Figure 4 , 10e View Figure 10 ). Alula narrower than costal cell, at most as broad as costal cell ( Figure 14c, d View Figure 14 ) ............. 17

– Mesonotal fringe or collar well-defined on anterior part of scutum ( Figures 3b View Figure 3 , 4b View Figure 4 ). Alula usually broader than costal cell in the apical part ( Figure 14a, b View Figure 14 ) ................ 10 [NOTE: A. tinctiventris   has no mesonotal collar but alula broader than costal cell. This species is keyed out in couplets 7 and 8]

10. Wing entirely microtrichose, except alula bare on posterior margin ( Figure 3a, b View Figure 3 ) ( Solomon Islands).................................................... A. aea Mengual & Thompson   sp. nov. – Wing bare basomedially; cell BM bare basally ( Figures 4a View Figure 4 , 5c View Figure 5 )................................... 11

11. Abdominal tergum 1 black or brownish, sometimes yellowish on lateral margins ( Figure 4a View Figure 4 ); tergum 2 black with two pairs of yellow maculae: one basally, which may join medially, and another medially; tergum 3 with two triangular maculae or with a broad yellow fascia not reaching anterior margin ( Figures 4a View Figure 4 , 8a View Figure 8 )............. 14

– Abdominal tergum 1 yellow with or without narrow dark fascia on posterior margin ( Figure 12a View Figure 12 ); tergum 2 yellowish, brownish posteriorly, with a dorsomedial brownish macula; tergum 3 with broad yellow fasciate maculae reaching anterior margin ( Figures 5c, d View Figure 5 , 7c View Figure 7 )............................................................................................................. 12 [Note: A. virtuosa   does not totally comply with any options of the couplet 11, as it has tergum 1 yellow, but yellow macula on tergum 3 does not reach anterior margin. For this reason, it appears twice in the key]

12. Cell R entirely microtrichose posterior to spurious vein ( Figure 14b View Figure 14 ). Tergum 4 with two subtriangular/rectangular yellow maculae, isolated from anterior margin ( Figure 12a, b View Figure 12 )............................................... ............................................... A. virtuosa (Curran)  

– Cell R bare basally, posterior to spurious vein. Tergum 4 black, or with yellow markings reaching anterior margin ( Figures 5d View Figure 5 , 7c View Figure 7 ) ........................................................ 13

13. Abdominal tergum 4 black, sometimes with two diffuse round yellow maculae on anterior margin; tergum 5 black ( Figure 5c, d View Figure 5 ). Stigma brown, not contrasting with colouration of subcostal cell or cell R1 ( Figure 5d View Figure 5 ) (New Guinea).................................... ....................................................................................................... A. doesburgi Mengual   sp. nov.

– Abdominal tergum 4 black with a broad yellow fascia on anterior 1/2, slightly emarginated medially on posterior margin; tergum 5 black with two basal elongate yellow maculae on anterior margin ( Figure 7c, d View Figure 7 ). Stigma darker, contrasting with subcostal cell and cell R1 ( Figure 7c View Figure 7 ) ( Australia)....................................................................... ..................................................................... A. notofasciata Thompson & Mengual   sp. nov.

14. Abdominal tergum 4 black with two subtriangular/rectangular yellow maculae, broadening laterally and not reaching the lateral margin, on basal half of the tergum ( Figure 12a View Figure 12 ); golden yellow pollinosity on posterior anepisternum, katepisternum and katatergum; cell R entirely microtrichose posterior to spurious vein ( Figure 14b View Figure 14 ) (Malay Peninsula, Sumatra and Borneo).................. A. virtuosa (Curran)  

– Abdominal tergum 4 black, at most with two round very small yellow maculae on the anterolateral margin of the tergum ( Figures 4a View Figure 4 , 8a View Figure 8 , 12c View Figure 12 ); white or golden pollinosity on posterior anepisternum, katepisternum and katatergum; cell R bare on basal 1/3 or more, posterior to spurious vein ( Figure 14a View Figure 14 ).................................... 15 [NOTE: Some specimens of A. nubilipennis   from Sumatra have the cell R almost entirely microtrichose, although they have tergum 4 black and key out to couplet 16]

15. Metatarsus entirely black; scutellum black, sometimes posterior margin tawny ( Figure 4a, b View Figure 4 ) ( Philippines)............................ A. aquila Thompson & Mengual   sp. nov.

– Metatarsus pale (white-yellow), except metabasitarsomere black on basal 2/3; scutellum yellow-brown ( Figures 5a View Figure 5 , 8b View Figure 8 ) .............................................................................. 16

16. Abdominal tergum 3 with two medial subtriangular yellow maculae, pointing anteriorly and not reaching lateral margins; metafemur mostly dark brown; pleuron with yellow golden pollinosity ( Figure 5a, b View Figure 5 ) (Sumba).......... A. bimaculata (Keiser)  

– Abdominal tergum 3 with medial broad yellow fascia (about 1/3 to 1/2 of tergum length) reaching lateral margins, sometimes also with two laterobasal small yellow maculae ( Figures 8a View Figure 8 , 12c View Figure 12 ); metafemur yellow with medial dark annulus ( Figure 8b View Figure 8 ); pleuron with white or yellow pollinosity (widely spread: from Sri Lanka, India to Japan, south to Indonesia).............................................................. A. nubilipennis (Austen)  

17. Scutum, scutellum, pleuron and legs yellowish orange; abdomen mostly yellowish orange basally ( Figure 10c View Figure 10 ). Male genitalia large, with epandrium and hypandrium enclosed under sternum 4 ( Figure 10d View Figure 10 ) ( Solomon Islands)................................................. ............................................................................................................ A. taronja Mengual   sp. nov.

– Scutum darker dorsally, scutellum yellowish ( Figure 11c View Figure 11 ), pleuron yellow with two black vittae (from dorsomedial anepimeron to mesocoxa and on metaepisternum) and legs partly yellow ( Figure 7b View Figure 7 ). Male genitalia small, epandrium and hypandrium exposed and not covered by sternum 4 ................................................................. 18

18. Abdominal tergum 4 black on posterior 2/5 with yellow fascia on anterior 3/5, emarginate posteromedially and broadening laterally ( Figure 7a View Figure 7 ); antennal base with lateral lobular expansions on each side ( Figure 1 View Figure 1 ) (Sulawesi).................................. ......................................................................................................... A. marissae Mengual   sp. nov.

– Abdominal tergum 4 entirely black, sometimes with purple gloss ( Figures 6a View Figure 6 , 11c View Figure 11 ); antennal base normal, without lateral expansions ........................................................... 19

19. Wing entirely microtrichose: cell BM microtrichose; anal lobe and cell CuP microtrichose ( Figure 6a View Figure 6 ); alula mostly bare (New Guinea, Sumbawa and Luzon)............... ................................................................................................................................. A. loriae (Meijere)  

– Wing bare basomedially: cell BM bare on basal 1/5 or more; cell CuP and anal lobe bare basally ( Figures 11c View Figure 11 , 14c, d View Figure 14 ); alula mostly bare........................................................ 20

20. Cell R entirely microtrichose; cell BM bare on basal 1/3 – 1/2 ( Figures 11c View Figure 11 , 14d View Figure 14 ) (Kai Islands, Misool, New Guinea, New Ireland, and Woodlark islands)................................... ........................................................................................................................... A. tripartita (Walker)  

– Cell R bare on basal 1/3 – 1/2; cell BM bare on basal 1/2 or more ( Figures 4c View Figure 4 , 14c View Figure 14 ) ( Moluccas (Maluku and North Maluku Provinces), New Guinea, New Ireland, and Australia)............................................................................................................ A. bicolor (Austen)  

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

CNC

Canadian National Collection of Insects, Arachnids, and Nematodes

AMNH

American Museum of Natural History

USNM

Smithsonian Institution, National Museum of Natural History

CSCA

California State Collection of Arthropods

RMNH

National Museum of Natural History, Naturalis

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Diptera (awaiting allocation)

Genus

Asiobaccha

Loc

Asiobaccha virtuosa ( Curran, 1928 )

Mengual, Ximo 2016
2016
Loc

Asiobaccha virtuosa

Mengual X 2015: 398
2015
Loc

Baccha (Baccha) virtuosa

Knutson LV & Thompson FC & Vockeroth JR 1975: 323
1975
Loc

Baccha (Allobaccha) gigas

Knutson LV & Thompson FC & Vockeroth JR 1975: 322
1975
Loc

Baccha gigas

Curran CH 1947: 5
Curran CH 1931: 356
Curran CH 1931: 322
1931
Loc

Baccha virtuosa

Curran CH 1947: 5
Curran CH 1942: 6
Curran CH 1931: 322
Curran CH 1928: 246
1928