Asiobaccha tinctiventris ( de Meijere, 1924 ) Mengual, Ximo, 2016

Mengual, Ximo, 2016, A taxonomic revision of the genus Asiobaccha Violovitsh (Diptera: Syrphidae), Journal of Natural History 50, pp. 2585-2645 : 2629-2632

Asiobaccha tinctiventris ( de Meijere, 1924) comb. nov.

( Figures 11a, b, e , 12f )

Baccha tinctiventris de Meijere, 1924: 21 . Holotype: ♀, RMNH. Type locality: Indonesia: Sumatra, Aur Kumanis. Curran 1931a: 322; Curran 1947: 5.

Baccha luteolimbata de Meijere, 1924: 22 . Syn. nov. Curran 1931a: 322; Curran 1947: 5.

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

Baccha (Allobaccha) tinctiventris of Knutson et al. 1975: 323.

Allobaccha luteolimbata of de Jong 2000: 126.

Allobaccha tinctiventris of de Jong 2000: 214.

Differential diagnosis

Species with the face entirely yellow, densely yellow pollinose, and the frons with a medial dark macula on lunule, and very pollinose laterally and posteriorly ( Figures 11e , 12f ). The abdomen is very petiolate, with tergum 3 broadening considerably ( Figure 11a, b ). This species is similar to A. maculosa , but differs in the following characters: the alula is broad, broader than the costal cell; frons and face are densely pale pollinose; the ocellar triangle is shiny; the metatibia is mostly black, yellow only basally; and tergum 3 has yellow markings (a single medial, triangular yellow fascia that is not divided medially).

Length (N = 3). Body, 11.5 – 16.0 (14.0) mm; wing, 10.0 – 15.0 (12.5) mm.

Geographical distribution

Borneo, Malay Peninsula, Sumatra, Java, Vietnam.

Type locality

Indonesia: Sumatra, Aur Kumanis, unknown coordinates ( de Jong 2000) .

Material examined

Type material. Holotype, female, deposited in the Naturalis Biodiversity Center (Leiden, The Netherlands) and labelled: ‘ Edw. Jacobson // Aur Kumanis // Sum. 3 1914 ’ ‘ Baccha // tinctiventris // det. de Meijere. // Type’ [handwritten except third line, de Meijere] ‘ Baccha // tinctiventris // de Meijere, 1924 // ZMAN type DIPT.1060.1 ’ [red] ‘ HOLOTYPE // Asiobaccha // tinctiventris // det. X. Mengual 20 14’ [red] (specimen photographed).

Type material of Baccha luteolimbata de Meijere, 1924 . Lectotype, male, deposited in the Naturalis Biodiversity Center (Leiden, The Netherlands) and labelled: ‘ Edw. Jacobson // Aur Kumanis // Sum. 3 1914 ’ ‘ Baccha // luteolimbata // det. de Meijere. // Type’ [handwritten except third line, de Meijere] ‘ Baccha // luteolimbata // de Meijere, 1924 // ZMAN type DIPT.1015.1 ’ [red] ‘ LECTOTYPE // Baccha // luteolimbata // de s. X. Mengual 20 14’ [red] (specimen photographed). This specimen is here designated as lectotype to fix and ensure the universal and consistent interpretation of the name. Paralectotype, female, deposited in the Naturalis Biodiversity Center (Leiden, The Netherlands) and labelled: ‘ Edw. Jacobson // Aur Kumanis // Sum. 3 1914 ’ ‘ Baccha // luteolimbata // de Meijere, 1924 // ZMAN type DIPT.1015.2 ’ [red] ‘ PARALECTOTYPE // Baccha // luteolimbata // de s. X. Mengual 20 14’ [yellow]. This specimen is here designated as paralectotype.

Nontype material. INDONESIA: south Sumatra, SW Lampong distr. (= Lampung), Mt. Tanggamoes (= Tanggamus), Gisting ult., 600 – 700 m, December 1939, M.A. Lieftinck [1♂, RMNH]; East Borneo, Manjapoe, 18 June 1937 [1♀, BMNH]; Java, Penandjoeng peninsula, 3300 m, July 1936, Cast Preanger [1♀, IRSNB] . MALAYSIA: Sarawak, Kuching , 29 March 1900 [1 sp., AMNH] ;..., 30 March 1900 [1 sp., AMNH] ;..., 1 September 1897 [1 ♀, AMNH] ;..., 21 May 1900 [1 ♀, AMNH]; Penang Island (= Pulo Penang) [1♂, ZMUC] . VIETNAM: Đồng Nai Province, Cát Tiên National Park , ca. 100 m, 9 April – 13 May 2007, Mal Phy Quy and Nguyen Thanh Manh, Malaise trap [1♀, RMNH] ;..., ca. 100 m, Crocodile trail, 7 October 2005, R. de Vries [1♀, ZFMK, ZFMKDIP 00011945 ] .

Remarks

The type material of Baccha luteolimbata was studied and the two specimens were found to belong to Asiobaccha tinctiventris (Meijere) .

Figures

Figure 11. Asiobaccha tinctiventris (Meijere). a–b, e, holotype ♀. (a) Dorsal view; (b) lateral view; (e) frontal view. Asiobaccha tripartita (Walker). c–d, f, ♂. (c) Dorsal view; (d) lateral view; (f) frontal view. Scale bars: a–d = 2 mm; e, f = 1 mm.

Figure 12. Asiobaccha virtuosa (Curran). a–b, d, lectotype ♂. (a) Dorsal view; (b) lateral view; (d) frontal view. Asiobaccha maculosa Mengual & Thompson sp. nov., paratype ♀. (c) Dorsal view. Asiobaccha nubilipennis (Austen), ♀. (e) Frontal view. Asiobaccha tinctiventris (Meijere), ♂. (f) Frontal view. Scale bars: a–c = 2 mm; d–f = 1 mm.