Sphegina (Asiosphegina) javana de Meijere, 1914

Steenis, Jeroen Van, Hippa, Heikki & Mutin, Valeri A., 2018, Revision of the Oriental species of the genus Sphegina Meigen, 1822 (Diptera: Syrphidae), European Journal of Taxonomy 489, pp. 1-198 : 109-111

Sphegina (Asiosphegina) javana de Meijere, 1914

Figs 45F , 47E , 50E , 51 , 52E

Sphegina javana de Meijere, 1914: 166 . Type locality: Gunung Gedeh, Java, Indonesia (lectotype, ♂, NBC).

Differential diagnosis

Sphegina (Asiosphegina) javana is similar to S. (A.) exilipes sp. nov. For distinguishing characters, see under the latter.

Material examined

Lectotype (here designated)

JAVA • ♂; “ E. Jacobson / Goenoeng Gedeh / Java Maart 1911”; NBC.

Paralectotype (here designated)

JAVA • 1 ♂; same data as for lectotype; NBC .

Redescription

Male

LENGTH. Body 5.1–5.7 mm, wing 3.8–4.6 mm.

HEAD. Face in lateral view concave, weakly projected antero-ventrally; frontal prominence weakly developed. Ratio width of vertex at anterior ocellus: width of head 1: 4.8–5.2; ratio width of ocellar triangle: width of vertex 1: 1.7–1.8; ratio length of ocellar triangle: length of frons 1: 2.2–2.4. Face yellow, light grey pollinose, long pilose along eye-margin. Hypostomal bridge yellow, long pale pilose. Gena and mouth edge yellow with large subtriangular non-pollinose shiny area. Frons and vertex black, sub-shiny, slightly grey pollinose, a circular area posterior of lunula non-pollinose and shiny and with narrow more densely grey pollinose fascia posterior of shiny part; pile short, light yellow. Frons with weak pit anteriorly and weak but wide furrow medially. Occiput black, light grey pollinose, light yellow pilose. Eye with enlarged facets at anterior margin. Antenna dark brown to black with black setae dorsally on scape and pedicel; basoflagellomere oval, ratio width: length 1: 1.1–1.2; arista with basal 1/5 short pilose, about 3 times as long as basoflagellomere.

THORAX. Colour dark brown to black, greyish pollinose; scutum with more densely grey pollinose vitta submedially (in lectotype vitta narrower and scutum otherwise less pollinose than in paralectotype); postpronotum brown-yellow; posterior margin of katepisternum narrowly non-pollinose, shiny; scutum and pleuron with very short adpressed light yellow pile. Scutellum semicircular, black, shiny, with pile slightly longer than on scutum, with two widely set, short setae medially at posterior margin, ratio length of scutellum: length of seta 1: 1.2–1.4.

WING. Microtrichose, bare on basal 1/5– ⅓ of cell cup CuP; hyaline, stigma yellowish. Crossvein dm-cu strongly oblique to vein M and vein M

1

meeting vein R

4+5

perpendicularly.

LEGS. Pro- and mesoleg yellow, tarsomeres 4 and 5 black. Metaleg, Fig. 52E , with coxa black, trochanter yellow; femur black and yellow biannulate, slightly incrassate, ratio width: length 1: 3.9–4.2; tibia black and yellow biannulate, without apicoventral dens; tarsus entirely black, basitarsomere thin, ratio width: length 1: 3.7–4.5.

ABDOMEN. Length ratio of terga I: II: III: IV 1: 5.5–5.9: 2.1–2.6: 1.6–2.1; ratio width at posterior margin: medial length of tergum II and III 1: 3.7–3.9 and 1: 0.6–0.7. Terga black, anterior 1: 2.5–2.8 of tergum III with brown-yellow fascia; pile pale, on terga short, laterally on terga I and II long; tergum I, Fig. 47E , with an oblique row of 4–5 light yellow setae at lateral margin; sternum III rectangular, ratio width: length 1: 1.7–1.8; sternum IV, Fig. 51A ; sterna VI, VII and VIII simple, with long yellow pile. Genitalia, Fig. 51 B–C: note the unusual lobe posterodorsally on the left side of tergum IX, asymmetrical cerci and only slightly asymmetrical surstyli and superior lobes

Female

Unknown.

Figures

Fig. 45. Habitus, lateral view. A. Sphegina (Asiosphegina) incretonigra sp. nov., holotype, Ƌ, Vietnam. B. S. (A.) index Hippa, van Steenis & Mutin, 2015, holotype, Ƌ, Myanmar. C. S. (A.) inflata sp. nov., holotype, Ƌ, Philippines. D. S. (A.) cf. inflata sp. nov., ♀, Philippines. E. S. (A.) inventum sp. nov., holotype, Ƌ, Sabah, Malaysia. F. S. (A.) javana de Meijere, 1914, lectotype Ƌ, Java, Indonesia. Scale bars = 1.0 mm.

Fig. 47. Tergum I, lateral view (A, C–D) and dorsal view (B, E–F). A. Sphegina (Asiosphegina) dentata sp. nov., paratype, Ƌ, Taiwan. B. S. (A.) distincta sp. nov., paratype, Ƌ, Vietnam. C. S. (A.) falcata Hippa, van Steenis & Mutin, 2015, holotype, Ƌ, Myanmar. D. S. (A.) farinosa sp. nov., holotype, Ƌ, Sabah, Malaysia. E. S. (A.) javana de Meijere, 1914, Paralectotype Ƌ, Java, Indonesia. F. S. (A.) lobulata sp. nov., paratype, Ƌ, Vietnam. Dotted line indicates unknown length of right sided setae, the right metaleg (erased in GIMP) obscured these setae. Scale bars = 0.5 mm,

Fig. 50. Habitus, dorsal view. A. Sphegina (Asiosphegina) hauseri sp. nov., paratype, ♀, Nepal. B. S. (A.) index Hippa, van Steenis & Mutin, 2015, ♀, Myanmar. C. S. (A.) cf. inflata sp. nov., ♀, Philippines. D. S. (A.) inventum sp. nov., paratype, ♀, Sabah, Malaysia. E. S. (A.) javana de Meijere, 1914, lectotype Ƌ, Java, Indonesia. F. S. (A.) karnataka sp. nov., paratype, Ƌ, India. Scale bars = 1.0 mm.

Fig. 51. Sphegina (Asiosphegina) javana de Meijere, 1914, paralectotype, Ƌ. A. Sternum IV, ventral view. B. Genitalia left side, lateral view. C. Genitalia right side, lateral view.Scale bars = 0.5 mm.

Fig. 52. Metaleg, dorsal view (A) and anterior view (B–F). A. Sphegina (Asiosphegina) hansoni Thompson, 1966, holotype, Ƌ, Nepal. B. S. (A.) index Hippa, van Steenis & Mutin, 2015, ♀, Kambaiti. C. S. (A.) cf. inflata sp. nov., ♀, Philippines. D. S. (A.) inventum sp. nov., paratype, ♀, Sabah. E. S. (A.) javana de Meijere, 1914, paralectotype, Ƌ, Java. F. S. (A.) karnataka sp. nov., paratype, Ƌ, India. Scale bars = 0.5 mm.