Sphegina (Asiosphegina) javana de Meijere 1914
Creators: name: Steenis, Jeroen Van
name: Hippa, Heikki
name: Mutin, Valeri A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Sphegina
Sphegina javana

description: 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.
description: Published as part of Steenis, Jeroen Van, Hippa, Heikki & Mutin, Valeri A., 2018, Revision of the Oriental species of the genus Sphegina Meigen, 1822 (Diptera: Syrphidae), pp. 1-198 in European Journal of Taxonomy 489 on pages 109-111, DOI: 10.5852/ejt.2018.489, http://zenodo.org/record/3830537