Sphegina (Asiosphegina) pusilla, Hippa, Heikki, Steenis, Jeroen Van & Mutin, Valeri A., 2015

Hippa, Heikki, Steenis, Jeroen Van & Mutin, Valeri A., 2015, The genus Sphegina Meigen (Diptera, Syrphidae) in a biodiversity hotspot: the thirty-six sympatric species in Kambaiti, Myanmar, Zootaxa 3954 (1), pp. 1-67: 53-54

publication ID


publication LSID


persistent identifier


taxon LSID


treatment provided by


scientific name

Sphegina (Asiosphegina) pusilla

sp. n.

Sphegina (Asiosphegina) pusilla  sp. n.

Figs 33View FIGURE 33 A –D

MALE. Body length 4.9–5.5 mm, wing length 4.2–4.6 mm. Head. Face strongly concave and weakly projected antero-ventrally; frontal prominence very weakly developed (similar to Fig. 1 E). Width of vertex at anterior ocellus:width of head 1: 4.3; depth of occipital concavity ca. 1 / 6 of the width of an eye in dorsal view. Width of face:width of head 1: 4.8. Face dark brown, pale pollinose. Gena shiny brown. Frons and vertex black, lunula brownish; frontal prominence shiny dark brown, the more posterior parts densely pale pollinose, behind frontal prominence with diffused fascia of denser pollinosity; the pile short, erect and pale. Occiput dull black. Eye with a large area of enlarged facets at anterior margin. Antenna with scapus and pedicellus yellow or brownish, basoflagellomere darker brown, oval; arista nonpilose. Thorax. Colour black, faintly pale pollinose, the pile pale, short, almost invisible on dorsal parts; scutellum semicircular, shiny, a pair of thin, short, pale setae at apical margin. Wing. Hyaline, stigma brownish. Legs. Pro- and mesoleg yellow, tarsomeres 4 and 5 black. Metaleg: coxa brown; trochanter simple, yellow; femur yellow, the apex and a wide annulus on the basal 1 / 2 brown; tibia without apico-ventral tooth, yellowish, the apical part and an annulus on the basal 1 / 2 brown; tarsus dark brown.

Abdomen. Length ratio of tergites I, II, III and IV 1: 4.1:2.0: 1.4. Tergites shiny brown, tergite III with a yellow subanterior fascia, its width about 1 / 3 of the tergite length, the pile of tergites pale, short, adpressed, with some brown pile on posterior 1 / 2 of tergite; tergite I with an oblique row of 3–4 pale setae laterally; sternite IV ( Fig. 33View FIGURE 33 A) brownish, the posterior part paler yellowish, the pile pale; sternites VI –VIII black, the pile short and pale. Genitalia, Figs 33View FIGURE 33 B –D. Note the slightly modified cercus and the asymmetrical surstyli. The superior lobes are symmetrical. Sternite IX is asymmetrical. FEMALE. Unknown.

Type material. HOLOTYPE. ♂, N.E. Burma, Kambaiti, 7000 ft, 14.v. 1934, R. Malaise  ( SMNH). PARATYPE. 1 ♂ with same data as holotype, also labeled Sphegina asciiformis Brun  , det. v. Doesburg ( NBC).

Etymology. The name is Latin, pusilla  , very little, referring to the small size of the fly.

Discussion. Sphegina pusilla  is similar to S. minuta  and S. parvula  and in lesser extent to S. sinesmila  . For further discussion, see under S. parvula  above.


Saskatchewan Museum of Natural History