Eumerus turanicus

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Taxonavigation

Ordo: Diptera
Familia: Syrphidae
Genus: Eumerus

Name

Eumerus turanicus Stackelberg, 1952 – Wikispecies link – Pensoft Profile

Diagnosis

(based on Stackelberg 1952). Body bronze-green. Legs dark bronze green, tip of the femora, basal half as well as the tips of the tibia and tarsi reddish yellow. Metaleg with basotarsomere not expanded nor shortened, longer than second and third segment combined. Basoflagellomere oval-shaped (Fig. 2I). s4 figured in Stackelberg (1952, 1961), gradually narrowing, with an incision posteriomedially, with two rounded, densely pilose angles at the apex of s4, with two rounded, spatulate lobes on both sides of the incision. Male terminalia figured in Stackelberg (1952, 1961), with dense pilosity on the main branch of the posterior surstyle lobe, cerci with distinct thorn-like projections.

An identification key to the males of the Central and Eastern Palaearctic species of the Eumerus bactrianus subgroup

An identification key to the males of the Central and Eastern Palaearctic species of the Eumerus bactrianus subgroup — J. Smit , T. Zeegers , P. Dorji

1		All tarsi entirely black. Basoflagellomere rectangular (Fig. 2G), with a rounded posterior corner. Abdomen with t2 and t3 shiny black in the middle, amplified by the short adpressed black pile, continuing on the basal part of t4. Abdominal t3 and t4 with long, silvery, ventrally directed, white pile on the lateral sides, s4 without an incision posteriomedially, but middle part of sternite less sclerotized. Terminalia: posterior surstyle lobe with a tuft of long pile just anteriorto the bifurcation    E. druk Smit, sp. nov.
–		Tarsi predominantly reddish-yellow. Basoflagellomere trapezoid, oval or triangular shaped. Abdomen with t2–4 with the same bronze-green luster as laterally. Male: s4 with a clear incision posteromedially and posterior surstyle lobe lacking the tuft of long pili prior to the bifurcation    2
2		Basoflagellomere trapezoid (Fig. 2F). s4 without lobes on both sides of the posteriomedially incision, with a deep and sharp notch. Terminalia: anterior surstyle lobe elongated, ventral margin of posterior surstyle lobe greatly produced    E. bactrianus Stackelberg
–		Basoflagellomere not trapezoid but oval or triangular. s4 with a deep, angular incision posteriomedially    3
3		Basoflagellomere triangular (Fig. 2H). s4 gradually widening posteriorly, with a broad incision posteriomedially, with two sharp angles well below the apex of s4 and two rounded lobes on both sides of the incision. Terminalia: posterior surstyle lobe with a ventral triangular extension    E. turanicola Stackelberg
–		Basoflagellomere oval (Fig. 2I). s4 gradually narrowing posteriorly, with an incision posteriomedially, with two rounded, densely pilose angles at the apex, with two rounded, spatulate lobes on both sides of the incision. Terminalia: with dense pilosity on the main branch of the posterior surstyle lobe, cerci with distinct thorn-like projections    E. turanicus Stackelberg

Taxon Treatment

• Smit, J; Zeegers, T; Dorji, P; 2020: A new species of Eumerus (Diptera, Syrphidae) from the Kingdom of Bhutan, the easternmost representative of the bactrianus subgroup ZooKeys, 906: 141-151. doi

Images

Figure 2. Eumerus druk Smit, sp. nov., male holotype A epandrium, lateral view B surstyle lobe, ventral view C hypandium, lateral view D hypandrium, ventral view E fourth sternum. Eumerus bactrianus Stackelberg, 1952, male F antenna, lateral view. Eumerus druk sp. nov. G antenna, lateral view. Eumerus turanicola Stackelberg, 1952, male H antenna, lateral view, after (Stackelberg 1952). Eumerus turanicus Stackelberg, 1952, male I antenna, lateral view, after (Stackelberg 1952).