Ceriana sartorum ( Smirnov, 1924 )

Steenis, Jeroen Van, Ricarte, Antonio, Vujić, Ante, Birtele, Daniele & Speight, Martin C. D., 2016, Revision of the West-Palaearctic species of the tribe Cerioidini (Diptera, Syrphidae), Zootaxa 4196 (2), pp. 151-209 : 179-181

Ceriana sartorum ( Smirnov, 1924)

Figs 9, 10 , 27, 28 , 44, 45 , 70 , 92 , 102–105 , 167

Cerioides sartorum Smirnov, 1924: 350 . Type locality: Kazakhstan, Turkmenistan, Uzbekistan [ST ♂, ♀, ZMUM]. Cerioides sartorum: Sack (1932) .

Ceriana sartorum: Peck (1988) , comb. nov., Huang & Cheng (2012).

Redescription. MALE ( Figs 9 , 27 ). Body length: 11.1–12.1 mm; wing length: 8.5–9.3 mm. Head ( Fig. 44 ). Face slightly protruding antero-ventrally with weakly demarcated tubercle and slightly concave below antennae. Head 2.2–2.4 times wider than face just below the antennae; length of eye contiguity 0.59–0.63 times as long as length of frons; angle of eyes at eye contiguity 120–145o. Gena, mouth edge, hypostomal bridge and a fascia around frontal prominence black. Vertical triangle and ocellar triangle black, sometimes brown to yellow; dorsal surface of head capsule yellow. Frontal prominence 3.8–5.0 times longer than wide; relative length of pedicel is as 1.0–1.2: 1: 0.82–0.87. Antennae and frontal prominence brown-yellow coloured; arista white pilose. Thorax. Scutum black with yellow maculae on postpronotum and notopleuron; a yellow vitta from postalar callus to suture at both sides, sometimes missing. Pleuron black with two yellow maculae, one each on posterior 1/2–3/5 of posterior anepisternum and on dorsal 1/4–1/3 of katepisternum, sometimes an additional small yellow macula on anteroventral part of anterior anepimeron. Metasternum with short pile and a low, rounded elevation medially on anteroventral part. Scutellum entirely yellow, sometimes posterior margin narrowly black. Legs. Coxae black; trochanter yellow; apico-medial 1/4–2/3 of pro- and mesofemur black; apical 1/4–1/3 of metafemur black; apico-medial 1/2– 1/3 of tibiae black; pro- and mesotarsus brown-yellow to black; metatarsus black. Clear patch of black setulae present on antero-basal part of pro- and mesofemur and on medial part of metatrochanter. Mesotrochanter straight dorsally; mesofemur with rather long and rugged flattened area antero-basally; metatrochanter with weak sulcus and narrow rim laterally ( Fig. 70 ); metatibia without triangular appendix on apico-ventral part; metafemur elongate and slightly curved ( Fig. 92 ). Wing. Hyaline except for anterior 1/2 and along spurious vein and along cross-vein bm-cu; sometimes even cells c and cs hyaline. Loop in vein R4+5 deep with short appendix into cell r4+5; hyaline. Cross-vein r-m slightly curved. Membrane covered in microtrichia, except on antero-basal part of cell dm; anterior part of cell bm narrowly bare; cell br posterior of vena spuria bare. Alula relatively broad, 2.8–3.3 times longer than wide. Abdomen. Black and yellow coloured. Length of tergite I: II: III: IV is as 1: 1.7–1.9: 1.7–1.9: 2.1–2.2. Width of yellow fascia medially: length of tergite of respectively tergite II, III and IV as 1: 3.1–3.3, 1: 3.7–4.2 and 1: 2.5–2.6. Tergite II wider than long, anterior part most narrow; length of tergite II: width of tergite II at respectively anterior: posterior as 1: 1.1–1.3: 1.3–1.5. Tergite I with large triangular yellow maculae on anterolateral corner, narrowly separated medially; fascia on tergite II concave medially and only little narrowed at lateral margin; fascia on tergite III straight and only slightly narrower at lateral margin; fascia on tergite IV straight, strongly narrowed towards lateral margin and reaching the lateral margin. Tergite IV with narrow margin. Tergites pock pitted with short white pile; sternites with longer white pile; pile about as long as width of metafemur. Tergite I with very low medial elevation; tergites III and IV without longitudinal elevation; with vague grey-white pollinosity medio-laterally. Sternites I–III with posterior yellow fascia. Genitalia. Epandrium with narrow ventral rim ( Figs 102, 104 ); in dorsal view, cerci rounded triangular shaped, with apico-medial sharp pointed projection, apex rounded ( Fig. 104 ), with pile about 1/4 as long as width of cerci; surstylus bi-lobed, dorsal lobe elongate, medially narrowed with wide oval apex, ventral lobe very narrowly circular with membranous basal part ( Fig. 102 ); surstylar apodeme semi-circular shaped ( Fig 105 ); hypandrium ( Figs 102, 103 ) with broad base and narrower apex, in ventral view medio-laterally broadly shouldered; with long and elongated lingula with medio-ventrally a hardly sclerotized irregular shaped flange, without medio-dorsal projection, apico-laterally with two long broadly threadlike appendages; superior lobe large semi-circular shaped, articulating with hypandrium and with dorsal ctenidion consisting of about 10–15 short to long spines (these spines are shorter and more scattered along apical and medial part); aedeagus with baso-ventral elongated and pointed projection, medial projection long threadlike, dorsal projection broadly elongate with weak sclerotized apico-ventral flange.

FEMALE ( Figs 10 , 28 ). Body length: 10.1–12.9 mm; wing length: 7.9–9.5 mm. Similar to male, except for normal sexual dimorphism and the following characters. Head ( Fig. 45 ). Head 2.0–2.2 times wider than face just below the antennae. Face with narrow medial black vitta. Frontal prominence 4.2–5.3 times longer than wide; relative length of pedicel is as 1.0–1.1: 1: 0.81–0.95. Vertex black. Wing. Alula relatively broad, 2.7–2.9 times longer than wide. Abdomen. Length of tergite I: II: III: IV: V is as 1: 2.0–2.2: 2.3–2.7: 1.9–2.1: 0.83–0.98. Width of yellow fascia medially: length of tergite of respectively tergite II, III and IV as 1: 2.6–3.0, 1: 3.6–3.8 and 1: 1.9– 2.1. Tergite II wider than long, anterior part most narrow; length of tergite II: width of tergite II at respectively anterior: posterior as 1: 0.92–1.0: 1.3–1.4.

Material examined. The types of C. sartorum were not studied. The description, however, is clear enough to assign the specimens studied here to this species. 33 Ƌ, 43 ♀ ( CDFA, NHM, ISEA, MNHN, NBC, ZIN).

Distribution ( Fig. 167 ). Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan.

Biology. Adults have been found visiting flowers of Berberis sp. Adults fly from late April to late July.

Figures

FIGURES 7 – 12. Ceriana adults, overall appearance, dorsal view. 7. Ceriana naja male, Tajikistan. 8. Ceriana naja female, Turkmenistan. 9. Ceriana sartorum male, Turkmenistan. 10. Ceriana sartorum female, Tajikistan. 11. Ceriana vespiformis male, Greece. 12. Ceriana vespiformis female, Montenegro. Scale line = 5 mm.

FIGURES 25 – 30. Ceriana adults, overall appearance, lateral view. 25 Ceriana naja male, Tajikistan 26 Ceriana naja female, Turkmenistan 27 Ceriana sartorum male, Turkmenistan 28 Ceriana sartorum female, Tajikistan 29 Ceriana vespiformis male, Greece 30 Ceriana vespiformis female, Rhodos. Scale line = 5 mm.

FIGURES 37 – 48. Head, frontal view. 37 Ceriana brunettii male, Tajikistan 38 Ceriana caesarea male, Turkmenistan 39 Ceriana conopsoides male, Greece 40 Ceriana conopsoides female, Russia 41 Ceriana glaebosa male paratype 42 Ceriana media male paratype, Afghanistan 43 Ceriana naja male, Tajikistan 44 Ceriana sartorum male, Turkmenistan 45 Ceriana sartorum female, Tajikistan 46 Ceriana skevingtoni male paratype, Azerbaijan Talish 47 Ceriana vespiformis male, Greece 48 Ceriana vespiformis female, Rhodos. Scale line = 2 mm.

FIGURES 64 – 70. Metatrochanter of Ceriana species, ventral view. 64 Ceriana brunettii, male, Azerbaijan. 65 Ceriana caesarea male, Turkmenistan 66 Ceriana conopsoides male, Estonia 67 Ceriana glaebosa paratype, male 68 Ceriana media paratype, male 69 Ceriana naja male, Tajikistan 70 Ceriana sartorum male, Kyrgyzstan. Scale line = 0.5 mm (a: 65; b: 67; c: 64, 66, 68 – 70).

FIGURES 90 – 93. Metafemur of Ceriana species, male 90 Ceriana caesarea (with tibia), Uzbekistan 91 Ceriana naja, Tajikistan 92 Ceriana sartorum, Kyrgyzstan 93 Ceriana vespiformis, Montenegro. Scale line = 1 mm.

FIGURES 102 – 105. Male genitalia of Ceriana sartorum, Uzbekistan 102 Epandrium and hypandrium, lateral view 103 Hypandrium, ventral view 104 Epandrium, dorsal view 105 Epandrium, ventral view. Scale line = 0.5 mm.

FIGURES 166 – 168. Distribution maps of the West-Palaearctic Cerioidini. 166 Ceriana brunettii (yellow circle), Ceriana caesarea (blue square) and Ceriana media (red triangle) 167 Ceriana naja (blue circle), Ceriana sartorum (yellow triangle) and Ceriana skevingtoni (red square) 168 Ceriana conopsoides (purple circle).