Ceriana naja Violovitsh, 1988

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 : 177-179

Ceriana naja Violovitsh, 1988

Figs 7, 8 , 25, 26 , 43 , 69 , 91 , 94–97 , 167

Ceriana naja Violovitsh, 1974: 87 . Type locality: Tajikistan, Uzbekistan [HT ♂ 2 PT ♀, ZIN]. Ceriana naja: Peck (1988) , Krivosheina (2001).

Redescription. MALE ( Figs 7 , 25 ). Body length: 10.4–11.6 mm; wing length: 7.3–8.6 mm. Head ( Fig. 43 ). Face slightly protruding antero-ventrally with weakly demarcated tubercle and slightly concave below antennae. Head 2.4–2.5 times wider than face just below the antennae; length of eye contiguity 0.48–0.53 times as long as length of frons; angle of eyes at eye contiguity 105–125o. Mouth edge, hypostomal bridge and a squarish macula around frontal prominence black; posterior part of genae often yellow. Vertical triangle and dorsal surface of head capsule yellow; ocellar triangle black. Frontal prominence 4.3–5.1 times longer than wide; relative length of pedicel is as 1.0–1.1: 1: 0.92–1.0. 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; scutum with white pollinose maculae medially from the transverse suture and two vague white-grey vittae antero-medially. Pleuron black with three yellow maculae, one each on posterior 1/2–3/5 of posterior anepisternum and on dorsal 1/4–1/3 of katepisternum and on antero-ventral part of anterior anepimeron. Metasternum with short pile and a low, rounded elevation medially on antero-ventral part. Scutellum entirely yellow, sometimes posterior margin narrowly black. Legs. Coxae black; trochanter yellow; apical 1/6–1/4 of femora black; apico-medial 1/2–1/3 of tibia 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 short, little rugged and flattened area anterobasally; metatrochanter with weak sulcus and narrow rim laterally ( Fig. 69 ); metatibia without triangular appendix on apico-ventral part; metafemur elongate and slightly curved ( Fig. 91 ). 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, 2.6–3.0 times longer than wide.

Abdomen. Black and yellow coloured. Length of tergite I: II: III: IV is as 1: 1.4–1.5: 1.5–1.6: 1.8–2.0. Width of yellow fascia medially: length of tergite of respectively tergite II, III and IV as 1: 2.0–2.1, 1: 2.8–3.1 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: 1.1–1.3: 1.3–1.5. Tergite I with large triangular yellow maculae on antero-lateral corner, broadly separated medially; fascia on tergite II concave medially and gradually but strongly narrowed towards lateral margin; fascia on tergites III and IV straight, slightly narrowed towards lateral margin and narrowly reaching the lateral margin. Tergite IV weakly emarginated. 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 94, 96 ); in dorsal view, cerci rounded triangular shaped, with apico-medial sharp pointed projection, apex rounded ( Fig. 96 ), with pile about 1/4 as long as width of cerci; surstylus bi-lobed, dorsal lobe elongate baso-medially narrowed, ventral lobe very narrowly circular with membranous basal part ( Fig. 94 ); surstylar apodeme semi-circular shaped ( Fig. 97 ); hypandrium ( Figs 94, 95 ) with broad base and narrower apex, in ventral view medio-laterally with narrow rounded projections; with long and elongated lingula with medio-ventrally a hardly sclerotized irregular shaped flange, ending mediodorsally in a short pointed projection, apico-laterally with two short threadlike appendages; superior lobe large semi-circular shaped and articulating with hypandrium, with two separate dorsal ctenidia, the dorsal one with about 4 short spines and the more ventral one with about 7 spines becoming longer and stronger baso-ventrally; aedeagus with baso-ventral elongated and pointed projection, medial projection long threadlike, dorsal projection broadly elongate with weak sclerotized apico-ventral flange. FEMALE ( Figs 8 , 26 ). Body length: 12.1–12.9 mm; wing length: 9.2–9.7 mm. Similar to male, except for normal sexual dimorphism and the following characters. Head. Head 2.1 times wider than face just below the antennae. Frontal prominence 4.6–4.8 times longer than wide; relative length of pedicel is as 1.1–1.2: 1: 0.88–0.93. Vertex black. Wing. Alula broad, 2.2–2.3 times longer than wide. Abdomen. Length of tergite I: II: III: IV: V is as 1: 1.8–1.9: 2.0–2.1: 1.7–1.8: 0.71–0.72. Width of yellow fascia medially: length of tergite of respectively tergite II, III and IV as 1: 2.2–2.7, 1: 2.9–3.4 and 1: 1.6–1.9. Tergite II wider than long, anterior part most narrow; length of tergite II: width of tergite II at respectively anterior: posterior as 1: 1.0–1.2: 1.5–1.6.

Material examined. Paratype of Ceriana naja : 1 ♀; "[blank silver, round label]", " Farab / NW Buchara [ Turkmenistan] / [leg.] Volman / 15-16.IV- [1]917" [in Russian ], " Paratype Ceriana / naja / Violovitsh det" [red label], ( ZIN) . Holotype Ƌ and additional paratype ♀ not studied (not present in ZIN). Additional material: 23 Ƌ, 20 ♀ ( ISEA, MNHN, ZIN) .

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

Biology. This species is found in sap-rich breeding sites in Populus diversifolia trees; the larva and puparium of C. naja are described ( Krivosheina 2001). Adults fly from mid April to mid August. Adults have been found visiting flowers of Tamarix .

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 94 – 97 Male genitalia of Ceriana naja, Turkmenistan 94 Epandrium and hypandrium, lateral view 95 Hypandrium, ventral view 96 Epandrium, dorsal view 97 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).