Ceriana brunettii (Shannon, 1927)

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 : 164-166

Ceriana brunettii (Shannon, 1927)

Figs 1, 2 , 19, 20 , 37 , 56–58 , 64 , 166

Tenthredomyia brunettii Shannon, 1927b: 45 . Type locality: Pakistan [HT ♂, AT ♀, NHM]. Ceriana brunettii: Violovitsh (1974) comb. nov.

Redescription. MALE ( Figs 1 , 19 ). Body length: 9.1–11.5 mm; wing length: 6.3–7.8 mm. Head ( Fig. 37 ). Face slightly protruding antero-ventrally, with a weakly demarcated tubercle and slightly concave below antennae. Head 2.1–2.2 times wider than face just below the antennae; eye contiguity 0.59–0.67 times as long as length of frons; angle of eyes at eye contiguity 115–125o. Face with a rectangular vitta from eye margin to mouth edge, a short medial vitta on tubercle and an upside down turned V-shaped black macula at level of the frontal prominence. Vertical triangle, dorsal surface of head capsule and a squarish macula on the area of the dorsal surface of head capsule posterior to the ocelli black (the reminder yellow). Frontal prominence 5.0–5.8 times longer than wide; relative length of pedicel is as 1.0–1.1: 1: 0.71–0.83. Antenna and frontal prominence brownish yellow to black; arista with white pile.

Thorax. Scutum black; yellow maculae on postpronotum and notopleuron connected by a broad yellow vitta. Scutum with a lateral, oval, yellow macula between postalar callus and transverse suture, sometimes without macula. Scutum with white pollinose maculae medially to the transverse suture and two vague white-grey vittae along antero-medial margin. Pleuron black except for the yellow 1/2–3/5 of posterior anepisternum posteriorly, 1/ 3–1/4 of katepisternum dorsally and nearly the entire anepimeron. Metasternum with short pile and a low, rounded elevation medially on antero-ventral part. Scutellum entirely yellow. Legs. Colour yellow with black; coxa black; trochanter yellow; apical 1/8–1/6 of profemur black; apical 1/6–1/5 of meso- and metafemur black; apical 1/4–1/3 of pro- and mesotibia black; apical 1/5–1/3 of metatibia black; tarsus dark-brown to black, sometimes first 2 tarsomeres of pro- and mesotarsus brown-yellow to yellow. Metatrochanter with dense black setulae medially and scattered black setulae posteriorly ( Fig. 64 ). Mesofemur without flattened area antero-basally; metatrochanter with a weak sulcus and a narrow rim laterally. Metatibia without an appendix; metafemur elongate and slightly curved. Wing. Hyaline except for anterior 1/2, along vein R4+5, and along spurious vein. Loop of vein R4+5 deep, with a short appendix. Cross-vein r-m slightly curved. Wing microtrichose, except for the basal half of cell br, area posterior to vena spuria and along apical half of cell bm. Alula microtrichose, more sparsely on the posterior half; alula 2.4–2.7 times longer than wide.

Abdomen. Length of tergite I: II: III: IV is as 1: 1.5–1.6: 1.7–1.8: 1.5–1.6. Width of yellow fascia medially: length of tergite of respectively tergite II, III and IV as 1: 3.3–3.7, 1: 3.5–4.1 and 1: 2.4–2.6. Tergite II wider than long, although anterior margin narrower than posterior margin; length of tergite II: width of tergite II at respectively anterior: posterior as 1: 1.0–1.1: 1.1–1.4. Tergite I with a large triangular yellow macula on each antero-lateral corner (maculae separated by a short distance). Posterior margin of tergites II–IV with a broad, yellow fascia tapering abruptly just before lateral margin of tergite; lateral margin of tergite IV black and very narrowly emarginated. Tergite I with a low medial elevation. Tergites III and IV medially with a very inconspicuous longitudinal elevation. Tergites III and IV with variable amount of grey-white pollinosity mediolaterally (tergite IV entirely pollinose). Sternites I–III with narrow yellow posterior margin. Genitalia. Epandrium with rather narrowly emarginated ventral rim ( Figs 56, 57 ); in dorsal view, cerci bean shaped ( Fig. 57 ), with pile about as long as the width of cerci; surstylus bi-lobed, dorsal lobe elongate, ventral lobe circular ( Fig. 56 ); surstylar apodeme separated in two triangular shaped sclerotized parts; superior lobe and lingula as in Fig. 56 ; aedeagus with an elongated and apically pointed extension baso-ventrally; with an elongate extension, originating from the medial part of aedeagus, ventro-medially, with a triangular-shaped projection apically on dorsal margin; apex of aedeagus duck-head shaped ( Fig. 58 ). FEMALE ( Figs 2 , 20 ). Body length: 9.5–10.2 mm; wing length: 7.2–7.9 mm. Similar to male, except for normal sexual dimorphism and the following characters. Head. 2.0–2.1 times wider than face just below the antennae. Frontal prominence 5.2–5.9 times longer than wide; relative length of pedicel is as 1.0– 1.1: 1: 0.79–0.88. Frons with a yellow fascia from eye to eye; vertex black with a large, triangular, yellow macula medially; dorsal surface of head capsule yellow with a squarish black medial macula posterior to the ocellar triangle. Legs. Metatrochanter with black setulae medially. Wing. Alula broad, 2.3–2.5 times longer than wide. Abdomen. Length of tergite I: II: III: IV: V is as 1: 1.6–1.8: 2.1–2.4: 1.7–2.0: 0.5–0.7. Width of yellow fascia medially: length of tergite of respectively tergite II, III and IV as 1: 3.1–3.5, 1: 3.3–3.6 and 1: 2.1–2.3. Tergite II wider than long (anterior margin narrower than posterior); length of tergite II: width of tergite II at respectively anterior: posterior as 1: 1.1–1.2: 1.5–1.6. Tergites II–IV extensively pollinose.

Material examined. Holotype and allotype of Ceriana brunettii : 1 Ƌ, "Holo- / type " [round white label with red margin], "British Baluchistan / Quetta / July 1902 / Lt. Col. C.G. Nurse", " Quetta / 7.02.", " Tenthredomyia / brunettiii / Shannon " ( NHM) ; 1 ♀, "allo / Type " [round white label with red margin], "British Baluchistan / Quetta / July 1902 / Lt. Col. C.G. Nurse", " Quetta / 7.03." ( NHM) . Additional material: 26 Ƌ, 15 ♀ (NHM, MZLU, NBC, ZIN).

Distribution ( Fig. 166 ). Afghanistan, Pakistan, Tajikistan, Turkmenistan, Uzbekistan.

Biology. Adults have been found visiting flowers of Matricaria chamomilla . They fly from late May to mid September, with an apparent peak in late August to early September. Larva unknown.

Figures

FIGURES 1 – 6. Ceriana adults, overall appearance, dorsal view. 1. Ceriana brunettii male, Tajikistan. 2. Ceriana brunettii female, Uzbekistan. 3. Ceriana caesarea male, Turkmenistan. 4. Ceriana caesarea female, Turkmenistan. 5. Ceriana glaebosa male paratype 6 Ceriana glaebosa female paratype. Scale line = 5 mm.

FIGURES 19 – 24. Ceriana adults, overall appearance, lateral view. 19 Ceriana brunettii male, Tajikistan 20 Ceriana brunettii female, Uzbekistan 21 Ceriana caesarea male, Turkmenistan 22 Ceriana caesarea female, Turkmenistan 23 Ceriana glaebosa male, paratype 24 abdomen Ceriana glaebosa female, paratype. 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 56 – 58. Male genitalia of Ceriana brunettii, Tajikistan. 56 Epandrium and hypandrium, lateral view 57 Epandrium, dorsal view 58 Aedeagus, lateral view. Scale line = 0.5 mm (a: 56, 57; b: 58).

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 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).