Ceriana naja Violovitsh 1988
Creators: name: Steenis, Jeroen Van
name: Ricarte, Antonio
name: Vujić, Ante
name: Birtele, Daniele
name: Speight, Martin C. D.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Ceriana
Ceriana naja

description: 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.
description: Published as part of 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), pp. 151-209 in Zootaxa 4196 (2) on pages 177-179, DOI: 10.11646/zootaxa.4196.2.1, http://zenodo.org/record/167924