Wing Interference Patterns in patterned wings of Culicoides Latreille, 1809 (Diptera: Ceratopogonidae) - exploring potential identification tool Author Pielowska-Ceranowska, Agata Laboratory of Evolutionary Entomology and Museum of Amber Inclusions, Department of Invertebrate Zoology and Parasitology, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, PL 80 - 308 Gdańsk, Poland Author Szwedo, Jacek 0000-0002-2796-9538 Laboratory of Evolutionary Entomology and Museum of Amber Inclusions, Department of Invertebrate Zoology and Parasitology, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, PL 80 - 308 Gdańsk, Poland & jacek. szwedo @ ug. edu. pl; https: // orcid. org / 0000 - 0002 - 2796 - 9538 jacek.szwedo@ug.edu.pl text Zootaxa 2020 2020-10-28 4868 3 389 407 journal article 8895 10.11646/zootaxa.4868.3.4 52c4b31b-9079-462f-ac94-cf35ae0ebe36 1175-5326 4417874 FA202741-0A0D-45E6-B1EC-550C4CE0CE51 Culicoides ( S. ) tropicalis Kieffer, 1913 ( Fig. 10a, b ) Chemical pigmentation ( Fig. 8a ). Light spots on a dull background. Pigment patterns with clearly defined boundaries. Cell r2 , including distal part of C vein uniformly dark. An irregular light patch beginning at the distal end of the sc cell including part of C vein, smoothly passing down to the SC and R veins, and covering part of r1 cell, and ⅔ of the R-M crossvein. Two pale spots in the medial part of the wing. Three light patches in the r3 cell; proximal one abuts with distal end of C vein and covers the wing edge. Two light spots in m1 cell, and single in m2 cell. Uneven, light, moderately large patch in cua1 cell. In the anal cell, one clearly visible light spot terminating in a streak abuts with edge of the anal margin. FIGURE 10. Culicoides tropicalis (female— 19 ), a— photograph of wing on white background, b —WIP visualization. Interference patterns ( Fig. 8b ). Dominant colours: pale yellow, orange, violet-pink, blue. Structural colours in place of naturally occurring bright spots, light orange to yellowish. Interference colours corresponding to the dark pigment on the wings mostly in shades of blue and violet-pink. Venation quite clearly marked, veins surrounded by orange bands. Patterns of light markings same in pigmentation and WIP. More distinct WIP marking in anal portion (pale violet streak in the proximal part of the anal cell which is not visible with natural light).