The article provides an overview of the species Stylosomus flavus Marseul, 1875 in southern Russia and describes its forms. The first form, typical and similar to the nominative subspecies, has yellow elytra with a darkened suture. The second form, identified as a separate color variation from the southeastern region of the European part of Russia, differs from the typical form with light elytral sutures and basal segments of leg joints, as well as the apical edge of the aedeagus. The third form is a mountain form named f. teberdensis, found in the North Caucasus (Republic of Karachay-Cherkessia). It differs from the typical form with denser punctation on the pronotum, shorter setae on the pronotum, and darker coloration of the body. The predominant colour of this form is brown, whereas the typical form is yellow. The spermatheca of this form is almost symmetrical, while in the typical form one of the parts is broader. This form develops on Myricaria bracteata Royle, unlike the typical form, which develops in the Pre-Caucasus region on species of the genus Tamarix L.
Cryptocephalinae, Stylosomus, Stylosomus flavus, Stylosomus flavus f. teberdensis, Stylosomus tamarisci.
1. Ben'kovskiy A. O. Opredelitel' zhukov-listoedov (Coleoptera, Chrysomelidae) evropeyskoy chasti Rossii i evropeyskih stran blizhnego zarubezh'ya. – M., 1999. – 204 s.
2. Bobrov E. G. Tamaricaceae Link. – Grebenschikovye // Flora evropeyskoy chasti SSSR. T. 4. Pokrytosemennye: Dvudol'nye, Odnodol'nye. – L.: Nauka, 1979. – S. 151–155.
3. Gorshkova S. G. Grebenschikovye – Tamaricaceae Lindl. // Flora SSSR. T. 15. – M.–L.: Izd-vo AN SSSR, 1949. – S. 276–327.
4. Krylenko S. V., Krylenko V. V., Krylenko M. V. O vozmozhnosti ispol'zovaniya Tamarix kak indikatora dinamiki rel'efa // Byulleten' nauki i praktiki. – 2020. – T. 6, № 11. – S. 57–69. DOI:https://doi.org/10.33619/2414-2948/60/06 Lopatin I. K. Zhuki-listoedy podsemeystva Cryptocephalinae (Coleoptera, Chrysomelidae) Rossii i sopredel'nyh territoriy. – SPb.: Nauka, 2005. – (Opredeliteli po faune, izdavaemye Zoologicheskim institutom RAN. Vyp. 172).
5. Medvedev L. N., Shapiro D. S. Chrysomelidae – listoedy // Opredelitel' nasekomyh evropeyskoy chasti SSSR v pyati tomah. T.2. Zhestkokrylye i veerokrylye. – M–L.: Nauka, 1965. – S. 419-474.
6. Moseyko A. G. Skrytoglavy roda Stylosomus Suffrian, 1848 (Coleoptera, Chrysomelidae) fauny Yuzhnoy Sibiri // Entomologicheskoe obozrenie. – 2017. – T. 96, vyp. 4. – S. 833–838.
7. Visyulina O. D. Tamaricaceae // Flora URSR. T. 7. – Kiiv: Akademiya nauk Ukrain'skoi RSR, 1955. –322– 326.
8. Baum B. Monographic revision of the genus Tamarix. – Ierusalem: Department of Botany Hebrew University, 1966. – 193 p.
9. Mapa Bioróżnorodności [Elektronnyy resurs]. – Krajowa Sieć Informacji o Bioróżnorodności. – 2023. – Rezhim dostupa: https://baza.biomap (data obrascheniya: 2.09.2023).
10. Marseul S. A. Monographie des Cryptocéphales du nord de l‘Ancien-Monde // Abeille. – 1875. – 13. – P. 1–108. Müller G. Contributo alla conoscenza dei coleotteri fitofagi (Cerambycidae e Chrysomelidae) // Atti del Museo
11. Civico di Storia naturale di Trieste. – 1948. – 17. – P. 61–98.
12. Warchałowski A. The Palaearctic Chrysomelidae. Identification Keys. Vol. 1. – Warszawa: Natura optima dux Foundation, 2010. – 629 p.
