The new species of Holocentropus, Plectrocnemia and Phryganea (Insecta: Trichoptera) from Eocene Rovno amber Author Melnitsky, Stanislav I. 0000-0003-4535-1886 Department of Entomology, Faculty of Biology, St. Petersburg State University, Universitetskaya nab. 7 / 9, St. Petersburg 199034, Russia; E-mail: simelnitsky @ yandex. ru; https: // orcid. org / 0000 - 0003 - 4535 - 1886; https: // orcid. org / 0000 - 0003 - 3294 - 4965 Author Ivanov, Vladimir D. 0000-0003-4535-1886 Department of Entomology, Faculty of Biology, St. Petersburg State University, Universitetskaya nab. 7 / 9, St. Petersburg 199034, Russia; E-mail: simelnitsky @ yandex. ru; https: // orcid. org / 0000 - 0003 - 4535 - 1886; https: // orcid. org / 0000 - 0003 - 3294 - 4965 Author Vasilenko, Evgeny E. Perkovsky Dmitry V. Author Legalov, Andrei A. 0000-0001-7347-8169 Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, 630091 Novosibirsk, Russia; & Department of Ecology, Biochemistry and Biotechnology, Altai State University, 656049 Barnaul, Russia; & Department of Forestry and Landscape Construction, Tomsk State University, 634050 Tomsk, Russia; Corresponding author. E-mail: fossilweevils @ gmail. com; https: // orcid. org / 0000 - 0001 - 7347 - 8169 text Ecologica Montenegrina 2024 2024-11-22 80 1 12 https://doi.org/10.37828/em.2024.80.1 journal article 10.37828/em.2024.80.1 2336-9744 14653188 838F6B2E-A066-4B36-A682-098BFEFB753A Plectrocnemia pluripotentia Melnitsky, Ivanov & Perkovsky sp. n. https://zoobank.org/ urn:lsid:zoobank.org:act: C2CBD778-62BF-4CEB-8386-462865177C39 ( Figs 3 , 4 , 9 B ) Type material: Holotype . Male. SIZK K–27466, Klesov , Rovno amber, late Eocene. Description. Body length 3.1 mm ; forewing length 4.0 mm. Head and antennae yellowish, thorax, legs, abdomen, and wings brown with light brown hairs. Head with light hairs. Male genitalia. Inferior appendages elongate with large lobe-shaped oval flat extension at the apex. Posterior margin of segment X on caudal view with membranous body and two small spines directed forward, there are two small sclerotized areas under this lobe. Membranous body of segment X is located near the oval extended apex of inferior appendages. The apex of the aedeagus is pointed, sclerotized, curved downwards. Figure 3 . Plectrocnemia pluripotentia sp. nov. Male type, general view, ventral. Scale bar = 1 mm. Comparison. The new species has some similarity with Plectrocnemia ventralis Ulmer, 1912 and differs from it in the shape of dorsal complex of genitalia: P. ventralis has two powerful spines of segment 10 directed backwards, the new species has smaller spines directed other way. Ulmer (1912) suggested presence of the color variation in P. ventralis : some specimens were black and some were amber yellow. We have the brown-tinted type specimen. The difference might be related to species distinction, although may represent different degree of preservation. Figure 4 . Plectrocnemia pluripotentia sp. nov. Male type, genitalia, ventral. Scale bar = 0.1 mm. Etymology. The specific name pluripotentia from Latin (pluralis – multiple and potentia – possibility, ability, strength). Distribution. Priabonian Rovno amber. Remarks . The specimen was found in the small piece of amber ( 1.3 g after primary treatment) from Pugach quarry ( Mitov et al. 2021 ). Phryganeidae Leach, 1815