Plectrocnemia pluripotentia Melnitsky, Ivanov & Perkovsky, 2024

Melnitsky, Stanislav I., Ivanov, Vladimir D., Vasilenko, Evgeny E. Perkovsky Dmitry V. & Legalov, Andrei A., 2024, The new species of Holocentropus, Plectrocnemia and Phryganea (Insecta: Trichoptera) from Eocene Rovno amber, Ecologica Montenegrina 80, pp. 1-12 : 4-5

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.

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.

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

Figures

Figure 3. Plectrocnemia pluripotentia sp. nov. Male type, general view, ventral. Scale bar = 1 mm.

Figure 4. Plectrocnemia pluripotentia sp. nov. Male type, genitalia, ventral. Scale bar = 0.1 mm.

Figure 9. A – Holocentropus vottakvot sp. nov. Male type, genitalia, ventral. B – Plectrocnemia pluripotentia sp. nov. Male type, genitalia, ventral. C – Phryganea vkoivekiraz sp. nov. Male type, genitalia, ventral. D – Phryganea vkoivekiraz sp. nov. Male type, genitalia, ventrolateral.