Apomyelois bistriatella ( Hulst, 1887 )

Yepishin, Viktor, Khalaim, Yevhenii, Demyanenko, Serhii, Govorun, Oleksandr, Novytskyi, Sergiy & Tsykal, Serhii, 2025, New records of little known pyraloid moths (Lepidoptera: Pyraloidea) from different regions of Ukraine, Zootaxa 5696 (1), pp. 1-27 : 10

Apomyelois bistriatella ( Hulst, 1887)

( Figs 11–12 , 16–17 )

Material examined: Zhytomyr reg., Korosten distr., 1.5 km NE Voroneve vill. , left bank of the r. Vuzh, at light, 3–4.VI.2019, 1♀ V. Yepishin leg. and gen. prep. 834.25s . Luhansk reg., Siverskodonetsk distr., S vic. of Sievierodonetsk [Siverskodonetsk], dacha near the lake Kleshnia , at light, 20.VIII.2021, 1♀ S. Demyanenko leg.; gen. prep. 626.22s V. Yepishin (all VYe) .

Distribution in Ukraine: Kyiv reg.: iNaturalist 2025 (122913615). First record from Zhytomyr region and first confirmed record from Luhansk region (see Remarks section of Apomyelois cognata ).

Remarks. The adults of A. bistriatella ( Figs 11–12 ) are quite similar to A. cognata ( Figs 13–15 ), but differ by darker wing colouration and often smaller sizes. In female genitalia, the corpus bursae is elongated, spindle-shaped, the apex is more pointed ( Figs 16–17 ), in A. cognata , the shape of corpus bursae is pyriform, and the apex is more rounded ( Figs 18–19 ). The male genitalia of A. bistriatella are almost indistinguishable from those of A. cognata , the most important feature is the almost flat, with a slight depression, top of the transtilla, which in A. cognata is noticeably bifurcated ( Fig. 20a ).

Figures

FIGURES 11–15. Adults of Apomyelois spp.: 11. Female of A. bistriatella, 834.25s, wingspan 20.5 mm, Voroneve. 12. Female of A. bistriatella, 626.22s, wingspan 17.5 mm, Siverskodonetsk. 13. Female of A. cognata, 634.22s, wingspan 21 mm, Siverskodonetsk: 13a. Spread specimen; 13b. live specimen (photo by S. Demyanenko). 14. Male of A. cognata, 627.22s, wingspan 20 mm, Siverskodonetsk. 15. Female of A. cognata, 625.22s, wingspan 20 mm, Siverskodonetsk (photo by S. Demyanenko).

FIGURES 16–20. Genitalia of Apomyelois spp.: 16. Female genitalia of A. bistriatella, 834.25s. 17. Female genitalia of A. bistriatella, 626.22s. 18. Female genitalia of A. cognata, 625.22s. 19. Female genitalia of A. cognata, 634.22s. 20. Male genitalia and segment VIII of A. cognata, 627.22s: 20a. Ventral view, transtilla and juxta separated; 20b. Aedeagus; 20c. Sternite VIII (culcita); 20d. Tergite VIII.