Boreskov

PP‐42Plate 1. Middle Ordovician, Llandeilian, Kazakhstan, Chagan River (after Nazarov, 1988) – figs. 1, 2.Lower Carboniferous, Tournasian, South Urals, Orienburg Region – fig 2. Middle Devonian, Eifelian,Prague Basin, Czech Republic – figs. 3, 4. Upper Devonian, Lower Famennian: Polar Urals, Palnik‐YuRiver – figs. 8‐13; Middle Urals, Perm Region, Vilva River – figs. 14‐17; Middle Frasnian, DomanikFormation: Timan–Pechora Bassin, Lyajol River – figs. 18, 19, Domanik River – figs. 20, 21.Figs. 1, 2. Anakrusa myriacantha: 1 – (scale bar, 30 µm), 2 – (157 µm). Figs. 3‐5. Palacantholithusstellatus: 3 – (126 µm), 4 – (110 µm), 5 – (13 µm). Figs. 6, 7. Astroentactinia crassata: 6 – (29 µm),7 – (86 µm). Figs. 14, 15. Polyentactinia rudihispida: 17 – (18 µm), 18 – (59 µm). Figs. 10, 11.Bientactinosphaera zuraevi: 10 – (5 µm), 11 – (68 µm). Figs. 12, 13. Entactinia bella: 12 – (50 µm),13 – (5 µm). Figs. 14‐17. Haplentactinia alekseevi: 18 – (13 µm), 19 – (59 µm), 20 – (62 µm),21 – (12 µm). Figs. 18, 19. Palacantholithus stellatus: 18 – (7 µm), 19 – (133 µm). Figs. 20, 21.Triaxonida sp.: 20 (118 µm.), 21 (29 µm).209