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Afanasieva 2000


PLATE 8.
Main thin three-edged spines wirh three-petalled basal cross-section of the subfamilies
Astroentactiniinae, Entactiniinae and Bientactinosphaerinae
Upper Devonian, Middle Frasnian, Domanik Formation. Borehole Shuda-Yag-1003: fig. 1, 6-9 - sample 72 (depth 71.9-72.4 m), fig. 2, 3 - sample 68 (depth 73.3-73.5m), fig. 4 - sample 73 (depth 71.4-71.9 m), fig. 5 - sample 29 (depth 105-106 m).
1. Conical spines with three-petalled basal cross-section (1-6).

Fig. 1. Astroentactinia paronae (Hinde), FF-P001/047-08627 (bar=33Ám).
Fig. 2. Borisella pantosompha (Foreman), FF-P001/039-04725 (=17Ám).
Fig. 3. Radiobisphaera menneri Afanasieva, sp. nov., FF-P001/014-04714 (=21Ám).
Fig. 4. Ornatoentactinia klevtsovae Afanasieva, sp. nov., FF-P001/031-08814 (=20Ám).
Fig. 5, 6. Bientactinosphaera variacanthina (Foreman): 5 - FF-P001/015-04401 (=50Ám); 6 - FF-P001/015-08527 (=42Ám).
2. Thin three-edged spines (7, 8)
Fig. 7. Bientactinosphaera grandis (Nazarov), FF-P001/016-08530 (=32Ám).
Fig. 8, 9. Bientactinosphaerapinica Afanasieva, sp. nov.: 8 - FF-P001/045-08504 (=33Ám); 9 - FF-P001/045-08521 (=23Ám).