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Afanasieva 2000


PLATE 11.
Main three-edged spines of the subfamilies
Entactiniinae, Bientactinosphaerinae, Astroentactiniinae, Helioentactiniinae,
Pseudorotasphaerinae and Spongopolyentactiniinae
Upper Devonian: fig. 1, 2, 4-13 - Middle Frasnian, Domanik Formation; fig. 3 - Famennian. Borehole Shuda-Yag-1003: fig. 1, 2, 8, 11 - sample 73 (depth 71.4-71.9 m), fig. 4, 6, 13 - sample 29 (depth 105-106 m), fig. 5, 9, 10, 12 - sample 72 (depth 71.9-72.4 m), fig. 7 - sample 8 (depth 120.9-124 m); borehole Zapadnaya Lekkeyaginskaya-65: fig. 3 - sample 86g (depth 2460-2467 m).

1. Spines with Y-shaped basal cross-section and leaf-shaped form of side (1-3).
Fig. 1. Entactinia paula Foreman, FF-P001/019-08803 (bar=37Ám).
Fig. 2. Bientactinosphaera variacanthina (Foreman), FF-P001/015-08817 (=42Ám).
Fig. 3. Bientactinosphaera spinofoliacea Nazarov et Afanasieva, sp. nov., FF-P001/094-12822 (=67Ám).

2. Spines with apophyses (4, 5).
Fig. 4, 5. Moskovistella victorialis Afanasieva, sp. nov.: 4 - FF-P001/032-04518 (=15Ám); 5 - FF-P001/032-05130 (=15Ám).

3. Spines with Y-shaped basal cross-section and narrow sabre-shaped form of side (6).
Fig. 6. Russirad kazintsovae Afanasieva, sp. nov., FF-P001/026-04524 (=15Ám).

4. Spines with right-side (7-11) and left-side (12, 13) torsion.
Fig. 7. Astroentactinia paronae (Hinde), FF-P001/047-04013 (=56Ám).
Fig. 8. Helioentactinia unimana (Nazarov), FF-P001/060-08728 (=33Ám).
Fig. 9. Spongentactinella corynacantha Nazarov et Ormiston, FF-P001/061-08625 (=27Ám).
Fig. 10. Bientactinosphaerapinica Afanasieva, sp. nov., FF-P001/045-08604 (=33Ám).
Fig. 11. Radiobisphaera menneri Afanasieva, sp. nov., FF-P001/014-04014 (=37Ám).
Fig. 12, 13. Spongentactinella olafi Afanasieva, sp. nov.: 12 - FF-P001/056-08514 (=67Ám); 13 - FF-P001/056-04322 (=32Ám).