PLATE 16.
Structura of spines of the subfamilies
Retentactiniinae, Polyentactiniinae, Entactiniinae and Astroentactiniinae
Upper Devonian, Middle Frasnian, Domanik Formation. The Lyajol River, outcrop no. 1904, sample 6: fig. 1; borehole Shuda-Yag-1003: fig. 2 - sample 73 (depth 71.4-71.9 m), fig. 3, 9 - sample 72 (depth 71.9-72.4 m), fig. 4, 5 - sample 8 (depth 120.9-124 m), fig. 6 - sample 68 (depth 73.3-73.5m), fig. 8 - sample 28 (depth 106-107 m), the Domanik River, outcrop 21, sample 38: fig. 7.
1. Cylindrical spines with round basal cross-section (1-7)
Fig. 1, 2. Tetragregnon quadrispinosa (Foreman): 1 - FF-P001/001-09807 (bar=7µm); 2 - FF-P001/001-08703 (=7µm).
Fig. 3. Borisella primitiva Afanasieva, holotype, FF-P001/131-08408 (=7µm).
Fig. 4, 5. Polyentactinia kossistekensis Nazarov: 4 - FF-P001/010-04007 (=7µm); 5 - FF-P001/010-04003 (=7µm).
Fig. 6. Polyentactinia zhamoidai Afanasieva, sp. nov., FF-P001/011-04721 (=7µm).
Fig. 7. Moskovistella viatoria Afanasieva, sp. nov., FF-P001/021-13106 (=42µm).
2. Conical spines with subsquare basal cross-section (8, 9)
Fig. 8. Astroentactinia biaciculata Nazarov, FF-P001/049-04209 (=7µm).
Fig. 9. Astroentactinia paronae (Hinde), FF-P001/047-08627 (=7µm). |
