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Afanasieva 2000


PLATE 7.
Main cylindrical and conical spines
of the subfamilies Polyentactiniinae, Astroentactiniinae and Entactiniinae
Upper Devonian, Middle Frasnian, Domanik Formation. Borehole Shuda-Yag-1003: fig. 1, 4 - sample 72 (depth 71.9-72.4 m), fig. 2, 6, 8 - sample 68 (depth 73.3-73.5m), fig. 3 - sample 73 (depth 71.4-71.9 m), fig. 8 - sample 8 (depth 120.9-124 m); the Lyajol River, outcrop no. 1904, sample 6: fig. 5; borehole Ukhtinskaya-3B: fig. 7 - sample 116 (depth 100.6-101 m).

1. Cylindrical spines with additional spines, which formed wide "tension wire" at the base of the spine (1, 2).
Fig. 1. Polyentactinia kossistekensis Nazarov, FF-P001/010-11316 (bar=20Ám).
Fig. 2. Polyentactinia zhamoidai Afanasieva, sp. nov., FF-P001/011-04721 (=20Ám).

2. These spines are conical in the distal part and three-edged in the basal part as a result of forminfg of fasle "tension wire" (3, 4).
Fig. 3. Entactinia diversita Nazarov, FF-P001/040-08828 (=15Ám).
Fig. 4. Moskovistella rozanovi Afanasieva, sp. nov., FF-P001/117-05132 (=15Ám).

3. Very thin cylindrical spines (5-7).
Fig. 5. Haplentactinia alekseevi Afanasieva, sp. nov., FF-P001/038-09621 (=42Ám).
Fig. 6. Borisella mariae Afanasieva, sp. nov, FF-P001/051-04708 (=77Ám).
Fig. 7. Astroentactinia vishnevskayae Afanasieva, sp. nov., FF-P001/034-08907 (=33Ám).
4. Conical spines: curved (8) and straight (9)
Fig. 8. Astroentactinia rusaevi Afanasieva, sp. nov., FF-P001/107-04726 (=20Ám).
Fig. 9. Astroentactinia tikhomirovi Afanasieva, sp. nov., FF-P001/048-04108, (=20Ám).