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4 results for “Thelodus”
FIG. 20. — Thelodus matukhini n in Upper Silurian thelodonts from Severnaya Zemlya Archipelago (Russia)
FIG. 20. — Thelodus matukhini n. sp., morphological set of scales; A-C, head scales; D-G, transitional scales; H-S, trunk scales; T, pugniformis-type of the scale; A-C, D1, E-H, I1, J-O, P2, Q, R2, S, T1, scales in crown view; D2, scale in base view; I2, P1, R1, T2, scales in lateral view; LIG 35-281-LIG 35-300; sample 18041-14, Komsomolets Island, Ludlow, Upper Silurian. Scale bar: 0.3 mm.
FIG. 17. — Thelodus visvaldi n in Upper Silurian thelodonts from Severnaya Zemlya Archipelago (Russia)
FIG. 17. — Thelodus visvaldi n. sp.; A, head scale; B, D-I, K-O, trunk scales; C, fin scale?; J, scale of unknown position; A-D, F-J, M-O, scales in crown view; E, N, scales in oblique lateral view; K, scale in lateral view; L, scale in base view; A, Pi 7541; B, Pi 7556; C, Pi 7549; D, E, Pi 7544; F, Pi 7542; G, LIG 35-903, the scale is lost; H, LIG 35-904; I, Pi 7545; J, Pi 7559; K, LIG 35-905; L, LIG 35- 906; M, Pi 7553; N, Pi 7554; O, Pi 7555; A-F, I, J, M-O, MF 34-1, Cape October, October Revolution Island; G, H, K, L, 5m-1, Pioneer Island; Ludlow, Upper Silurian. Scale bars: A-C, F-K, M-O, 0.1 mm; D, E, L, 0.2 mm.
FIG. 2. — A-I, Thelodus matukhini n in Upper Silurian thelodonts from Severnaya Zemlya Archipelago (Russia)
FIG. 2. — A-I, Thelodus matukhini n. sp., scales in crown view; A, LIG 35-859; B, holotype, LIG 35-860; C, LIG 35-861; D, LIG 35- 862; E, Pi 7552; F, Pi 7550; G, Pi 7547; H, Pi 7551; I, Pi 7557; A-D, sample 18041-14, Komsomolets Island, Ludlow, Upper Silurian; E-I, sample MF 34-1, cape October (Octyabrskij), October Revolution Island, Ludlow, Upper Silurian; J-Q, Loganellia cuneata (Gross, 1947); J, L, O-Q, scales in crown view; K, M, scales in oblique lateral crown view; N, a scale in lateral view; J-Q, LIG 35-863- LIG 35-870; sample 2-23, Matusevich River, October Revolution Island, Ust-Spokojnaya Formation, Ludlow, Upper Silurian. Scale bars: A, C, E-H, J-P, 0.1 mm; B, D, I, Q, 0.2 mm.
FIG. 15. — Thelodus calvus n in Ordovician and Lower Silurian thelodonts from Severnaya Zemlya Archipelago (Russia)
FIG. 15. — Thelodus calvus n. sp., microstructure of the scales; A, Pi 7631; B, Pi 7632; C, D, Pi 7633; E, Pi 7634; F, Pi 7635; G, Pi 7636; sample MF 46-23, Ushakov River, October Revolution Island, Samojlovich Formation, Wenlock, Lower Silurian. Abbreviations: asp, aspidine "pegs" in the base; b, base; cr, crown; dc, dentine canal; dt, dentine tubules; n, neck, pc, pulp canal; pcv, pulp cavity. Scale bars: 0.1 mm.
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