Ludlow and Pridoli (Upper Silurian) graptolites from the by Alfred C. Lenz, Anna Kozłowska-Dawidziuk, National Research

By Alfred C. Lenz, Anna Kozłowska-Dawidziuk, National Research Council Canada. Monograph Publishing Program

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Additional resources for Ludlow and Pridoli (Upper Silurian) graptolites from the Arctic Islands, Canada

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9, figs. 5a, b. 1936 Monograptus dubius ludlowensis Bou…ek; p. 139, pl. 1, figs. 8–10. 1953 Monograptus dubius (Suess); Walker, p. 365, figs. 2, 3. 1955 Monograptus dubius (Suess); Kühne, p. 360, figs. 2A– K. 1958 Pristiograptus dubius (Suess); Urbanek, p. 83, text-fig. 57; pl. 5, fig. 1, 2; text-pl. 7. 1959 Monograptus dubius thuringicus Jaeger; p. 127, pl. 11, figs. 3–7. Type. Graptolithus dubius Suess, 1851, p. 115, pl. 9, figs. 5a, b. From the middle Wenlock of the Barrandian region, Czech Republic.

Nevertheless, more detailed study is required to understand the fundamental morphology of the genus. 22 Ludlow and Pridoli (Upper Silurian) Graptolites from the Arctic Islands, Canada Plectograptus robustus (Obut and Zaslavskaya, 1983) Pl. 24, figs. 1–3, 7; Pl. 26, figs. 3, 4, 8, 9, 11–14 1983 Agastograptus robustus n. ; Obut and Zaslavskaya, p. 108, pl. 24, figs. 1–3. 1986 Agastograptus robustus Obut and Zaslavskaya; Obut and Zaslavskaya, p. 210, figs. a–c. 2002 Plectograptus robustus (Obut and Zaslavskaya), Koz»owska-Dawidziuk, p.

7– 10; pl. 50, figs. 1–5; text-figs. 4b–g. cf. 1986 Monograptus beatus Koren’; Koren’, p. 91, pl. 18, figs. 4–6; figs. 12a–i. 1990 Monograptus cf. beatus Koren’; Lenz, figs. 4T, U. cf. 1998 Monograptus beatus Koren’; Ni, Lenz and Chen, figs. 3K, 6B, G. Type. CGM 12/10876; pl. 49, fig. 7, text-fig. 4b, from the bouceki Biozone of Kazakhstan. Study material. Two flattened specimens only moderately preserved; tentatively identified from TC 88, 195 m. Previously figured in Lenz (1990). Discussion. Monograptus beatus was tentatively identified on the strength of two specimens from the Arctic (Lenz 1990), only one of which preserved the proximal end of the rhabdosome.

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