Hostname: page-component-848d4c4894-p2v8j Total loading time: 0 Render date: 2024-06-08T14:00:25.190Z Has data issue: false hasContentIssue false
  • English
  • Français

The Morphology and Systematics of “Didymograptus” fasciculatus Nicholson, 1869

Published online by Cambridge University Press:  01 May 2009

David Skevington
David Skevington
Affiliation:
Department of Geology, University College London, Gower Street, W.C.1.
Get access Rights & Permissions [Opens in a new window]

Abstract

A new description of “Didymograptus” fasciculatus Nicholson, 1869, is given on the basis of specimens from the Skiddaw Slates (Zone of Didymograptus bifidus) some of which are preserved in relief. The uniramous rhabdosomal form is confirmed. The presence of prothecal folds indicates that the species belongs in the family Sinograptidae Mu, 1957, and adoption of the generic name Nicholsonograptus, proposed by Bouček and Přibyl (1951) with “ D. ” fasciculatus as the type species, is recommended. The possibility that Nicholsonograptus fasciculatus is an intraspecific variant of Holmograptus lentus (Törnquist, 1911) is discussed.

Type
Articles
Information
Geological Magazine , Volume 103 , Issue 6 , December 1966 , pp. 487 - 497
Copyright
Copyright © Cambridge University Press 1966

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bouček, B., and Přibyl, A., 1951. Taxonomy and phylogeny of some Ordovician graptolites. Bull. int. Acad. Prague, 52, no. 20, 1–17.Google Scholar
Bulman, O. M. B., 1932. On the graptolites prepared by Holm. 4. New species of Didymograptus and Dicellograptus from öland, with remarks on the development of Dicellograptus. Ark. Zool., bd. 24A, no. 9, 15–21.Google Scholar
Bulman, O. M. B., 1933. Report on the graptolites from the Quitari area. Q. Jl geol. Soc. Lond., 89, 348–353.Google Scholar
Bulman, O. M. B., 1936. On the graptolites prepared by Holm. 7. The graptolite fauna of the Lower Orthoceras Limestone of Hälludden, öland, and its bearing on the evolution of the Lower Ordovician graptolites. Ark. Zool., bd. 28A, no. 17, 1–107.Google Scholar
Bulman, O. M. B., 1950 a. Some didymograptids and associated forms from the Phyllograptus Shales of Tossåsen, Jämtland. Geol. För. Stockh. Förh., bd. 72, 389–396.CrossRefGoogle Scholar
Bulman, O. M. B., 1950 b. On some Ordovician graptolite assemblages of Belgium. Bull. Inst. Sci. nat. Belg., 26, no. 5, 1–8.Google Scholar
Bulman, O. M. B., 1955. Graptolithina with sections on Enteropneusta and Pterobranchia. Treatise on Invert. Palaeo., pt. V, 1–101. Lawrence, Kansas.Google Scholar
Chu, M. T., 1965. New materials cf Sinograptidae. Acta palaeont. sin., 13, no. 1, 94–9 (99–106).Google Scholar
Ekström, G., 1937. Upper Didymograptus Shale in Scania. Sverig. Geol. Unders. Afh., ser. C, no. 403, 3–53.Google Scholar
Elles, G. L., 1898. The graptolite fauna of the Skiddaw Slates. Q. Jl geol. Soc. Lond., 54, 463–539.CrossRefGoogle Scholar
Elles, G. L. and Wood, E. M. R., 1901. A Monograph of British Graptolites. Palaeontogr. Soc, pt. 1, 1–54. London.Google Scholar
Hede, J. E., 1951. Boring through Middle Ordovician—Upper Cambrian strata in the Fågelsång district, Scania (Sweden). Ada Univ. Lond, bd. 46, no. 7, 5–84.Google Scholar
Hsü, S. C, 1934. The graptolites of the Lower Yangtze Valley. Monogr. nat. Res. Inst. Geol., Shanghai, ser. A, 4, 1–106.Google Scholar
Jaanusson, V., 1965. Two multiramous graptoloids from the Lower Didymograptus Shale of Scandinavia. Geol. För. Stockh. Förh., 86, 413–432.CrossRefGoogle Scholar
Kozlowski, R., 1954. Sur la structure de certains Dichograptidae. Acta geol. polon., 4, 423–444 (118–135).Google Scholar
Lemon, R. R. H., and Cranswick, J. S., 1956. Graptolites from Huacar, Peru. Publ. Mus. Hist, nat Prado, ser. C, no. 5, 1–32.Google Scholar
Mu, A. T., 1957. Some new or little known graptolites from the Ningkuo Shale (Lower Ordovician) of Changshan, Western Chekiang. Acta palaeont. sin., 5, no. 3, 369–406 (406–437).Google Scholar
Mu, A. T., 1963. Research in graptolite faunas of Chilianshan. Scientia sin., 12, no. 3, 347–371.Google Scholar
Nicholson, H. A., 1869. On some new species of graptolites. Ann. Mag. nat. Hist., 4, 231–242.CrossRefGoogle Scholar
Nicholson, H. A., 1870. On the British species of Didymograpsus. Ann. Mag. nat. Hist., 5, 337–357.CrossRefGoogle Scholar
Nicholson, H. A. and Marr, J. E., 1895. Notes on the phytogeny of the graptolites. Geol. Mag., 42, 529–539.CrossRefGoogle Scholar
Shotton, F. W., 1935. The stratigraphy and tectonics of the Cross Fell inlier. Q. Jlgeol. Soc. Lond., 91, 639–704.CrossRefGoogle Scholar
Skevington, D., 1965. Graptolites from the Ontikan Limestones (Ordovician) of öland, Sweden. II. Graptoloidea and Graptovermida. Bull. geol. Instn Univ. Upsala, 43, no. 3, 1–74.Google Scholar
Skwarko, S. K., 1962. Graptolites of Cobb River—Mount Arthur Area, North-West Nelson, New Zealand. Trans. R. Soc. N.Z., 1, no. 15, 215–247.Google Scholar