Hostname: page-component-745bb68f8f-l4dxg Total loading time: 0 Render date: 2025-01-13T12:34:41.925Z Has data issue: false hasContentIssue false
  • English
  • Français

The Structure of Oncograptus T. S. Hall

Published online by Cambridge University Press:  01 May 2009

O. M. B. Bulman
O. M. B. Bulman
Affiliation:
Sedgwick Museum, Cambridge
Get access Rights & Permissions [Opens in a new window]

Extract

The genus Oncograptus was founded by T. S. Hall (1914, p. 109) with the species Oncograptus upsilon T. S. Hall as type. The original definition reads: “Hydrosome at first biserial, but later dividing into two uniserial branches. Thecae long, narrow, and slightly curved. The form of the genus is quite different from that of any other graptolite. The form of the thecae and the great width of the branches seem to remove it from the Dicranograptidae.” In the same description Hall remarks upon the resemblance of the thecae to those of Isograptus (Didymograptus) caduceus, and observes that concrescence of the branches of D. caduceus would result in the formation of a rhabdosome “somewhat similar” to Oncograptus.

Type
Original Articles
Information
Geological Magazine , Volume 73 , Issue 6 , June 1936 , pp. 271 - 278
Copyright
Copyright © Cambridge University Press 1936

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

Elles, G. L., 1922. “The Graptolite Faunas of the British Isles,” Proc. Geol. Assoc.,xxxiii, 168–200.Google Scholar
Hall, T. S., 1914. “Victorian Graptolites, Pt.IV,,” Proc. Roy. Soc. Victoria, xvii, 104–118.Google Scholar
Harris, W. J., 1916. “The Palaeontological Sequence of the Lower Ordovician Rocks in the Castlemaine District,” Proc. Roy. Soc. Victoria xxix, 50–74.Google Scholar
Proc. Roy. Soc. Victoria Harris, W. J., 1924. “Victorian Graptolites (New Series), Pt. I,” Proc. Roy. Soc. Victoria, xxxvi, 92–106.Google Scholar
Proc. Roy. Soc. Victoria Harris, W. J., 1926. “Victorian Graptolites (New Series), Pt. II,” Proc. Roy. Soc. Victoria, xxxviii, 55–61.Google Scholar
Proc. Roy. Soc. Victoria Harris, W. J., 1933. “Isoqraptus caduceus and its allies in Victoria,” Proc. Roy. Soc. Victoria, xlvi, 79–114.Google Scholar
Stubblefield, C. J., 1929. “Notes on some Early British Graptolites,” Geol. Mag.,LXVI, 268–285.Google Scholar