Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-23T22:27:18.484Z Has data issue: false hasContentIssue false
  • English
  • Français

Notes on cystoids

Published online by Cambridge University Press:  01 May 2009

C. R. C. Paul
C. R. C. Paul
Affiliation:
Department of Geology, Indiana University Northwest, Gary, Indiana, U.S.A.
Get access Rights & Permissions [Opens in a new window]

Summary

“Strobilocystites? kearsargensis Stauffer,” a supposed rhombiferan cystoid from the Kennett Formation, Kearsarge, California, is a diploporite cystoid tentatively assigned to Revalocystis Jaekel. This extends the stratigraphic range of the Dactylocystidae into the Silurian and is the first reported occurrence of Dactylocystidae from North America. An unusual specimen of Glansicystis baccata (Forbes) with IL1 represented by two small pentagonal plates is described. Glansicystis had four short ambulacra: I and IV have only one brachiole; II and V may have one to three brachioles.

An isolated echinoderm plate with structures which may represent pectinirhombs is described from the Whipple Cave Formation, Near Lund, Nevada. The structures differ from typical pectinirhombs and are older (Uppermost Cambrian or Basal Ordovician) than any previously described pectinirhombs.

Type
Articles
Information
Geological Magazine , Volume 105 , Issue 5 , October 1968 , pp. 413 - 420
Copyright
Copyright © Cambridge University Press 1968

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

Bassler, R. S. & Moodey, M. W. 1943. Bibliographic and faunal index of Paleozoic pelmatozoan echinoderms. Spec. Pap. geol. Soc. Am., 45.Google Scholar
Bernard, F. 1895. Eléments de paléontologie. Paris.Google Scholar
Jaekel, O. 1899. Stammesgeschichte der Pelmatozoen. 1, Thecoidea und Cystoidea. Berlin.Google Scholar
Kesling, R. V. 1963. Key for the classification of cystoids. Contr. Mus. Paleont. Univ. Mich., 18, 101–116.Google Scholar
Paul, C. R. C. 1967a. The British Silurian cystoids. Bull. Br. Mus. nat. Hist. A (geol.), 13, 297–356.Google Scholar
Paul, C. R. C. 1967b. Diploporita. In Harland, W. B. et al. (Eds.). The Fossil Record. London (Geological Society), 569–570.Google Scholar
Stauffer, C. R. 1930. The Devonian of California. Univ. Calif. Publs geol. Sci., 19, 81–118.Google Scholar
Ubaghs, G. 1963. Cothurnocystis Bather, Phyllocystis Thoral and an undetermined member of the order Soluta (Echinodermata, Carpoidea) in the Uppermost Cambrian of Nevada. J. Paleont., 37, 1133–1142.Google Scholar
Waite, R. H. 1953. Age of the “Devonian” of the Kearsarge Area, California. Bull. geol. Soc. Am., 64, 1521. (abstract).Google Scholar