Skip to content Skip to navigation

Article: A revision of the Triassic to lowest Jurassic dinoflagellate Rhaetogonyaulax

Publication: Palaeontology
Volume: 18
Part: 4
Publication Date: November 1975
Page(s): 847 864
Author(s): Rex Harland, S. Jack Morbey and William A. S. Sarjeant
Addition Information

How to Cite

HARLAND, R., MORBEY, S., SARJEANT, W. A. S. 1975. A revision of the Triassic to lowest Jurassic dinoflagellate RhaetogonyaulaxPalaeontology18, 4, 847–864.

Online Version Hosted By

The Palaeontological Association (Free Access)


A re-evaluation of the dinoflagellate cyst genus Rhaetogonyaulax shows it to have a complex tabulation of 4'-?6', 5a-?6a, 1av, 7', 7c, 7'', 1p, 1pv, 3s, 3''. The archaeopyle is shown to be developed by loss of the epitract anterior to the precingular plate areas. In consequence of recognition of the high degree of intraspecific variability, all specimens examined are attributed to the single species R. rhaetica; the former species R. chaloneri is recognized as an extreme in the morphological range and reduced to varietal status.
PalAss Go! URL: | Twitter: Share on Twitter | Facebook: Share on Facebook | Google+: Share on Google+