Sphenolithus moriformis

Edited by Lyndsey on Thu, 10/03/2011 - 13:34

Sphenolithus moriformis (Bronnimann and Stradner, 1960) Bramlette and Wilcoxon, 1967 [Nannoturbella]

Description: Beehive shaped sphenolith, apical elements not in extinction in vertical poition. No spine, upper and lower parts of similar size.

Remarks: Lower and Middle Miocene sphenoliths are highly variable and S. moriformis is something of a bucket identification.

Size: 3-8 microns (size varies considerably between samples, but there have been no systematic studies)

Original description:

Synonym: S. pacificus Martini, 1965.

Variant: S. compactus Backman, 1980 - small form.

Geological Time Data

Geological Time Periods:

NN10

Eocene

Biblio Reference:

Young, JR. 1998. Neogene. Calcareous nannofossil biostratigraphy. :225-265.

Nannotax Enabling nannofossil research