Home › nanno-taxonomy › Nannoliths › Sphenolithaceae › Sphenolithus › S. abies group

Revision of S. abies group from Sun, 16/03/2008 - 00:15

Sun, 30/03/2008 - 19:13 — Jeremy Young
Citation: 
Sphenolithus abies group

Description: Sphenoliths without prominent apical spines.

Species included:

6-2abies.JPG abies.jpg S. abies - cuspate outline, with apcal elements elongated into compound spine caNN7 - NN15
6-5conicus.JPGconicus.jpg S. conicus - with small apical spine Oligocene - NN3
6-15disbelemnos.JPGdisbelemnos.jpg S.disbelemnos -simlar to S. belemnos butwith very small apical spine NN2-3
6-9dissilimis.JPGdissimilis.jpg S. dissimilis - Similar to S. moriformis but with apical cycle of elements extended to form circlet of spines Oligocene - NN3
6-6moriformis.JPGmoriformis_(well_preserved).jpg S. moriformis - beehive shaped Eocene - NN10

Species in this group are poorly defined and of very limited biostratigraphic value.

Post new comment

The content of this field is kept private and will not be shown publicly.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
  • Use <bib>...</bib> to insert automatically numbered references.
  • You may quote other posts using [quote] tags.
  • Glossary terms will be automatically marked with links to their descriptions. If there are certain phrases or sections of text that should be excluded from glossary marking and linking, use the special markup, [no-glossary] ... [/no-glossary]. Additionally, these HTML elements will not be scanned: a, abbr, acronym, code, pre.
  • Insert Google Map macro.

More information about formatting options

Scratchpads developed and conceived by: Vince Smith, Simon Rycroft & Dave Roberts