INA16 Athens - September 2017

Trochoaster martinii

Short diagnosis: Hexradiate with distinct free rays, all 6 rays similar,  ridge runs along length of rays

Taxonomy:

Farinacci & Howe catalog pages: Trochoaster martinii *

Short diagnosis: Hexradiate with distinct free rays, all 6 rays similar,  ridge runs along length of rays

Geological Range:
Last occurrence (top): within Early Miocene Sub-Epoch (15.97-23.03Ma, top in Burdigalian stage). Data source: original description
First occurrence (base): within Early Miocene Sub-Epoch (15.97-23.03Ma, base in Aquitanian stage). Data source: original description

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Interpret with caution & read these notes
• Taxon plotted: , synonyms included - No occurrences of Trochoaster martinii recorded in Neptune database Parent: Lithostromation

Nannotax3 - Coccolithophores - Trochoaster martinii by: Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 29-6-2017

Weblink to this page: ina.tmsoc.org/Nannotax3/link.php?taxon=Trochoaster_martinii Cite this page - citation notes

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Ines Galovic (CGS, Croatia)

It looks like Actiniscus pentasterias (Ehrenberg) Ehrenberg.

23rd October 2015 11:28am

Jeremy Young (UCL, UK)

Indeed Actiniscus and Trochoaster can look really similar in SEM - but of course in LM there is no problem to separate them, as Actiniscids are siliceous

4th December 2015 8:28pm

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