May 2019 Invertebrate / Plant Fossil Of The Month Poll

[digit]

Check the entries below carefully and cast your vote! PM me if you notice any errors with the entries.

 

The poll ends June 9th. Be sure to vote in our other FOTM poll, HERE

 

1. Mecaster scutiger echinoid anoxic mortality cluster - Cretaceous, Cenomanian (Tentúgal Fm, I level) - Montemor-o-Velho, Coimbra, Portugal

 

2. Stromatoporid (with bonus nautiloid) - Likely Devonian (formation uncertain) - Champaign, Illinois

 

3. Pleurodictyum americanum (tabulate coral) attached to a crinoid calyx (Megistocrinus?) - Middle Devonian, Moscow Formation - Livingston County, New York

 

4. Echinocaris punctata phyllocarid - Middle Devonian (Givetian), Moscow formation, Hamilton group - Madison county, New York

 

5. Triarthrus eatoni trilobite (ventral view with eggs) - Ordovician - Beecher's Beds, Walcott Quarry, near Rome, New York

 

6. Psammichnites? ichnofossil, molluscan feeding trail - Carboniferous - Kilkee, Ireland

 

7. Coeloma vigil crab - Eocene - Provence, France

 

8. Cenocerus nautiloid - Early Jurassic - Mappleton, Yorkshire, UK

 

[piranha]

15 hours ago, digit said:

6. Psammichnites? ichnofossil, molluscan (or trilobite?) feeding trail - Carboniferous - Kilkee, Ireland

 

 

This is confusing. Psammichnites is not a trilobite trace.  Here is the relevant info (again).

 

Psammichnites is a molluscan trace.

 

Psammichnites records the feeding activities of a subsurface animal using a siphon-like device...  ...The analysis of the meniscate structure and trace boundaries of Carboniferous Psammichnites indicates that sediment was transported backward, through the ventral part and along the sides of the animal, resembling sediment transport in modern molluscs...  ...In short, based on morphologic evidence, the possibility of a molluscan producer for Upper Paleozoic Psammichnites has been clearly reestablished.

 

Mángano, M.G., Buatois, L.A., Rindsberg, A.K. 2002

Carboniferous Psammichnites: systematic re-evaluation, taphonomy and autecology.

Ichnos, 9:1-22  PDF LINK

[digit]

I hedged but will amend.

 

Cheers.

 

-Ken

[piranha]

No need to hedge... the Doyen of Ichnofossils leads the way!

 

Seilacher, A. 2007
Trace Fossil Analysis.
Springer Publishing, 240 pp.

 

[Ludwigia]

On 1.6.2019 at 3:38 AM, digit said:

 

The poll ends May 9th.

 

Just noticed this. I'm sure you meant to type June 9th, right?

[digit]

Typo fixed. Thanks.

 

 

Cheers.

 

-Ken