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Wayne Davey posted a new specimen. 6 years, 10 months ago
6 years, 10 months ago6 years, 10 months agoWayne Davey has contributed specimen mFeM 52280 to myFOSSIL!
Wayne Davey posted a new specimen. 6 years, 10 months ago
Wayne Davey has contributed specimen mFeM 52280 to myFOSSIL!
Hi, @wayne-davey – what is this fossil? It appears to be rather small? My first impression was a trilobite fragment but that’s simply guess work! Do you have another image with a scale bar or a way to indicate the length of the longest axis?
You can use macrostrat to narrow down on the rock type and name in the area: https://macrostrat.org/map/#/z=11.4/x=-78.3372/y=39.0094/bedrock/lines/
Talk to you soon,
Jen
Hi Jen
Yes it is a silicified trilobite, and enrolled, again microscopic and also from Locality 2, Strasburg Va. I have yet to determine the species, it could be a Tretaspis. That’s only a guess. Immature specimens are hard to tell.
Wayne
The specimen is a juvenile, likely Merapsid
Wow! Thank you for sharing! I’ll have to get some of my arthropod friends to join myFOSSIL so they can help us narrow down these IDs. I know Rob Swisher was working on ontogenetic variation in trilobites not long ago but he has moved on to echinoids last I heard. I’ll try to touch base with him when I see him in Arizona next month.
You are very welcome Jen
I’m a little rusty on the material from Strasburg. I tend to collect there in the Fall and work on it during the winter, it carries me through most of the bad weather days in the Winter.
Most days, in all seasons I collect eurypterids and related material at Ridgemount Quarries in Fort Erie Ontario. They allow me unlimited access. In return we use specimens in their Primary and Secondary school educational programs with exceptional specimens offered gratis to the ROM.
2 unnamed species of worm, a phyllocarid, and possible pterobranch have turned up in the last year or so.
Wayne