Ludwigia Posted October 25, 2014 Share Posted October 25, 2014 (edited) I was wondering if anybody could help me to identify the genus or at least the family of this brachiopod. I found it on a hike with my brother over Mono Cliffs in southern Ontario last week. I wasn't expecting to find anything, since the lower Silurian dolostone of the Amabel Formation which forms the caprock of the Niagara Escarpment doesn't usually yield much in the way of well preserved fossils, but there it was, somewhat mineralized, but still worth taking home. The stones at a particular level were full of imprints of this one, so I'm supposing it must be relatively common. Any ideas? Edited October 25, 2014 by Ludwigia Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
JimB88 Posted October 25, 2014 Share Posted October 25, 2014 hard to say without size and it being exposed...maybe Rhynchotreta; its known from the Silurian of Ontario Link to comment Share on other sites More sharing options...
piranha Posted October 25, 2014 Share Posted October 25, 2014 Bolton recorded a few possibilities from the Amabel Formation: Rhynchotreta americana - (Colpoy Bay & Eramosa Members) Stegerhynchus indianensis - (Eramosa Member) Stegerhynchus neglectum - (Colpoy Bay & Eramosa Members) Stegerhynchus (?) pisa - (Eramosa Member) Stegerhynchus whitii - (Eramosa & Wiarton Members) Bolton,T.E. (1957) Silurian stratigraphy and Palaeontology of the Niagara Escarpment in Ontario. Geological Survey of Canada Memoir, 289:1-145 Link to comment Share on other sites More sharing options...
Ludwigia Posted October 26, 2014 Author Share Posted October 26, 2014 Thanks, guys. Now we're getting closer. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Shamalama Posted October 26, 2014 Share Posted October 26, 2014 Jim and Scott seem to have narrowed it down for you some. I don't see an obvious sulcus on the shell which makes ID a bit more difficult. What is the size of the shell? -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
Ludwigia Posted October 26, 2014 Author Share Posted October 26, 2014 What is the size of the shell? 2cm. Well, Scott sent me the Bolton paper and now I've narrowed it down to Orthorhyncula, maybe bidwellensis. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
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