erose Posted May 12, 2013 Share Posted May 12, 2013 (edited) I am trying to get a better handle on the difference between Hebertella occidentalis and H. alveata. One publication suggests that H. alveata has a "sulcus in its dorsal valve that runs to the anterior margin and has a long ventral inter area". Do any of you Upper Ordovician collectors have examples you feel confidant identifying? Edited May 12, 2013 by erose Link to comment Share on other sites More sharing options...
piranha Posted May 12, 2013 Share Posted May 12, 2013 Did you get a chance to look at these papers: Klingensmith, B.C. (2011) GIS Based Biogeography of Cincinnatian (Upper Ordovician) Brachiopods with Special Reference to Hebertella. Ohio University, Geological Sciences MSc Thesis 134 pp. LINK Walker, L.G., & Pojeta, J. (1982) The Brachiopod Genera Hebertella, Dalmanella, and Heterorthina from the Ordovician of Kentucky: A Taxonomic Study of Nine Species and Their Stratigraphic Distribution in the Lexington Limestone and Younger Ordovician Rocks. USGS Professional Paper 1066-M:1-17 LINK Link to comment Share on other sites More sharing options...
squalicorax Posted May 13, 2013 Share Posted May 13, 2013 This may be the sulcus you are looking for here is occidentalis My Flickr Page of My Collection: http://www.flickr.com/photos/79424101@N00/sets Link to comment Share on other sites More sharing options...
erose Posted May 13, 2013 Author Share Posted May 13, 2013 Very helpful! Thanks guys. Link to comment Share on other sites More sharing options...
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