Planko Posted July 15, 2020 Share Posted July 15, 2020 Hey Everyone, Has anyone found a Eutrephoceras dekayi from NSR? If so, was it only 2mm or smaller in size? I really want one but man my eyes will have a hard time finding it. Planko Link to comment Share on other sites More sharing options...
DPS Ammonite Posted July 15, 2020 Share Posted July 15, 2020 (edited) I found an abstract of an article that says hatchlings were 14 mm across. Landman, N.H., J.W. Grier, J.K, Cochran, J.C. Grier, J. Petersen, and W.H. Towbin. 2017. Nautilid nurseries: Hatchlings and juveniles of Eutrephoceras dekayi from the lower Maastrichtian (Upper Cretaceous) Pierre Shale of east-central Montana. Lethaia [DOI: 10.1111/let.1222] https://onlinelibrary.wiley.com/doi/abs/10.1111/let.12222 Edited July 15, 2020 by DPS Ammonite 1 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Planko Posted July 15, 2020 Author Share Posted July 15, 2020 Interesting. I have been looking through my NSR Collectors Guide Book and has them at 2mm. At 14mm I might be able to see them. Getting old is the pits sometimes. Link to comment Share on other sites More sharing options...
RuMert Posted July 16, 2020 Share Posted July 16, 2020 Nautilus eggs are usually big, which contributed to their survival compared to ammonites My sites & reports Link to comment Share on other sites More sharing options...
Al Dente Posted July 16, 2020 Share Posted July 16, 2020 1 hour ago, Planko said: Interesting. I have been looking through my NSR Collectors Guide Book and has them at 2mm. At 14mm I might be able to see them. Getting old is the pits sometimes. Are you looking for hatchlings only? Adults can be around a half foot across. 1 Link to comment Share on other sites More sharing options...
Al Dente Posted July 16, 2020 Share Posted July 16, 2020 Here’s three E. dekayi living chambers that I found this week in Peedee Formation of North Carolina. 3 Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted July 16, 2020 Share Posted July 16, 2020 Well to your south, I've found many of that species in the 1"-2.5" range. 1 Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
Planko Posted July 16, 2020 Author Share Posted July 16, 2020 Thanks for all the information. It does show them at 2-3mm. Maybe they are juveniles. Link to comment Share on other sites More sharing options...
RuMert Posted July 16, 2020 Share Posted July 16, 2020 Maybe it does show them wrong which is like 100 times more likely? A reference was provided here with 14 mm minimum size. Nautilid hatchlings cannot be small, its their biology My sites & reports Link to comment Share on other sites More sharing options...
Al Dente Posted July 16, 2020 Share Posted July 16, 2020 Any chance they are confusing forams with nautiloids? Some forams look like tiny nautiloids. 3 Link to comment Share on other sites More sharing options...
Planko Posted July 17, 2020 Author Share Posted July 17, 2020 Thanks again. I am okay with them being larger than stated. I also know just because it is printed does not make it absolute. I am actually glad they are larger. I need one for my collection. Smaller, for me, are much harder to find. 1 Link to comment Share on other sites More sharing options...
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