Packy Posted February 5, 2018 Share Posted February 5, 2018 Has anyone had luck finding instars, or baby trilobites? Packy Link to comment Share on other sites More sharing options...
Miocene_Mason Posted February 5, 2018 Share Posted February 5, 2018 I’ve found very small trilobites (well one and pieces of many tiny ones) but I’m not sure if they are “babies”. How doth one tell? “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Kane Posted February 5, 2018 Share Posted February 5, 2018 1 hour ago, WhodamanHD said: I’ve found very small trilobites (well one and pieces of many tiny ones) but I’m not sure if they are “babies”. How doth one tell? A good question! This just barely scratches the surface, but you can see the growth cycle nicely illustrated here in Ludvigsen, Fossils of Ontario: The Trilobites: 8 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Kane Posted February 5, 2018 Share Posted February 5, 2018 Also, a good introductory reference on the process can be found in Trilobites by H.B. Whittington (Boydell Press, 1992), in the chapter "Growth and Moulting," pp. 41-52. 2 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Rumi Posted February 6, 2018 Share Posted February 6, 2018 I believe it was also Harry Whittington who produced a major publication on silicified trilobites from a locality in Virginia. They were collected from limestone acid residues, and there were large numbers of early instars, beautifully preserved and well illustrated. I regret that I don't have the reference now, but his publication list is probably available online. One of the great experts of trilobite taxonomy! Rumi 1 Link to comment Share on other sites More sharing options...
piranha Posted February 6, 2018 Share Posted February 6, 2018 5 hours ago, Rumi said: I believe it was also Harry Whittington who produced a major publication on silicified trilobites from a locality in Virginia. They were collected from limestone acid residues, and there were large numbers of early instars, beautifully preserved and well illustrated. I regret that I don't have the reference now, but his publication list is probably available online. One of the great experts of trilobite taxonomy! Actually, Harry Whittington had a few large monographs with silicified early growth stage trilobites from Virginia: Whittington H.B. (1941) Silicified Trenton trilobites. Journal of Paleontology, 15(5):492-522 Whittington H.B. (1956) Silicified Middle Ordovician trilobites: The Odontopleuridae. Bulletin of the Museum of Comparative Zoology, 114(5):155-289 LINK Whittington H.B. (1959) Silicified Middle Ordovician trilobites: Remopleurididae, Trinucleidae, Raphiophoridae, Endymioniidae. Bulletin of the Museum of Comparative Zoology, 121(8):371-496 LINK Also, don't forget this important collaboration with William Evitt: Whittington H.B., & Evitt, W.R. (1954) Silicified Middle Ordovician trilobites. Geological Society of America, Memoir, 59:1-137 "Harry Whittington and Bill became firm friends as a result of their mutual interest in trilobites on this excursion. They did more fieldwork together in the summer of 1946, and this collaboration led to two joint publications (Evitt & Whittington 1953; Whittington & Evitt 1954). Furthermore, Harry Whittington had undertaken research on these silicified trilobites, beginning at around the time Bill began his PhD (Whittington 1941)." Riding, J.B. & Lucas-Clark, J. (2016) The life and scientific work of William R. Evitt (1923-2009). Palynology, 40(sup1):2-131 PDF LINK Evitt also authored numerous papers with silicified early growth stage trilobites from Virginia: Evitt, W.R. (1950) Trilobites from the lower Lincolnshire limestone near Strasburg, Shenandoah County, Virginia. PhD Thesis, The Johns Hopkins University, 392 pp. Evitt, W.R. (1951) Some Middle Ordovican trilobites of the families Cheiruridae, Harpidae, and Lichidae. Journal of Paleontology, 25(5):587-616 Evitt, W.R. (1961) Early Ontogeny in the trilobite Family Asaphidae. Journal of Paleontology, 35(5):986-995 Evitt, W.R., & Tripp, R.P. (1977) Silicified Middle Ordovician trilobites from the families Encrinuridae and Staurocephalidae. Palaeontographica Abteilung A, 109-174. Tripp, R.P., & Evitt, W.R. (1981) Silicified Lichidae (Trilobita) from the Middle Ordovician of Virginia. Geological Magazine, 118(6):665-677 Tripp, R.P., & Evitt, W.R. 1986. Silicified trilobites of the Family Asaphidae from the Middle Ordovician of Virginia. Palaeontology, 29(4):705-724 PDF LINK Tripp, R. P., Rudkin, D. M., & Evitt, W.R. (1997) Silicified trilobites of the genus Sphaerocoryphe from the Middle Ordovician of Virginia. Canadian Journal of Earth Sciences, 34(6):770-788 4 Link to comment Share on other sites More sharing options...
Rumi Posted February 7, 2018 Share Posted February 7, 2018 @piranha Wow, excellent!! This is an excellent resource! Living and learning......... Link to comment Share on other sites More sharing options...
Packy Posted February 9, 2018 Author Share Posted February 9, 2018 Thanks all, I will study all the documents. i plan on using acid to look in the local devonion first. Iwill let you all know what I find. Awesome info. packy Link to comment Share on other sites More sharing options...
Arizona Chris Posted February 11, 2018 Share Posted February 11, 2018 Weve found meraspids in the bright angel shale which is Cambrian. But never protaspids. So tiny! ---------------------------------------------------------------------------------------------------------------------------- Arizona Chris Paleo Web Site: http://schursastrophotography.com/fossiladventures.html Link to comment Share on other sites More sharing options...
xraymom7 Posted September 22, 2018 Share Posted September 22, 2018 So glad to have found this post. Trying to Id some .5, 1 and 2 mm "things" in my wheeler shale. Link to comment Share on other sites More sharing options...
ynot Posted September 22, 2018 Share Posted September 22, 2018 11 minutes ago, xraymom7 said: So glad to have found this post. Trying to Id some .5, 1 and 2 mm "things" in my wheeler shale. Post pictures in the fossil ID sub forum. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
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