Missourian Posted September 21, 2013 Author Share Posted September 21, 2013 This chunk may have been worn before burial: Under the microscope.... Area marked in green: Context is critical. Link to comment Share on other sites More sharing options...
Evgeny Kotelevsky Posted September 21, 2013 Share Posted September 21, 2013 Nice chaetetids you've got! I guess, there are many species in genus Chaetetes, but this genus is not well studied... http://evgenykotelevsky.wordpress.com Link to comment Share on other sites More sharing options...
Missourian Posted February 3, 2014 Author Share Posted February 3, 2014 (edited) Cylindrical sponge Spring Hill Limestone Clay County, Missouri Tangential section along long axis: Angled cross section at end (wet): I thought this was Heliospongia, but the spicular structure seems a bit 'delicate', so I'm not sure. Edited February 3, 2014 by Missourian Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted February 3, 2014 Author Share Posted February 3, 2014 Sponge(s) Spring Hill Limestone Clay County, Missouri From the same outcrop as the sponge above.... At first, I thought the tube-like things in the rock here were filled burrows: I took a closer look at the one marked with the arrow: Under the microscope, a network of spicules is quite visible: Some of the other 'tubes': I can't make out any detail in the other 'tubes', so I can't tell yet if they are sponges or not. In the past, I thought this outcrop of Spring Hill was a bit lackluster, but it turns out to have really good preservation of sponges. Context is critical. Link to comment Share on other sites More sharing options...
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