Jones1rocks Posted December 18, 2015 Share Posted December 18, 2015 This large specimen was identified long beforeI acquired it, as simply a jellyfish. Supposedly, and I have no reason to doubt it, it is from Pit 11, Mazon Creek. Does anyone have an idea on the particular jellyfish it might be? The small concretion (also Mazon Creek) carried no identification whatsoever, although I'm inclined to believe it could be either an Octomedusa pieckorum or Reticulomedusa Greenei. Any thoughts on this one? Thank you! Link to comment Share on other sites More sharing options...
ZiggieCie Posted December 18, 2015 Share Posted December 18, 2015 Very interesting, and very good photos. Link to comment Share on other sites More sharing options...
fossilized6s Posted December 19, 2015 Share Posted December 19, 2015 (edited) Your first fossil is actually a big blob of calcified coprolite. Your second is a Reticulomedusa greenei. Octomedusa only have eight tentacles (hence the 'octo'). Haha That is an uncommon Jelly. Neat. Edited December 19, 2015 by fossilized6s 3 ~Charlie~ "There are those that look at things the way they are, and ask why.....i dream of things that never were, and ask why not?" ~RFK ->Get your Mosasaur print ->How to spot a fake Trilobite ->How to identify a CONCRETION from a DINOSAUR EGG Link to comment Share on other sites More sharing options...
Rob Russell Posted December 19, 2015 Share Posted December 19, 2015 I agree with Charlie's assessment. You could soak your first specimen in vinegar for several minutes, and then softly scrub it with a soft brush in effort to remove the calcite that's covering the majority of the nodule. In doing so you may reveal more clues for a positive ID. Like Charlie mentioned, it looks more like a corpolite than a jellyfish as it sits, IMO. 1 Finding my way through life; one fossil at a time. Link to comment Share on other sites More sharing options...
RCFossils Posted December 20, 2015 Share Posted December 20, 2015 I agree with Charlie's identification. The first is a coprolite but does not appear to be from Pit Eleven. It is from the Mazon Creek deposit but from one of the Braidwood pots. Most likely Pit One or Four. The Reticulomedusa is a very nice example of a rare jellyfish. 1 Link to comment Share on other sites More sharing options...
Jones1rocks Posted December 20, 2015 Author Share Posted December 20, 2015 Thanks to you all! Very helpful information, and I appreciate it! Link to comment Share on other sites More sharing options...
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