trilobite nut Posted April 20, 2014 Share Posted April 20, 2014 (edited) Was cruising the south pit in Arkona today. Met up with Rick and spent the day searching with him. I saw a big slab of limestone and something looked funny, so I started hammering a chisel very delicately. This is what I uncovered and it was enough for me to go back to the van and get the cement saw to cut the rock and bring it home. I'm pretty sure, as is Rick, that it is a placoderm fin...we'll see what else is in there! Edited April 20, 2014 by trilobite nut Link to comment Share on other sites More sharing options...
trilobite nut Posted April 22, 2014 Author Share Posted April 22, 2014 Well, working through the limestone and that ain't no placoderm fin. I have no idea what it is right now. I'll post pics when I'm closer to making it identifiable and ask for assistance in that. Link to comment Share on other sites More sharing options...
Mediospirifer Posted April 22, 2014 Share Posted April 22, 2014 Cool piece! Idunno whatsit? Link to comment Share on other sites More sharing options...
trilobite nut Posted April 24, 2014 Author Share Posted April 24, 2014 (edited) I suppose this post should have gone into the Fossil ID thread. Sorry about that, but I was pretty sure what I had...now, I still am but it ain't what I thought I had...I think...anyway, blasted the limestone away, and found this thing to be much bigger than I thought. Researching, I found the shape, color, texture, species of brachs in the matrix around it, were all very well in line with what I found on page 220 of the book, Strata and Megafossils of the Middle Devonian Silica Formation; Herbertocaris wideneri, which is further described on page 222. I believe that this piece I have may be a piece of the lateral caudal process. It appears the animal had a caudal plate where the process attached to the body. This plate is illustrated to be roughly the shape of one end of this piece I have. Everything else, you will see in the pics. I say Hebertocaris, not only for the factors listed, but the size of the specimen too. Any and all opinions are welcome and valued. Edited April 24, 2014 by trilobite nut Link to comment Share on other sites More sharing options...
Fossildude19 Posted April 24, 2014 Share Posted April 24, 2014 Cool find, Jim! I did't realize phyllocarids got so big! Thanks for posting it. Regards, Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
trilobite nut Posted April 24, 2014 Author Share Posted April 24, 2014 Do you think my assumption is correct as to what it is Fossildude? Link to comment Share on other sites More sharing options...
Guest11596 Posted April 24, 2014 Share Posted April 24, 2014 I'd say Placoderm, Jim; Protitanichthys maybe. 1 Link to comment Share on other sites More sharing options...
trilobite nut Posted April 24, 2014 Author Share Posted April 24, 2014 Yeah, could very well be. Thanks mid...I'll look more into it. Link to comment Share on other sites More sharing options...
Fossildude19 Posted April 24, 2014 Share Posted April 24, 2014 (edited) Sorry Jim, not my area of expertise. It does look like one pic I found of Protitanichthys. >HERE< But, I don't know - most of the placoderm arthrodire bits I've seen have had bumps all over them. But middledevonian is probably more familiar/knowledgeable about your area. I would defer to him in this. Regards Edited April 24, 2014 by Fossildude19 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
trilobite nut Posted April 24, 2014 Author Share Posted April 24, 2014 I saw that pic and right away I noticed huge differences in the "grain" of the two specimens. Of course, fossilization can do funny things in different areas...I trust middevonian to point me in the right direction. He is a mountain of knowledge! Link to comment Share on other sites More sharing options...
Malcolmt Posted April 24, 2014 Share Posted April 24, 2014 Interesting find, would not mind seeing it in person when we meet up. I'll be bringing a few samples of what we are looking for Friday just to wet your appetite ....... Link to comment Share on other sites More sharing options...
nils Posted April 24, 2014 Share Posted April 24, 2014 Hi!This is definitely a piece of fish, the cancellous bone is nice to see.Why do you think, this a piece of a placoderm? For my opinion, it also could be a piece of a bony fish. Cheers, Nils Link to comment Share on other sites More sharing options...
trilobite nut Posted April 27, 2014 Author Share Posted April 27, 2014 The only reason I originally suspected placoderm is if you look at the original picture, before prep out, the exposed part looks remarkably like the shape of the fin. Link to comment Share on other sites More sharing options...
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