aek Posted September 29, 2017 Share Posted September 29, 2017 Hi, I found this fossil last year on a trip to the Starved Rock Clay Pit. I didn't find out what it was until just recently: a spine from a shark/eel-like creature called Listracanthus. My question is what is on the other side? Looks like a zig-zaggy impression of some sort. Thanks for any help. Link to comment Share on other sites More sharing options...
aek Posted September 29, 2017 Author Share Posted September 29, 2017 Another view.. Link to comment Share on other sites More sharing options...
Fossildude19 Posted September 29, 2017 Share Posted September 29, 2017 Welcome to the Forum. Cool fish spine! Your other item looks like a fish scale, to me. Maybe something akin to Strepsodus? 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...
Missourian Posted September 29, 2017 Share Posted September 29, 2017 I was thinking it's just a calcite-filled fracture, but I'm hoping for a huge fish scale. 1 Context is critical. Link to comment Share on other sites More sharing options...
Xiphactinus Posted September 29, 2017 Share Posted September 29, 2017 Conularia? Link to comment Share on other sites More sharing options...
FossilDAWG Posted September 29, 2017 Share Posted September 29, 2017 That Listracanthus spine is amazing! Don Link to comment Share on other sites More sharing options...
caldigger Posted September 29, 2017 Share Posted September 29, 2017 If that thing is a scale, it would have been one scary sized fish! I know it's been more than an hour after I ate, but I'm still staying out of the water!!! Link to comment Share on other sites More sharing options...
Nimravis Posted September 29, 2017 Share Posted September 29, 2017 12 minutes ago, caldigger said: If that thing is a scale, it would have been one scary sized fish! I know it's been more than an hour after I ate, but I'm still staying out of the water!!! Lol- Link to comment Share on other sites More sharing options...
TqB Posted September 30, 2017 Share Posted September 30, 2017 17 hours ago, Xiphactinus said: Conularia? I was wondering about conulariid too, there are patches that look really rod like but it's unusually flattened for one. There are possible corners and centre lines though... Tarquin Link to comment Share on other sites More sharing options...
doushantuo Posted September 30, 2017 Share Posted September 30, 2017 Conulariid,based on outer morphology. Link to comment Share on other sites More sharing options...
Fossildude19 Posted September 30, 2017 Share Posted September 30, 2017 That would have been a huge conulariid. My thought was Rhizodont of some kind, which would not be out of the realm of possibility, size wise. But, @Missourian may have a point about calcite. 1 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...
TqB Posted September 30, 2017 Share Posted September 30, 2017 Just now, Fossildude19 said: That would have been a huge conulariid. A good size but well within normal range. 1 Tarquin Link to comment Share on other sites More sharing options...
TNCollector Posted September 30, 2017 Share Posted September 30, 2017 I vote flattened conulariid. I have found some nearly three times that size in different localities. Link to comment Share on other sites More sharing options...
aek Posted September 30, 2017 Author Share Posted September 30, 2017 Thanks for all the replies on this enigmatic fossil. My initial thought was some sort of plant impression, as plant material can also be found at this location although I'm not sure if in the same black shale layer. I can see it could possibly be a flattened conulariid , and if so, makes a doubly intriguing specimen featuring two odd and poorly understood faunas. Link to comment Share on other sites More sharing options...
doushantuo Posted October 1, 2017 Share Posted October 1, 2017 I might have posted this before,dunno: protected,so no outtake recommended,of course it covers ground similar to: simovanitnconularitaphonjt009web.pdf Link to comment Share on other sites More sharing options...
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