Plantguy Posted August 13, 2017 Share Posted August 13, 2017 Guessing this is a invert burrow of some sort. Surface find Sarasota Cnty, Florida. Unknown age/formation. Mio-Plio-Pleistocene. Interesting striations encircle the specimen that are at an angle to the overall length of the tear drop shaped specimen. Wondering if anyone knows what ichnogenus this might be and who/what created it. I've seen a few of these over the years but this is the best example I have. Thanks. Regards, Chris Link to comment Share on other sites More sharing options...
Rockwood Posted August 13, 2017 Share Posted August 13, 2017 Finding an exposed layer with the same stratification would shoot the whole idea down pretty quick though. Could be just the way the stuff tumbles. Link to comment Share on other sites More sharing options...
westcoast Posted August 13, 2017 Share Posted August 13, 2017 Very interesting ichnofossils. They look like they are from the Glossifungites ichnofauna but what exactly I don't know. Link to comment Share on other sites More sharing options...
doushantuo Posted August 13, 2017 Share Posted August 13, 2017 Ichnofauna or ichnofacies,WC? Slightly Rhizocorallum-like vibe Link to comment Share on other sites More sharing options...
westcoast Posted August 13, 2017 Share Posted August 13, 2017 Yes, Ichnofacies is what I meant. Link to comment Share on other sites More sharing options...
Rockwood Posted August 13, 2017 Share Posted August 13, 2017 Doesn't the term ichnofacies refer to the an associated environment rather than the fossil ? Link to comment Share on other sites More sharing options...
Doctor Mud Posted August 13, 2017 Share Posted August 13, 2017 42 minutes ago, Rockwood said: Doesn't the term ichnofacies refer to the an associated environment rather than the fossil ? An ichnofacies is a distinctive ichnofauna or assemblage of ichnofauna, this may then be used to infer environment. Link to comment Share on other sites More sharing options...
Rockwood Posted August 13, 2017 Share Posted August 13, 2017 Almost like a wave particle relationship maybe ? Neither side of the equation would stand on it's own ? Link to comment Share on other sites More sharing options...
Doctor Mud Posted August 13, 2017 Share Posted August 13, 2017 10 hours ago, Rockwood said: Almost like a wave particle relationship maybe ? Neither side of the equation would stand on it's own ? I guess you are right in that you need an environment for the ichnofauna to live in. The way I think if it is that the ichnofacies is an assemblage of inchnofauna commonly found together. It is s tangible thing. An ichnofacies may be representative of a certain type of environment. The question might be how do we independently determine environment to " calibrate" our ichnofacies - perhaps by using other information such as forams or sedimentology? An ichnofacies can then be used more rapidly to estimate paleoenvironment. Link to comment Share on other sites More sharing options...
Plantguy Posted August 13, 2017 Author Share Posted August 13, 2017 Thanks gang. Glossifungites ichnofacies makes sense and I should do some more poking around in the literature. I need to go look into Rhizocorallum as well. I should have also mentioned that there are other examples of traces/borings and other invert molds/casts only (no actual shell material remains) and some ray/shark material and vertebrate bits --I'll have to get some photos and will share later to add to the context. Unfortunately this find is a surface find in truck fill so there is no stratigraphy to compare or sample from--typical of many florida locales. More later. thanks! Regards, Chris Link to comment Share on other sites More sharing options...
abyssunder Posted August 13, 2017 Share Posted August 13, 2017 I'm pretty sure it's not Rhizocorallium. My guess would be Teredolites, or in extreme case Gastrochaenolites. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Plantguy Posted August 13, 2017 Author Share Posted August 13, 2017 Thanks Lori. sounds good. Here's a shot of the variety of other material that this specimen was found with. There are a number of smooth burrow tube types as shown in the lower left of the photo. There are some shrimp burrows there as well. In addition to the shark material and ray small bits I was pleased to find a tiny sawfish tooth! Regards, Chris Link to comment Share on other sites More sharing options...
Carl Posted August 14, 2017 Share Posted August 14, 2017 I'm 100% with Abyssunder. Link to comment Share on other sites More sharing options...
Plax Posted August 14, 2017 Share Posted August 14, 2017 boring clam (in other words I'm with Abyss and Carl) Link to comment Share on other sites More sharing options...
abyssunder Posted August 14, 2017 Share Posted August 14, 2017 Pretty nice finds, Chris, and good pictures! The shrimp burrows look like the nice one you've sended to me, and I thank you for that and for the other excellently preserved fossils. I would like to compare the first specimen you've posted with the sample from R. G. Bromley et al.1984. A Cretaceous woodground: the Teredolites ichnofacies. Journal of Paleontology, 58(2):488-498, because of the good resemblance, but I can't decide between the two types of ichnofacies: Teredolites or Glossifungites. Maybe some of the specimens posted belong to different ichnofacies. What I could say with certainty, is that they belong to boring bivalves. Gastrochaenolites picture from here " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Plantguy Posted August 17, 2017 Author Share Posted August 17, 2017 On 8/14/2017 at 3:14 PM, Carl said: I'm 100% with Abyssunder. On 8/14/2017 at 3:25 PM, Plax said: boring clam (in other words I'm with Abyss and Carl) On 8/14/2017 at 5:59 PM, abyssunder said: Pretty nice finds, Chris, and good pictures! The shrimp burrows look like the nice one you've sended to me, and I thank you for that and for the other excellently preserved fossils. I would like to compare the first specimen you've posted with the sample from R. G. Bromley et al.1984. A Cretaceous woodground: the Teredolites ichnofacies. Journal of Paleontology, 58(2):488-498, because of the good resemblance, but I can't decide between the two types of ichnofacies: Teredolites or Glossifungites. Maybe some of the specimens posted belong to different ichnofacies. What I could say with certainty, is that they belong to boring bivalves. Gastrochaenolites picture from here Thanks Carl/Don. Lori appreciate the additional info! You all have it nailed..good deal! Yep there are different facies represented with what I've collected. So I bounced the1st photos and these additional ones below off Roger Portell up at UFNat Hist Museum. He's confirmed they were made by Lithophaga the boring clam (aka in ichno taxa terms the striated one is Teredolites isp.). I didnt see it originally but under some closer inspection of the others I noticed that in the smooth lined boring on the right you can actually see the culprit was entombed at the very top of it! He pointed out that you can see the internal mold of the clam (shell missing) and the lined borehole (probably one that bored into a coral which has dissolved away). So Very cool! Thanks guys for taking a look and the help! Regards, Chris Link to comment Share on other sites More sharing options...
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