PJ68 Posted May 29, 2015 Share Posted May 29, 2015 If I'm correct the larger fossil is a sawfish rostral tooth root? What has me stumped is the second item. Link to comment Share on other sites More sharing options...
PJ68 Posted May 29, 2015 Author Share Posted May 29, 2015 Another pic Link to comment Share on other sites More sharing options...
PJ68 Posted May 29, 2015 Author Share Posted May 29, 2015 is this a section of jaw? Link to comment Share on other sites More sharing options...
jpc Posted May 29, 2015 Share Posted May 29, 2015 On the last one, it is out of focus, but it looks like a fish jaw piece form here. Link to comment Share on other sites More sharing options...
PJ68 Posted May 29, 2015 Author Share Posted May 29, 2015 This should be clearer Link to comment Share on other sites More sharing options...
fossilized6s Posted May 30, 2015 Share Posted May 30, 2015 is this a section of jaw? It's funny the first pic looks like a crab leg. Then the underside looks like fish material. JP, does that wide spacing look right for a fish mandible? ~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...
FossilDAWG Posted May 30, 2015 Share Posted May 30, 2015 The "jaw" might be a finger of a Hoploparia lobster claw. Also the "sawfish rostral tooth root" has the look of an Enchodus palatine fang to me. No idea on the "mystery item". Don Link to comment Share on other sites More sharing options...
Diceros Posted May 30, 2015 Share Posted May 30, 2015 FossilDAWG - You're close on the T-shaped specimen: it's a fang of the sabre-toothed fish Enchodus petrosus Cope, 1874, but it's the lower (ant. dentary) fang (attached to a bit of the dentary), not the upper (palatine) fang. I agree with PJ68 that it's a jaw frag. of a bony fish, and not a sm. lobster claw. A lobster claw wouldn't have the tiny row of lat. teeth that this rt. dentary jaw frag. has (also, it looks like bone, and not calcified chitin). You know, just for grins, PJ68, you might try to see if the narrow (ant.) end of the jaw frag. fits with one end of the dentary part of the lw. fang (stranger things have happened). By the way, the specimen above the shiny Everglades quarter (nice as it is, a ruler would be easier to use for scale), is an isolated toothplate tooth of the pycnodont bony fish Anomoeodus latidens, seen in basal view. On to the more obscure mystery item. It's two cylindrical shipworm (Fam. Teredinidae) boring fillings filled with phosphate. The V-shape's fortuitous - the little clams chew through driftwood parallel to the grain of the wood, to make it easier to bore, and two just came very close. The trace fossil name is Teredolites longissimus, and it's considered a feeding trace. There's a fuller discussion of the two main types of feeding and dwelling traces made by small boring clams here: http://www.thefossilforum.com/index.php?/topic/54798-need-help-on-a-few-finds-from-yorktown-and-surry-va/ Generally, when you see Ter. lon. in the Lt. Cret., it's cylindrical borings (often with a rounded end) made in wood which was later phosphatized (permineralized with phosphate, like fluorapatite). These two, however, just have a coating of more phosphate, I don't know why. Frankly, there aren't that many common trace fossils in the NJ Cret., so they're worth knowing. Link to comment Share on other sites More sharing options...
PJ68 Posted May 30, 2015 Author Share Posted May 30, 2015 Thank you for all the info Diceros! I made the mistake of comparing the one piece to a sawfish rostral I already had and just assumed it was the same just supersized I still have much to learn. Thanks again, Pete Link to comment Share on other sites More sharing options...
Al Dente Posted May 30, 2015 Share Posted May 30, 2015 Thank you for all the info Diceros! I made the mistake of comparing the one piece to a sawfish rostral I already had and just assumed it was the same just supersized I still have much to learn. Thanks again, Pete 20150530_133045-1.jpg 20150530_133009-1.jpg It is a large Ischyrhiza rostral fragment. I think the first photo of it didn't show much detail but the other photos do. Link to comment Share on other sites More sharing options...
abyssunder Posted May 30, 2015 Share Posted May 30, 2015 And this is in our database...http://www.thefossilforum.com/index.php?/gallery/image/15546-ischyrhiza-rostral/ " 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...
frankh8147 Posted May 30, 2015 Share Posted May 30, 2015 1. Enchodus tooth with jaw fragment 2.Ischyrhira (sawfish) rostral fragment. The free-matrix aspect of Big Brook fossils can make it tough to ID but it's definitely that. 3. Awesomeness! Really nice bony-fish jaw frag! Link to comment Share on other sites More sharing options...
Diceros Posted May 31, 2015 Share Posted May 31, 2015 Two small clarifications. First, you have to be careful calling a fossil, like this rostral denticle of Ischyrhiza mira, a "sawfish", because there are the true pristid sawfish of the Tertiary (and still swimming around today), and the extinct sclerorhynchid sawfish of the Lt. Cret. (which this is). Both have long rostra hardened by prismatic calcified cartilage, with rostral denticles either sitting on the edge of the rostrum or embedded in the edge (Fam. Pristidae), or just straddling the edge (Fam. Sclerorhynchidae). When you look at the top two photos, of the base of this rostral denticle (I refuse to call them teeth, because they aren't in the mouth - the true teeth of sclerorhynchids look entirely different), you can see that the top was on one side of the edge of the rostrum, and the bottom on the other. Which brings me to the second point, this is a rostral denticle, not a frag. of the rostrum itself. Only recently, partial I. mira rostra with associated rost. dents. have finally been found in both Ala. and Tenn. Abyssunder - the FF Gallery is awesome. Link to comment Share on other sites More sharing options...
njfossilhunter Posted June 2, 2015 Share Posted June 2, 2015 The last picture of a fish jaw section and it's properly from a Enchodus. TonyThe Brooks Are Like A Box Of Chocolates,,,, You Never Know What You'll Find. I Told You I Don't Have Alzheimer's.....I Have Sometimers. Some Times I Remember And Some Times I Forget.... I Mostly Forget. Link to comment Share on other sites More sharing options...
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