traveltip1 Posted August 11, 2020 Share Posted August 11, 2020 I found these, endocast impressions of dorsal shields of the jawless fish Americaspis americana, in the Silurian of Pennsylvania. There are 2 1/3 dorsal shields shown. A complete shield measures approximately 2.4 x 1.0 inches (6.10 x 2.54 cm). 17 Link to comment Share on other sites More sharing options...
Misha Posted August 11, 2020 Share Posted August 11, 2020 Wow! This is a super cool find! Link to comment Share on other sites More sharing options...
Miocene_Mason Posted August 11, 2020 Share Posted August 11, 2020 Those are incredible! If you don’t mind me asking, what formation? “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
piranha Posted August 11, 2020 Share Posted August 11, 2020 38 minutes ago, WhodamanHD said: ...what formation? Occurrence — Late Silurian, Landisburg Sandstone Member of the Wills Creek Formation, Landisburg, Alinda, Andersonburg, and New Bloomfield in Perry County, Pennsylvania. The type material came from the same sandstone (then called the Bloomfield Sandstone) from unknown localities in Perry County. Denison, R.H. 1964. The Cyathaspididae: A Family of Silurian and Devonian Jawless Vertebrates. Chicago Natural History Museum, Fieldiana: Geology 13(5):309-473 PDF LINK 5 Link to comment Share on other sites More sharing options...
Fossildude19 Posted August 12, 2020 Share Posted August 12, 2020 Congratulations on a great set of finds! Thanks for posting them. We've missed your input, and are glad you are back. 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...
Petalodus12 Posted August 12, 2020 Share Posted August 12, 2020 These are awesome. Congrats! Link to comment Share on other sites More sharing options...
Jeffrey P Posted August 12, 2020 Share Posted August 12, 2020 Great specimen! Congratulations and thanks for sharing. I've heard that site is no longer accessible which is bad news for any of us who had hoped to one day collect a Silurian fish fossil. Link to comment Share on other sites More sharing options...
jdp Posted August 12, 2020 Share Posted August 12, 2020 wow, very nice fishes. Is there any bone left, or just the endocast of the headplate? Link to comment Share on other sites More sharing options...
traveltip1 Posted August 12, 2020 Author Share Posted August 12, 2020 2 hours ago, jdp said: wow, very nice fishes. Is there any bone left, or just the endocast of the headplate? No bone, only cast. Link to comment Share on other sites More sharing options...
Tomasz Posted August 16, 2020 Share Posted August 16, 2020 Absolutely fantastic! Congrats! I am focused on early vertebrates... Link to comment Share on other sites More sharing options...
crabfossilsteve Posted August 17, 2020 Share Posted August 17, 2020 Wow, congratulations. Being originally from York, I tried find that/those sites to look for them, but no find. Link to comment Share on other sites More sharing options...
JUAN EMMANUEL Posted August 18, 2020 Share Posted August 18, 2020 Nice fish fossils!! Link to comment Share on other sites More sharing options...
palaeoich Posted January 20, 2021 Share Posted January 20, 2021 I've seen a few posts now on Americaspis, and I am wondering if anyone who has collected these, or has them in their collections, has seen any small fin spines from the same deposit? Claypole described the acanthodian Onchus pennsylvanicus from the same stratum, but I haven't been able to find any records of it being found since. The spines would be less than 2 cm long. Link to comment Share on other sites More sharing options...
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