jkfoam Posted April 2, 2016 Share Posted April 2, 2016 Several years ago a fellow Fossil Forum member and I visited an Eocene site on the Trinity River in Houston County, Texas (Hurricane Lentil of the Cook Mountain Formation). I collected several plastic bags of matrix material to be sifted through for micro fossils. As is my custom I always save a portion of material to be sifted through at a later date. Well, at my age I've decided that now is that later date! Its fun to revisit old friends and see if you can find some new ones. This morning I did visit an old friend but in addition this specimen was the best example of this specie I have collected or seen. The fossil is Creseis simplex (Meyer, 1886), a gastropod, subclass Opistobranchia, Order Thecosomata, suborder Euthecosomata, and common name Pteropod. This fossil is not uncommon in this formation but because of its very thin shell it is often broken, the apex is almost always broken off or missing. Generally they are found most complete when recovered from the interior of a larger shell. This pteropod is often mistaken for a scaphopod but scaphopods are open on both ends where pteropods are closed on one end. Not all pteropods are straight, most are coiled but they are generally coiled sinstrally. For a reference please refer to the following publication; "Eocene Euthecosomatous Pteropoda (Gastropoda) of the Gulf and Eastern Coasts of North America", K.A. Hodgkinson, C.L. Garvie, and A.W.H. Be', Bulletins of American Paleontology, Vol 103, Number 341, June 26 1992 The specimen is approximately 4.0 mm in total length. This photo shows the slightly bulbous apex This photo shows the aperture. This photo shows a very small foram that fell out of the aperture of the specimen as I was transferring it to the microscope stage for photographing. Jim 1 The Eocene is my favorite Link to comment Share on other sites More sharing options...
fossisle Posted April 2, 2016 Share Posted April 2, 2016 very cool!! Cephalopods rule!! Link to comment Share on other sites More sharing options...
FossilDudeCO Posted April 2, 2016 Share Posted April 2, 2016 very nice find! Congrats! Link to comment Share on other sites More sharing options...
Darktooth Posted April 2, 2016 Share Posted April 2, 2016 Interesting find! I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
sixgill pete Posted April 2, 2016 Share Posted April 2, 2016 Very nice Jim. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
doushantuo Posted April 30, 2016 Share Posted April 30, 2016 (edited) I'll just chip in with the following,because it illustrates some Creseis : http://www.scriptageologica.nl/cgi/t/text/get-pdf?c=scripta;idno=10141a01 I enjoyed this one: https://www.researchgate.net/publication/291086907_A_review_of_the_ecology_palaeontology_and_distribution_of_atlantid_heteropods_Caenogastropoda_Pterotracheoidea_Atlantidae Edited April 30, 2016 by doushantuo Link to comment Share on other sites More sharing options...
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