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Showing results for tags 'late campanian'.
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Some Cretaceous fossils (early early Maastrichtian)
Fossilsforever posted a topic in Fossil Hunting Trips
Hello all! Found some nice Cretaceous fossils from early early Maastichtian age (and/or late late Campanian). These are around 70-67 million or 70-68 million years old (the exact age is difficult to determine but around the mentioned 70-67 mya, possibly including the late late Maastrichtian). Mainly belemnites from the Belemnitella and Belemnella (Pachybelemnella) species and sea urchins (two 5-7 cm Echinocorys sp. Possibly E. scutata (Leske, 1778). Some belemnites are black and/or brown coloured. All the fossils are found in sediments of Cretaceous age (Formatie van Gulpen, Kalksteen van Vijlen, The Netherlands). Also found two bones and one horse tooth (Holocene age and/or Pleistocene).-
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Almucidaris is a very unusual cidarian genus due to its enlarged plates that form marsupia for breeding. North American paleontologists Blake and Zinsmeister erected the genus in 1991 and described Almucidaris durhami as the type species here. Until now, only two species have been found showing marsupia. In 1933, Lambert first described the species (without marsupia) as Typocidaris falgarsensis here (in French). As the holotype designated by Lambert was lost in the Spanish Civil War in 1997, J. F. Carrasco designated a neotype (also without marsupia) and renamed the species as Temnocidaris (Stereocidaris) falgarsensis here (in Spanish). Finally, A. B. Smith and C. H. Jeffery included the species falgarsensis in the genus Almucidaris in this 2000 paper: Maastrichtian and palaeocene echinoids: a key to world faunas. Special papers in palaentology; 63. p. 30-31. (This paper is not free access, so I can't link it)
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Finished preparing this big old crab a couple of weeks ago. Easily the most difficult prep that I've attempted because of spotty preservation and pyritization. Estimating that I spent about 240+ hours on prep and it is still ugly. Have not been able to ID yet, but hopefully there is enough detail to come up with an ID eventually. What do you think, Alex? Was enclosed in a nodule that was broken. Collected the larger piece in February 2019 and the right cheliped in September 2018. The carapace is about 8.5" long and 8.0" wide. The chelipeds, measured along the outside edge are about 22" long and are about equal in size. Attached are a few photos. Collected from the lower Ripley Fm., Upper Cretaceous (Late Campanian) in south-central Alabama, USA.
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From the album: New Jersey Late Cretaceous
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- late campanian
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I was sorting some North Carolina Cretaceous matrix this week when I saw a shape that reminded me of a Theropod tooth. I really didn't think it was because of the tiny size but when I stuck it under the microscope I saw a few serrations on the distal side. Now I'm convinced it is a Theropod tooth. I've looked up some Cretaceous lizards (Teiids and Varanids) but their teeth are different but varanids can be somewhat similar. The matrix is from a late Campanian lag deposit and most of the fossils in it are heavily abraded. This is the first theropod tooth I've found. No sign of serrations on the mesial side but they could have been worn off if they ever existed. I tried a crude count of serrations by extrapolating the number of serrations per millimeter. The count is somewhere around 8 serrations per millimeter.
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- cretaceous
- dinosaur
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