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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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- late campanian
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From the album: New Jersey Late Cretaceous
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New Cretaceous Pterosaur from Southeastern France
The Amateur Paleontologist posted a topic in Fossil News
Just got this report of a new pterosaur (Mistralazhdarcho maggii) from the Upper Cretaceous of southeastern France The specimen was collected from the highly fossiliferous "Velaux-La Bastide Neuve" site (Bouches-du-Rhône region), a site known for diverse tetrapod remains. The remains described consist of a mandibular symphysis, a few vertebrae, and several limb bones (including 2 humeri, a radius, a pteroid, a metacarpal and a wing phalanx). The authors of the paper (see attached below) consider that due to incomplete ossification of the bones, the specimen might represent an immature individual. M. maggii helps to provide more insight into the Late Cretaceous European azhdarchid radiation. Romain Vullo, Géraldine Garcia, Pascal Godefroit, Aude Cincotta & Xavier Valentin (2018): Mistralazhdarcho Maggii, Gen. Et Sp. Nov., A New Azhdarchid Pterosaur from the Upper Cretaceous of Southeastern France, Journal of Vertebrate Paleontology, DOI: 10.1080/02724634.2018.1502670 Abstract: A series of pterosaur bones from the Upper Cretaceous (Campanian) of Velaux (Bouches-du-Rhône, southeastern France) is described. This material, including both cranial and postcranial elements found in close association and likely belonging to a single immature individual, is assigned to a new genus and species of azhdarchid pterosaur, Mistralazhdarcho maggii. This large-sized taxon (wingspan ca. 4.5 m in the holotype, possibly reaching 5–6 m in mature individuals) is characterized by a slightly downturned mandibular symphysis that shows a ‘V’-shaped cross-sectional profile and bears a well-developed, anteriorly located median eminence on its dorsal surface. The presence of a median eminence suggests that Mistralazhdarcho might be closely related to Alanqa from the Cenomanian of Morocco. The material described here represents the first partial skeleton of a pterosaur recovered from the Late Cretaceous deposits of western Europe, and the new taxon is one of the most completely known European azhdarchids. Mistralazhdarcho is intermediate in size between the medium-sized genus Eurazhdarcho and the giant-sized genus Hatzegopteryx, two azhdarchids from the Maastrichtian of Romania. The discovery of Mistralazhdarcho suggests the presence of a third azhdarchid size class in the continental ecosystems of the latest Cretaceous European archipelago. photography of the mandibular symphysis of M. maggii (measures 264mm). Here's the paper Vullo et al. 2018 Mistralazhdarcho.pdf Hope you liked this! -Christian-
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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
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