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Showing results for tags 'Albian'.
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From the album: Prae's Collection (REMPC)
REMPC-C0039 Aioloceras besairiei (polished) Cretaceous, Albian Boeny Region, Southwest of Mahajunga, Madagascar-
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From the album: Prae's Collection (REMPC)
REMPC-C0036 Aioloceras besairiei Cretaceous, Albian Boeny Region, Southwest of Mahajunga, Madagascar-
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Ceratostreon texanum (uppper and lower valve) Pic 4
Creek - Don posted a gallery image in Member Collections
Walnut Formation (albrian) 8-22-2021 Near Fort Hood, Texas (Central Texas) -
Ceratostreon texanum (uppper and lower valve) Pic 1
Creek - Don posted a gallery image in Member Collections
Walnut Formation (albian) 8-22-2021 Near Fort Hood, Texas (Central Texas) -
Dear forumers. Need your help with ID of this ammonite. D about 4cm. Cretaceous, albian.
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Hi everyone! Found these two specimens in the Upper Albian Burim formation in Ukraine. Would appreciate any help with ID! 1. So this 1.2 cm tooth is as basic as they get - no carinae, no enamel ornamentation (enamel is there by the way), circular cross section and this really weird apical twist. When I found it in the sieve I thought it was a Polycotylid plesiosaur, but lack of striations is not typical of plesiosaurs. Can't find a large fish without carinae either (Icthyodectids, Enchodontids, Protosphyraena, Pachyrhizodus and other pachycormids all have carinae), although enamel is quite thick and definitely looks more reptilian. Crocs also have carinae. Apparently, Ctenochasmatid pterosaurs can have all of these features, but this tooth is quite robust for a pterosaur. I am confused... For comparison, other stuff from this locality left to right: Icthyodectid, Protosphyraena, Enchodus, Platypterygiine ichthyosaur, Polycotylid, Elasmosaurid tooth tip and Ornitocheiroid pterosaur 2. Well, for this one I am pretty sure it is a teleost of some kind. At first I thought it is a very worn tooth in a jaw section, but the overall shape is inconsistent with fish jaw bones. It seems relatively complete, so it would be great if there is anything diagnostic. (6 cm) @pachy-pleuro-whatnot-odon @Mike from North Queensland @ anyone else
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Fossil hunting at or near Fort Hood military base in Central Texas
Creek - Don posted a topic in Fossil Hunting Trips
Spent some time yesterday driving around Fort Hood military base area. I didn't go inside the main base, but there were plenty of public roads and lands next to the base that were not fenced in or restricted. I managed to find few spots that were exposed to the erosion. Most fossils were bivalves, gastropod and lots of broken oxytropidoceras ammos. Due to nature of the preservation most Oxy's were broken. West Fort Hood in the background. Road leading to Fort Hood gate. Exposed Walnut Formation surface. Gryphaeas were everywhere! Collection. This is the biggest Oxy ammo I've ever found in Texas. It measures almost 13 inches.
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Class: Bivalvia - Bivalves - Pelecypods Order: Ostreoida Sub-family: Lophinae -
Class: Bivalvia - Bivalves - Pelecypods Order: Ostreoida Sub-family: Lophinae -
Class: Bivalvia - Bivalves - Pelecypods Order: Ostreoida Sub-family: Lophinae -
Quote from Ebert 2014, p. 16-17: “The genus Belonostomus Agassiz, 1834b is one of four genera of the extinct family Aspidorhynchidae Nicholson & Lydekker 1889. The other three are the type genus Aspidorhynchus Agassiz, 1833 from mid to late Jurassic marine deposits of the Tethys (Cuba, France, Germany, Great Britain), Vinctifer Jordan, 1919 from Cretaceous marine deposits of the Gondwana coasts (Antarctica, Argentina, Australia, Brazil, Columbia, Equatorial Guinea, Mexico and Venezuela) and Richmondichthys Bartholomai, 2004 from marine deposits of the Cretaceous (Albian) of Queensland (Australia). The genus Belonostomus is widespread, ranging from the late Jurassic (Kimmeridgian to Tithonian of England, France and Germany) to the Cretaceous (England, Germany, Italy, Lebanon, North and South America) and maybe even up to the Paleocene…” Diagnosis of the genus (amended from Brito 1997 in Ebert 2014, p. 22): "A very slender and elongated Aspidorhynchidae, with a maximum depth (MD) of about 6-9% of standard length (SL). The cranium is also slender and elongate with both jaws of great length. The main characteristic feature is an elongated predentary, which is nearly as long as the dentary. A supramaxilla does not exist. The maxilla is pointed at the ends with a laterally expanded lamella at the dorsal border. Ganoin on the scales is present. There are three dorsoventrally elongated flank scales in the middle of the body, of which the median one is the lateral line scale, which is two to three times higher than long. All fins are reduced in size and have fewer rays than in other members of Aspidorhynchidae." Brito (1997, p. 743-744) mentions a new species of the genus Belonostomus (Belonostomus sp. " 3 ") from the quarry Tlayúa without giving an official name. Identified as Belonostomus sp. by oilshale using Brito, 1997. References: Agassiz L. (1834) Abgerissene Bemerkungen über fossile Fische.- Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefaktenkunde, pp. 379-390. Brito P. M. (1997) Révision des Aspidorhynchidae (Pisces, Actinopterygii) du Mésozoïque : ostéologie, relations phylogénétiques, données environnementales et biogéographiques. Geodiversitas 19 (4): 681-772. g1997n4a2.pdf (mnhn.fr) Espinosa-Arrubarrena, L. and Alvarado-Ortega, J. (2010) Field trip to the Tlayúa quarry. Gonzalez-Rodriguez, K. and Arratia, G. (eds.), Fifth International Meeting of Mesozoic Fishes-Global Diversity and Evolution. Abstract Book & Field Guides. Pachua, Cinecia al Dia, 19:93-113. Ebert, Martin (2014) The genus Belonostomus Agassiz, 1834 (Neopterygii, Aspidorhynchiformes) in the late Jurassic of the Solnhofen Archipelago, with a focus on Belonostomus kochii Münster, 1836 from Ettling (Germany). Archaeopteryx 32: 15-43; Eichstätt.
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From the album: Texas Echinoids, ERose
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Hello I found this piece of sandstone along the Athabasca river just south of Fort McMurray, Alberta, Canada. Since it’s sandstone I’m assuming it came from either the Mcmurray (late barremian or early Aptian) or Grandrapids (Albian) formation although my geology skills are not great. I tried to do some googling on what it could be but I found no results since I couldn’t be specific enough since I don’t really know what I’m doing. Any ideas? I attached an image of the location for fun that I took a while before I found the rock. I found it to the right of the creek thanks
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Hi guys, weird question here, I have done some digging but I can’t for the life of me find any decent references to this shark. I guess this is what happens when you fall into the trap of taxonomic collecting lol I’ve been looking at otodus recently and seeing as paleogenotodus is synonymous, it caught my attention. Last question, I wonder if anyone on this forum has actually seen a fossil of this shark? Anyway thanks for your help Also while we’re on the subject of otodus, does anyone have any info or examples of O.limhammensis or O. Poseidoni, thanks again
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Found today during the ammonite hunt. Cretaceous - Albian
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From the album: Cephalopods Worldwide
6cm. Ambarimangian Formation Albian Early Cretaceous From Mahajunga Province, Madagascar-
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- albian
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From the album: Lower Cretaceous Vertebrate Fossils of Central Texas
This large (2" long) jaw is again built into the wall at Westcave Preserve. From the Glen Rose Formation. Quarried near Sisterdale, Kendall County.© ERose 2021
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From the album: Lower Cretaceous Vertebrate Fossils of Central Texas
This is one of two jaws that are in the walls at Westcave Preserve. Quarried from the Glen Rose near Sisterdale, Kendall County.© ERose 2021
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From the album: Lower Cretaceous Vertebrate Fossils of Central Texas
Another large fish preserved in a hard limestone that was used to build the visitor center at Westcave Preserve. This one is the largest at at least a foot in length.© ERose 2021
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From the album: Lower Cretaceous Vertebrate Fossils of Central Texas
Pycnodontid Jaw Plate Lower echinoid marker bed, Unit 2, Lower Member, Glen Rose Formation, Trinity Group Albian (Lower Cretaceous) This is a favorite! I found the two pieces in the same spot TWO YEARS apart. PS they glued back together perfectly.© ERose 2021
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From the album: Lower Cretaceous Vertebrate Fossils of Central Texas
Unknown tooth, 2 tiny Pycnodontid teeth Upper Member, Glen Rose Formation, Trinity Group Albian (Lower Cretaceous) Blanco County, Texas The pycnodontid teeth are fairly common at this local. The longer tooth is quite different and I still do not have a solid ID© ERose 2021
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From the album: Lower Cretaceous Vertebrate Fossils of Central Texas
Unidentified Reptile Bone Upper Member, Glen Rose Formation, Trinity Group Albian (Lower Cretaceous) Blanco County, Texas possibly the femur of a marine turtle© ERose 2021
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From the album: Lower Cretaceous Vertebrate Fossils of Central Texas
© ERose 2021
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From the album: Lower Cretaceous Vertebrate Fossils of Central Texas
© ERose 2021
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From the album: Lower Cretaceous Vertebrate Fossils of Central Texas
Unidentified marine turtle plastron fragment Upper Member, Glen Rose Formation, Trinity Group Albian (Lower Cretaceous) Blanco County, Texas Turtle plastron fragments are somewhat common. This is one of the larger pieces I have found at this location.© ERose 2021
