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Showing results for tags 'lopha'.
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From the album: Texas Cretaceous Fossils: Oysters
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- austin chalk formation
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From the album: Texas Cretaceous Fossils: Oysters
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- bivalve
- cretaceous
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Oyster Lopha bellaplicata Eagle Ford Formation
JamieLynn posted a gallery image in Member Collections
From the album: Texas Cretaceous Fossils: Oysters
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- cretaceous
- eagle ford formation
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From the album: Texas Cretaceous Fossils: Oysters
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- bivalve
- glen rose formation
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From the album: Texas Cretaceous Fossils: Oysters
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- bivalve
- glen rose formation
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From the album: Texas Cretaceous Fossils: Oysters
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- bellaplicata
- cretaceous
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From the album: Texas Cretaceous Fossils: Oysters
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- cretaceus
- georgetown formation
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From the album: Texas Cretaceous Fossils: Oysters
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- comalensis
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Would anyone know if there is a revised name for this fossil please. Originally labelled : Lopha asellus Lincolnshire limestone Metheringham Lincolnshire UK
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- lincolnshire limestone uk
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Good morning all. I have what I believe to be a Lopha bivalve from the upper Jurassic period from China. It measures 8.2 x 5.1 cm and has growth lines(?). Can anyone provide additional information or a correction if required?
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Picked this up just outside Toyah TX. the area is Cretaceous. I've searched every reference I can lay my hands on and am leaning toward a Lopha of some variety. Still have a lot of cleaning to do but it's incredibly slow going. Am I on the right track or is it some other kind of bivalve?
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- cretaceous
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Upper valve only. The genus of this has used several genera. Currently Peilinia is accepted (Kues, 1997) it has also been Ostrea and Lopha in several publications.
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Here are interior and exterior views of both valves of the Cretaceous oyster, Cameleolopha bellaplicata, collected in Post Oak Creek in Sherman, Texas, The specimen is more oval and elongated that most of the members of its species. The calcite valves with a trace of interior aragonite, mother of pearl, are covered in yellowish calcite cemented sandstone. The larger valve has the remnants of an attached ramose bryozoan that grew on the shell since the muddy Arcadia Park Formation did not provide a great hard ground to grow on. An unidentified domed colonial stone coral species also grow on the oysters in the area. The oysters are found in the upper part of the Arcadia Park Formation that contains a yellowish calcareous sandstone that is rich in small bivalves, shark teeth and other vertebrates. Similar mostly thin-bedded, yellowish and calcareous sandstones occur throughout north Texas and may be related to the thicker Bells Sandstone in eastern Grayson County. See this best reference: Hook, S. C. & Cobban, W. A. 2011. The Late Cretaceous oyster Cameleolopha bellaplicata (Shumard1860), guide fossil to middle Turonian strata in New Mexico. New Mexico Geology. 33: 67-95. Hook points out that Cameleolopha bellaplicata was "initially Ostrea, then Lopha, Alectryonia, and Nicaisolopha, and, now, Cameleolopha." Hook describes the oyster as follows: "Cameleolopha bellaplicata (Shumard 1860) is a medium-sized, plano-convex oyster with 8–27 generally simple plicae (ribs) that radiate from the beak. Secondary ornamentation consists of concentric lamellae that intersect the ribs. The general absence of attachment scars on preserved left valves indicates the species lived unattached as adults on the sea floor. Its left valve is larger and more convex than that of C. lugubris, giving it a more robust appearance and making it better suited to higher-energy, nearshore environments. The type specimens of C. bellaplicata came from the upper Eagle Ford Shale of Grayson County, Texas..." For additional information on the oyster see: Shumard, B. F., 1860. Descriptions of new Cretaceous fossils from Texas: Transactions of the Academy of Science of St. Louis, v. 1, pp. 590–610. Vyalov, O. S., 1936. Sur la classification des huîtres: URSS Academy of Sciences, Comptes rendus (Doklady), new series, v. 4 (13), no. 1 (105), pp. 17–20 (after August 1).
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- arcadia park formation
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