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Showing results for tags 'myliobatidae'.
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From the album: Fossil Collection: DC Area and Beyond
Myliobatidae Aurora Fossil Museum, NC Pungo River and Yorktown Formations Miocene-
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- ray
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From the album: Fossil Collection: DC Area and Beyond
Myliobatidae Aurora Fossil Museum, NC Pungo River and Yorktown Formations Miocene-
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From the album: Fossil Collection: DC Area and Beyond
Myliobatidae Nanjemoy WMA (Purse), MD Aquia Formation Paleocene-
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The literature reviewed shares a common belief that the genus Myliobatis has been, and continues to be, used as a “catch-all” genus within the Myliobatidea family. While the ray fossil record is extensive, incomplete specimens and a lack of sufficient extant material to compare it to has resulted in our inability to recognize generic differences in myliobatid dentitions. While some authors were confident identifying specimens to the genus level (and even reassigning specimens previously identified as Myliobatis to another genus), most included the caveat that we lack the knowledge and material necessary to definitively identify these specimens. A communication with David Cicimurri has provided valuable insight into this find : "As far as the taxon goes, I would identify it as “Aetomylaeus” sp., which is a type of eagle ray. I use quotes because, although the teeth look very much like those of modern Aetomylaeus, studies suggest that the genus had not evolved by the Oligocene, so we can’t call Oligocene species by that name. The species is either something in the lineage that leads to Aetomylaeus or is another taxon that convergently evolved a similar tooth shape and dental arrangement – wide symphyseal teeth flanked by several rows of elongated and diamond-shaped lateral teeth." References: Claeson, K. M., O'Leary, M. A., Roberts, E. M., Sissoko, F., Bouaré, M., Tapanila, L., ... & Gottfried, M. D. (2010). First Mesozoic record of the stingray Myliobatis wurnoensis from Mali and a phylogenetic analysis of Myliobatidae incorporating dental characters. Acta Palaeontologica Polonica, 55(4), 655-674. Cicimurri, D. J., Knight, J. L., & Ebersole, J. A. (2022). Early Oligocene (Rupelian) fishes (Chondrichthyes, Osteichthyes) from the Ashley Formation (Cooper Group) of South Carolina, USA. PaleoBios, 39(1). Cicimurri, D. J., & Knight, J. L. (2019). Late Eocene (Priabonian) elasmobranchs from the Dry Branch Formation (Barnwell Group) of Aiken County, South Carolina, USA. PaleoBios, 36. Cicimurri, D. J., & Knight, J. L. (2009). Late Oligocene sharks and rays from the Chandler Bridge Formation, Dorchester County, South Carolina, USA. Acta Palaeontologica Polonica, 54(4), 627-647. Ray, C. E., & Bohaska, D. J. (2001). Geology and Paleontology of the Lee Creek Mine, North Carolina, III. Villafaña, J. A., Marramà, G., Hernandez, S., Carrillo-Briceño, J. D., Hovestadt, D., Kindlimann, R., & Kriwet, J. (2019). The Neogene fossil record of Aetomylaeus (Elasmobranchii, Myliobatidae) from the southeastern Pacific. Journal of Vertebrate Paleontology, 39(1), e1577251. Welton, B. J. (1980). Eocene neoselachians from the La Meseta Formation, Seymour Island, Antarctic Peninsula. Also visit these websites: https://www.app.pan.pl/article/item/app20080077.html (Chandler Bridge Fm.) https://escholarship.org/uc/item/0xv324c8 (Ashley Formation)
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- summervillle
- south carolina
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From the album: Gainesville Florida Microscopic Miocene
Another tooth of a ray from the family Myliobatidae.-
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- pteromylaeus
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From the album: Gainesville Florida Microscopic Miocene
These ray teeth are often assigned to the genus Myliobatis but other authors dispute this designation. They are certainly some ember of the family Myliobatidae.-
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- myliobatis
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I live in the Arabian desert, near Jebel Hafeet. Yesterday I found a pavement tooth of an eagle ray. Today I found a mysterious fossil which looks like it might be part of the body and fins/wings of a ray. I appreciate that their bodies were made of cartilage and that is not usually preserved very well, but in some cases it’s possible. Any opinions would be most appreciated. Thank you so much.
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