Chondrichthyan Origin for the Fossil Record of the Tselfatiiform Osteichthyan Fish, Thryptodus zitteli Loomis, from the Upper Cretaceous Mooreville Chalk of Alabama

April 2013
Bulletin of the Alabama Museum of Natural History;Apr2013, Vol. 31 Issue 1, p72
Academic Journal
The geologically youngest record of Thryptodus Loomis, a Late Cretaceous bony fish genus (Tselfatiiformes), is from the Campanian portion of the Mooreville Chalk of Alabama. A re-examination of the sole material representing this youngest record reveals that the specimen consists of calcified cartilage prisms, indicating that it belongs to a chondrichthyan fish rather than to an osteichthyan. The re-identification made here thus concomitantly eliminates the only Campanian record for Thryptodus and emends its chronostratigraphic range to late middle Cenomanian through late Coniacian. The specimen closely resembles a skeletal part of a putative anacoracid shark (genus and species indeterminate) from the Mooreville Chalk of Alabama, suggesting that it may belong to Anacoracidae.


Related Articles

  • New thelodont (Agnatha) and possible chondrichthyan (Gnathostomata) taxa established in the Silurian and Lower Devonian of the Canadian Arctic Archipelago. M�rss, Tiiu; Wilson, Mark V.H.; Thorsteinsson, Raymond // Proceedings of the Estonian Academy of Sciences, Geology;Jun2002, Vol. 51 Issue 2, p88 

    New vertebrate taxa of Silurian and Early Devonian age from the Canadian Arctic Archipelago are established. Diagnoses, type designations, and illustrations are given for 25 new species of thelodonts and 2 new species tentatively referred to chondrichthyans. In addition, 10 new genera, 6 new...

  • Palaeontology: A jaw-dropping fossil fish. Friedman, Matt; Brazeau, Martin D. // Nature;10/10/2013, Vol. 502 Issue 7470, p175 

    The article focuses on the fossil of a fish and its evolutionary analysis. It mentions that there are two groups of gnathostomes including cartilaginous and bony fishes which have contrasting conditions of external skeleton. It states that both these types of fishes arised from common ancestor...

  • La collection de préparations histologiques effectuées par Paul Gervais (1816-1879) sur le squelette des "poissons". MEUNIER, François J.; HERBIN, Marc // Cybium: International Journal of Ichthyology;2014, Vol. 38 Issue 1, p23 

    Paul Gervais (1816-1879) was professorship of the Laboratory of Comparative Anatomy (National Museum of Natural History, Paris) from 1868 to 1879. During the latest part of his career, he developed an obvious interest for histological researches on the vertebrate skeleton, especially on fossil...

  • Something fishy in the family tree. Ahlberg, Per Erik // Nature;2/18/1999, Vol. 397 Issue 6720, p564 

    Discusses a paleontology study of a basal bony fish fossils with an unexpected mix of characteristics which forces a reconsideration of the evolution of large parts of the vertebrate family tree. Implications for the origin of bony fishes, or Osteichthyes; Two branches in which the bony fishes...

  • Phylogenetic relationships of †Luisiella feruglioi (Bordas) and the recognition of a new clade of freshwater teleosts from the Jurassic of Gondwana. Sferco, Emilia; López-Arbarello, Adriana; Báez, Ana María // BMC Evolutionary Biology;12/3/2015, Vol. 15, p1 

    Background: Teleosts constitute more than 99 % of living actinopterygian fishes and fossil teleosts have been studied for about two centuries. However, a general consensus on the definition of Teleostei and the relationships among the major teleostean clades has not been achieved. Our current...

  • Beachcombing for fossils. Craven, John; Hogan, Tracy // Science Scope;Oct2006, Vol. 30 Issue 2, p66 

    The article offers information about fossil shark teeth in the U.S. According to the author, sharks are among those which belong to class of fish called Chondrichthyes. These species are distinguished to have cartilaginous skeletons, however, they have teeth which vary in size and shape. Their...

  • An Inquiry into the Stratigraphic Occurrence of a Claibornian (Eocene) Vertebrate Fauna from Covington County, Alabama. CLAYTON, ANGELA A.; CIAMPAGLIO, CHUCK N. CIAMPAGLIO; CICIMURRI, DAVID J. // Bulletin of the Alabama Museum of Natural History;Apr2013, Vol. 31 Issue 2, p60 

    A fossil-rich deposit occurring within Eocene strata is exposed along a roughly 600 meter-long section of the Conecuh River (at low water level) near the Point "A" Dam, north of River Falls in Covington County, Alabama. The deposit consists of bluish-green unconsolidated, poorly sorted,...

  • On the Hybodus (Euselachii) from the Early Jurassic of Anina (CaraÅŸ Severin district, Romania). Dica, Emanuel Paul; Codrea, Viad // Studia Universitatis Babes-Bolyai, Geologia;2006, Vol. 51 Issue 1/2, p51 

    A new Hybodus site from Romania is located at Anina. in the Pliensbachian - Middle Toarcian succession from Ponor quarry (CaraÅŸ-Severin district). The paper refers to a short description of the Hyhodus teeth recently collected, followed by some considerations on hybodoiits phylogcny and...

  • An autopodial-like pattern of Hox expression in the fins of a basal actinopterygian fish. Davis, Marcus C.; Dahn, Randall D.; Shubin, Neil H. // Nature;5/24/2007, Vol. 447 Issue 7143, p473 

    Comparative analyses of Hox gene expression and regulation in teleost fish and tetrapods support the long-entrenched notion that the distal region of tetrapod limbs, containing the wrist, ankle and digits, is an evolutionary novelty. Data from fossils support the notion that the unique features...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics