Ptychodus sp.
(Da: en.wikipedia.org)
Phylum: Chordata Haeckel, 1874
Subphylum: Vertebrata Cuvier, 1812
Classe: Chondrichthyes Huxley, 1880
Ordine: Hybodontiformes Owen, 1846
Famiglia: Ptychodontidae Jaekel, 1898
Genere: Ptychodus Agassiz, 1837
Specie e sottospecie
Il genere annovera attualmente le seguenti specie: Ptychodus altior Agassiz 1839 - Ptychodus anonymus Williston 1900 - Ptychodus arcuatus Agassiz 1837 - Ptychodus articulatus Agassiz 1837 - Ptychodus belluccii Bonarelli 1899 - Ptychodus concentricus Agassiz 1839 - Ptychodus decurrens Agassiz 1839 - Ptychodus elevatus Leriche 1929 - Ptychodus gibberulus Agassiz 1837 - Ptychodus janewayii Cope 1874 – Ptychodus latissimus Agassiz 1843 - Ptychodus mahakalensis Chiplonkar and Ghare 1977 - Ptychodus mammillaris Agassiz 1839 - Ptychodus marginalis Agassiz 1839 - Ptychodus mortoni Agassiz 1843 - Ptychodus multistriatus Woodward 1889 - Ptychodus oweni Dixon 1850 - Ptychodus paucisulcatus Dixon 1850 - Ptychodus polygyrus Agassiz 1839 - Ptychodus rugosus Dixon 1850 - Ptychodus spectabilis Agassiz 1837 - Ptychodus whipplei Marcou 1858.
Diffusione
Vissuto circa 89 milioni di anni fa (stadio Turoniano). I fossili sono stati trovati nel Mare interno occidentale, Kansas, Stati Uniti d'America.
Bibliografia
–Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 144.
–Vullo, Romain; Villalobos-Segura, Eduardo; Amadori, Manuel; Kriwet, Jürgen; Frey, Eberhard; González González, Margarito A.; Padilla Gutiérrez, José M.; Ifrim, Christina; Stinnesbeck, Eva S.; Stinnesbeck, Wolfgang (2024-04-30). "Exceptionally preserved shark fossils from Mexico elucidate the long-standing enigma of the Cretaceous elasmobranch Ptychodus". Proceedings of the Royal Society B: Biological Sciences. 291 (2021).
–Everhart, Mike. "Ptychodus mortoni". Ocean of Kansas.
–"THE VERTEBRATE FAUNA OF THE SELMA FORMATION OF ALABAMA" (PDF). 3 (7). 1970. {{cite journal}}: Cite journal requires |journal= (help).
–Verma, Omkar; et al. (February 1, 2012). "Ptychodus decurrens Agassiz (Elasmobranchii: Ptychodontidae) from the Upper Cretaceous of India". Cretaceous Research. 33 (1): 183-188.
–Brignon, A., 2015, Senior synonyms of Ptychodus latissimus Agassiz, 1835 and Ptychodus mammillaris Agassiz, 1835 (Elasmobranchii) based on teeth from the Bohemian Cretaceous Basin (the Czech Republic). Acta Musei Nationalis Pragae, Series B - Historia Naturalis, 71 (1-2): 5-14.
–Brignon, A., 2019, Le diodon devenu requin : l'histoire des premières découvertes du genre Ptychodus (Chondrichthyes) [The porcupinefish that became a shark: History of the early discoveries of the genus Ptychodus (Chondrichthyes)]. Published by the author, Bourg-la-Reine, France, 100 pp..
–Everhard, Mike. "Ptychodontid Sharks: Late Cretaceous Shell Crushers". Ocean of Kansas.
–Everhart, Michael; Caggiano, Tom (2004). "An associated dentition and calcified vertebral centra of the Late Cretaceous elasmobranch, Ptychodus anonymus Williston 1900". Paludicola. 4 (4): 125-136.
–David, Michelle A historical and mechanical description of Ptychodus (Chondrichthyes) dententions with notes on the distribution and systematics of the genus.
–Hoffman, Brian L.; Hageman, Scott A.; Claycomb, Gregory D. (July 2016). "Scanning electron microscope examination of the dental enameloid of the Cretaceous durophagous shark Ptychodus supports neoselachian classification". Journal of Paleontology. 90 (4): 741-762.
–Shimada, K., Rigsby, C. K., & Kim, S. H. (2009). Partial skull of Late Cretaceous durophagous shark, Ptychodus occidentalis (Elasmobranchii: Ptychodontidae), from Nebraska, U.S.A.. Journal of Vertebrate Paleontology, 29 (2), 336-349.
–Shimada, K., Everhart, M. J., Decker, R., & Decker, P. D. (2010). A new skeletal remain of the durophagous shark, Ptychodus mortoni, from the Upper Cretaceous of North America: an indication of gigantic body size. Cretaceous Research, 31(2), 249-254.
–Jambura, Patrick L.; Kriwet, Jürgen (2020-04-22). "Articulated remains of the extinct shark Ptychodus (Elasmobranchii, Ptychodontidae) from the Upper Cretaceous of Spain provide insights into gigantism, growth rate and life history of ptychodontid sharks". PLOS ONE. 15 (4): e0231544.
–Shimada, Kenshu (October 31, 2012). "Dentition of Late Cretaceous shark, Ptychodus mortoni (Elasmobranchii, Ptychodontidae)". Journal of Vertebrate Paleontology. 32 (6): 1271-1284.
–Hamm, Shawn (May 2010). "The Late Cretaceous shark Ptychodus marginalis in the Western Interior Seaway, USA". Journal of Paleontology. 84 (3): 538-548.
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Data: 06/05/2015
Emissione: Animali preistorici del Carribe Stato: Cuba |
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