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A new hybodont shark (Chondrichthyes, Elasmobranchii) from the Upper Triassic Tiki Formation of India with remarks on its dental histology and biostratigraphy

  • Mohd Shafi Bhat (a1), Sanghamitra Ray (a1) and P. M. Datta (a2)

A new lonchidiid genus, Pristrisodus, from the Upper Triassic Tiki Formation of India is described based on multiple, well-preserved, isolated teeth. Comparative analysis resulted in synonymizing Parvodus tikiensis and Lissodus duffini, which are known from the same horizon and resulted in a new taxon, Pristrisodus tikiensis n. comb. These teeth are elongated with mesiodistal length greater than or equal to twice the labiolingual width and have a high principal cusp, lateral cusplets, a distinct ridge near the crown-root junction labially and higher up on the crown lingually, weak ornamentation, and linear depression along the crown-root junction. Five morphotypes based on overall shape, robustness and crown height are determined. The teeth show a gradual monognathic heterodonty. The anterolateral teeth (morphotypes I−II) have high, pyramidal principal cusp with two or three small but pointed cusplets, and triangular labial and lingual protuberance. The posterolateral teeth (morphotypes III−IV) have four incipient cusplets, relatively low principal cusp, bilobed/rounded, hanging labial and incipient lingual protuberances. Morphotype V comprises anterior teeth that are broad, triangular and robust, and have rounded/blunt principal cusp, one cusplet, and low, hanging labial peg. Multivariate analyses corroborate the qualitative assessment of the Indian hybodonts. Dental histology of Pristrisodus n. gen., shows that it is distinctly different from other lonchidiid genera. The assemblage of freshwater sharks, along with other vertebrate microfossils of the Tiki Formation, shows similarity with that of the lower Tecovas Formation of the Chinle Group, USA. The euryhaline nature resulted in the adaptation of the hybodonts to freshwater systems in India during the Carnian.

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Ansorge J., 1990, Fischreste (Selachii, Actinopterygii) aus der Wealdentonscholle von Lobber Ort (Mönchgut/Rügen/DDR): Paläontologische Zeitschrift, v. 64, p. 133144.
Bandyopadhyay S., 1999, Gondwana vertebrate faunas of India: Proceedings of the Indian National Science Academy, v. 65, p. 285313.
Bandyopadhyay S., 2011, Non-marine Triassic vertebrates of India, in Calvo, J.O., Porfiri, J., Gonzalez, B., and Santos, D.D., eds., Paleontología y Dinosaurios desde América Latina: EDIUNC, Editorial de la Universidad Nacional de Cuyo, Mendoza, Argentina, p. 3346.
Becker M.A., Chamberlain J.A., and Terry D.O., 2004, Chondrichthyans from the Fairpoint Member of the Fox Hills Formation (Maastrichtian), Meade County, South Dakota: Journal of Vertebrate Paleontology, v. 24, p. 780793.
Bhat M.S., 2015, A new and diverse late Triassic fish assemblage from India: International conference on current perspectives and emerging issues in Gondwana evolution, Lucknow, India, Abstract Volume, p. 22.
Bhat M.S., 2017, Techniques for systematic collection and processing of vertebrate microfossils from their host mudrocks: a case study from the Upper Triassic Tiki Formation of India: Journal of the Geological Society of India, v. 89, p. 369374.
Bhat M.S., Ray S., and Datta P.M., 2015, Small archosauriform teeth from the Late Triassic of India: implications on early radiation of the dinosaurs: XXV Indian Colloquium on Micropaleontology and Stratigraphy, Aurangabad, India, Abstract Volume, p. 7071.
Bhat M.S., Ray S., and Datta P.M., 2017, Multivariate analyses reveal a new assemblage of diverse and small archosauriforms (Reptilia, Diapsida) from the Upper Triassic of India: Geophysical Research Abstracts Volume 19, EGU2017-18516, European Geosciences Union General Assembly 2017.
Błażejowski B., 2004, Shark teeth from the Lower Triassic of Spitsbergen and their histology: Polish Polar Research, v. 25, p. 153167.
Bonaparte C.L.J., 1838, Selachorum tabula analytica: NuoviAnnali delle Scienze Naturali Bologna, v. 1, p. 195214.
Broom R., 1909, The fossil fishes of the Upper Karroo Beds of South Africa: Annals of South African Museum, v. 7, p. 251269.
Burmeister K.C., Flynn J.J., Parrish J.M., and Wyss A.R., 2006, Paleogeographic and biostratigraphic implications of new Early Mesozoic terrestrial vertebrate fossils from Poamay, central Morondava Basin, Madagascar, in Harris, J.D., Lucas, S.G., Spielmann, J.A., Lockley, M.G., Milner, A.R.C., and Kirkland, J.I., eds., The Triassic-Jurassic terrestrial transition: Bulletin of the New Mexico Museum of Natural History, v. 37, p. 457475.
Cappetta H., 1987, Chondrichthyes II: Mesozoic and Cenozoic Elasmobranchii, in Schultze, H.-P., ed., Handbook of Paleoichthyology 3B: Stuttgart, Gustav Fischer Verlag, 193 p.
Cappetta H., 2012, Chondrichthyes: Mesozoic and Cenozoic Elasmobranchii: Teeth, in Schultze, H.-P., ed., Handbook of Paleoichthyology 3E: Munich, Verlag Dr. Friedrich Pfeil, 512 p.
Carlson S.J., 1989, Vertebrate dental structures, in Carter, J.G., ed., Skeletal Biomineralization: Patterns, Processes and Evolutionary Trends, Vol. 1: New York, Van Nostrand Reinhold, p. 531556.
Chinsamy A., and Raath M.A., 1992, Preparation of fossil bone for histological study: Palaeontologia Africana, v. 29, p. 3944.
Cifelli R.L., Madsen S.K., and Larson M.E., 1996, Techniques for recovery and preparation of microvertebrate fossils: Oklahama Geological Survey Special Publication, v. 96, p. 124.
Cuny G., 2012, Freshwater hybodont shark in Early Cretaceous ecosystems: a review, in Godefroit, P., ed., Bernissart Dinosaurs and Early Cretaceous Terrestrial Ecosystems: Bloomington, Indiana University Press, p. 519529.
Cuny G., Suteethorn V., Kamha S., Buffetaut E., and Philippe M., 2006, A new hybodont shark assemblage from the Lower Cretaceous of Thailand: Historical Biology, v. 18, p. 2131.
Cuny G., Suteethorn V., Buffetaut E., and Ouaja M., 2007, Hybodont sharks from the Aptian–Albian of Tunisia and Thailand: Bulletin de la Société d’Etude des Sciences Naturelles d’Elbeuf, v. 1, p. 7185.
Datta D., Mukherjee D., and Ray S., 2016, A new phytosaur (Diapsida; Archosauria) bonebed from the Late Triassic Tiki Formation of India: taphonomic signatures: 76th Annual Meeting of the Society of Vertebrate Paleontology, Salt Lake City, Utah, Program and Abstracts, 2016, p. 123.
Datta P.M., 1981, The first Jurassic mammal from India: Zoological Journal of the Linnean Society of London, v. 73, p. 307312.
Datta P.M., 2004, A suggestion for an early Tuvalian time segment for the Tiki Formation, South Rewa Gondwana Basin, India and other correlatable continental sequences: Albertina, v. 30, p. 67.
Datta P.M., 2005, Earliest mammal with transversely expanded upper molar from the Late Triassic (Carnian) Tiki Formation, South Rewa Gondwana Basin, India: Journal of Vertebrate Paleontology, v. 25, p. 200207.
Datta P.M., Yadagiri P., and Rao B.R.J., 1978, Discovery of Early Jurassic micromammals from Upper Gondwana sequence of Pranhita-Godavari Valley, India: Journal of the Geological Society of India, v. 19, p. 6468.
Datta P.M., Das D.P., and Luo Z.X., 2004, A Late Triassic dromatheriid (Synapsida: Cynodontia) from India: Annals of the Carnegie Museum, v. 73, p. 7284.
Donath K., 1995, Preparation of Histologic Sections: Hamburg, EXAKT–Kulzer Publication, 16 p.
Duffin C.J., 1985, Revision of the hybodont selachian genus Lissodus Brough (1935): Palaeontographica A, v. 188, p. 105152.
Duffin C.J., 1993, Mesozoic chondrichthyan faunas 1. Middle Norian (Upper Triassic) of Luxembourg: Palaeontographica A, v. 229, p. 1536.
Duffin C., and Theis D., 1997, Hybodont shark teeth from the Kimmeridgian (Late Jurassic) of northwest Germany: Geologica Palaeontologica, v. 31, p. 235256.
Duncan M., 2004, Chondrichthyan genus Lissodus from the Lower Carboniferous of Ireland: Acta Palaeontologica Polonica, v. 49, p. 417428.
Fischer J., 2008, Brief synopsis of the hybodont form taxon Lissodus Brough, 1935, with remarks on the environment and associated fauna: Freiberger Forschungshefte, v. 528C, p. 123.
Fischer J., Schneider J.W., and Ronchi A., 2010, New hybondontoid shark from the Permo-Carboniferous (Gzhelian–Asselian) of Guardia Pisano (Sardinia, Italy): Acta Palaeontologica Polonica, v. 55, p. 241264.
Fischer J., Voigt S., Schneider J.W., Buchwitz M., and Voigt S., 2011, A selachian freshwater fauna from the Triassic of Kyrgyzstan and its implication for Mesozoic shark nurseries: Journal of Vertebrate Paleontology, v. 31, p. 937953.
Francillon-Vieillot H., Buffrénil V., de, Castanet J., Géraudie J., Meunier F.J., Sire J.Y., Zylberberg L.L., and Ricqlès A., de, 1990, Microstructure and mineralization of vertebrate skeletal tissues, in Carter, J.G., ed., Skeletal Biomineralization: Patterns, Process and Evolutionary Trends: New York, Van Nostrand Reinhold, v. 1, p. 471530.
Ginter M., Hairapetian V., and Klug C., 2002, Famennian chondrichthyans from the shelves of North Gondwana: Acta Geologica Polonica, v. 52, p. 169215.
Ginter M., Hampe O., and Duffin C., 2010, Chondrichthyes: Paleozoic Elasmobranchii: Teeth, in Schultze, H.-P., ed., Handbook of Paleoichthyology 3D: München, Verlag Dr. Friedrich Pfeil, 168 p.
Gupta A., 2009, Ichthyofauna of the Lower Triassic Panchet Formation, Damodar Valley basin, West Bengal, and its implications: Indian Journal of Geosciences, v. 63, p. 275286.
Hammer Ø., and Harper D., 2006, Palaeontological Data Analysis: Oxford, Blackwell Publishing, 351 p.
Hammer Ø., Harper D.A.T., and Ryan P.D., 2001, PAST: palaeontological statistics software package for education and data analysis: Palaeontologia Electronica, v. 4, p. 19.
Heckert A.B., 2004, Late Triassic microvertebrates from the Upper Triassic Chinle Group (Otischalkian–Adamanian: Carnian), southwestern U.S.A: Bulletin of the New Mexico Museum of Natural History and Science, v. 27, p. 1170.
Heckert A.B., and Lucas S.G., 2006, Micro- and small vertebrate biostratigraphy and biochronology of the Upper Triassic Chinle Group, southwestern USA, in Harris, J.D., Lucas, S.G., Spielmann, J.A., Lockley, M.G., Milner, A.R.C., and Kirkland, J.I., eds., The Triassic–Jurassic terrestrial transition: New Mexico Museum of Natural History and Science, v. 37, p. 94104.
Heckert A.B., Ivanov A., and Lucas S.G., 2007, Dental morphology of the hybodontoid shark Lonchidion humblei Murry from the Upper Triassic Chinle Group, USA: New Mexico Museum of Natural History and Science Bulletin, v. 41, p. 4548.
Hendrickx C., Mateus O., and Araújo R., 2015, The dentition of megalosaurid theropods: Acta Palaeontologica Polonica, v. 60, p. 627642.
Herman J., 1977, Les Sélaciens des terrains néocrétacés et paléocènes de Belgique et des contrées limitrophes. Eléments d’une biostratigraphie intercontinentale: Mémoirs pour Servir à Explication des Cartes Géologiques et Minières de la Belgique, v. 15, p. 1450.
Hibbard C.W., 1949, Techniques of collecting microvertebrate fossils: Contributions from the Museum of Paleontology, University of Michigan, v. 8, p. 719.
Hodnett J.-P., Elliot D.K., Olson T.J., and Wittke J.H., 2013, Ctenacanthiform sharks from the Permian Kaibab Formation, Northern Arizona: Historical Biology, v. 24, p. 381395.
Huxley T.H., 1880, On the Application of the laws of evolution to the arrangement of the Vertebrata, and more particularly of the Mammalia: Proceedings of the Scientific Meetings of the Zoological Society of London, v. 43, p. 649662.
Jain S.L., 1980, Freshwater xenacanthid (=pleuracanth) shark fossils from the Upper Triassic, Maleri Formation, India: Journal of the Geological Society of India, v. 21, p. 3947.
Jain S.L., Robinson P.L., and RoyChowdhury T.K., 1964, A new vertebrate fauna from the Triassic of the Deccan: Quaternary Journal of the Geological Society of London, v. 120, p. 115124.
Johns M.J., Albanesi G.L., and Voldman G.G., 2014, Freshwater shark teeth (Family Lonchidiidae) from the Middle–Upper Triassic (Ladinian–Carnian) Paramillo Formation in the Mendoza, Precordillera, Argentina: Journal of Vertebrate Paleontology, v. 34, p. 512523.
Johnson G.D., 1981, Hybodontoidei (Chondrichthyes) from the Wichita-Albany Group (Early Permian) of Texas: Journal of Vertebrate Paleontology, v. 1, p. 141.
Johnson G.D., 2003, Dentitions of Barbclabornia (new genus, Chondrichthyes: Xenacanthiformes) from the Upper Palaeozoic of North America: Mitteilungen aus dem Museum für Naturkunde in Berlin, Geowissenschaftliche Reihe, v. 6, p. 125160.
Klug S., Tütken T., Wings O., Pfretzschner H., and Martin T., 2010, A Late Jurassic freshwater shark assemblage (Chondrichthyes, Hybodontiformes) from the southern Junggar Basin, Xinjiang, Northwest China: Palaeodiversity and Palaeoenvironments, v. 90, p. 241257.
Maisey J.G., 1975, The interrelationships of phalacanthous selachians: Neues Jahrbuch für Geologie und Paläontologie Monatshefte, v. 9, p. 553567.
Maisey J.G., 1983, Cranial anatomy of Hybodus basanus Egerton from the Lower Cretaceous of England: American Museum Novitates, v. 2758, p. 164.
Maisey J.G., 1987, Cranial anatomy of the Lower Jurassic shark Hybodus reticulatus (Chondrichthyes: Elasmobranchii), with comments on hybodontid systematics: American Museum Novitates, v. 2878, p. 139.
Maisey J.G., 1989, Hamiltonichthys mapesi, g. & sp. nov. (Chondrichthyes; Elasmobranchii), from the Upper Pennsylvanian of Kansas: American Museum Novitates, v. 2931, p. 142.
Manzanares E., Pla C., Martínez-Pérez C., Ferrón H., and Botella H., 2016, Lonchidion derenzii, sp. nov., a new lonchidiid shark (Chondrichthyes, Hybodontiforms) from the Upper Triassic of Spain, with remarks on lonchidiid enameloid: Journal of Vertebrate Paleontology, DOI: 10.1080/02724634.2017.1253585
Mukherjee D., and Ray S., 2014, A new Hyperodapedon (Archosauromorpha, Rhynchosauria) from the Upper Triassic of India: implications for rhynchosaur phylogeny: Palaeontology, v. 57, p. 12411276.
Mukherjee D., Ray S., Chandra S., Pal S., and Bandyopadhyay S., 2012, Upper Gondwana succession of the Rewa basin, India: understanding the interrelationship of lithologic and stratigraphic variables: Journal of the Geological Society of India, v. 79, p. 563575.
Murry P.A., 1981, A New species of freshwater hybodont from the Dockum Group (Triassic) of Texas: Journal of Paleontology, v. 55, p. 603607.
Owen R., 1846, Lectures on the Comparative Anatomy and Physiology of the Vertebrate Animals. Delivered at the Royal College of Surgeons of England in 1844 and 1846. Part 1: Fishes: London, Longman, Brown, Green, and Longmans, 308 p.
Patnaik R., 2003, Reconstruction of Upper Siwalik palaeoecology and palaeoclimatology using microfossil palaeocommunities: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 97, p. 133150.
Patterson C., 1966, British Wealden sharks: Bulletin of the British Museum (Natural History), v. 11, p. 283350.
Prasad G.V.R., and Cappetta H., 1993, Late Cretaceous selachians from India and the age of the Deccan Traps: Palaeontology, v. 36, p. 231248.
Prasad G.V.R., and Sahni A., 1987, Coastal-plain microvertebrate assemblage from the terminal Cretaceous of Asifabad, Andhra Pradesh: Journal of the Palaeontological Society of India, v. 32, p. 519.
Prasad G.V.R., Manhas B.K., and Arratia G., 2004, Elasmobranch and actinopterygian remains from the Jurassic and Cretaceous of India, in Arratia, G., and Tintori, A., eds., Mesozoic Fishes 3: Systematics, Paleoenvironments and Biodiversity: München, Germany, Verlag Dr. Friedrich Pfeil, p. 625638.
Prasad G.V.R., Singh K., Parmar V., Goswami A., and Sudan C.S., 2008, Hybodont shark teeth from continental Upper Triassic deposits of India, in Arratia, G., Schultze, H.-P., and Wilson, M.V.H., eds., Mesozoic Fishes 4: Homology and Phylogeny: München, Germany, Verlag Dr. Friedrich Pfeil, p. 413432.
Ray S., 2015, A new Late Triassic traversodontid cynodont (Therapsida, Eucynodontia) from India: Journal of Vertebrate Paleontology, DOI: 10.1080/02724634.2014.930472.
Ray S., Bhat M.S., Mukherjee D., and Datta P.M., 2016, Vertebrate fauna from the Late Triassic Tiki Formation of India: new finds and their biostratigraphic implications: Palaeobotanist, v. 65, p. 4759.
Reed S.J.B., 2005, Electron Probe Analysis and Scanning Electron Microscopy in Geology: Cambridge, UK, Cambridge University Press, 189 p.
Rees J., 2008, Interrelationships of Mesozoic hybodont sharks as indicated by dental morphology—preliminary results: Acta Geologica Polonica, v. 58, p. 217221.
Rees J., and Underwood C.J., 2002, The status of the shark genus Lissodus Brough, 1935, and the position of nominal Lissodus species within the Hybodontoidea (Selachii): Journal of Vertebrate Paleontology, v. 22, p. 471479.
Reif W.E., 1973, Morphologie und Ultrastruktur des Hai−Schmelzes: Zoologica Scripta, v. 2, p 231250.
Sahni M.R., and Tewari A.P., 1958, New unionids from the Triassic (Gondwana) rocks of Tihki, Vindhya Pradesh and Maleri, Hyderabad, Deccan: Records of the Geological Survey of India, v. 87, p. 406417.
Sankey J.T., 2008, Vertebrate Paleoecology from microsites, Talley Mountain, Upper Aguja Formation (Late Cretaceous), Big Bend National Park, Texas, in Sankey, J.T., and Baszio, S., eds., Vertebrate Microfossil Assemblages: Their Role in Paleoecology and Paleobiogeography: Bloomington, Indiana, Indiana University Press, p. 6177.
Sire J.Y., Donoghue P.C.J., and Vickaryous M.K., 2009, Origin and evolution of the integumentary skeleton in non-tetrapod vertebrates: Journal of Anatomy, v. 214, p. 409440.
Shimada K., 2002, Dental homologies in lamniform sharks (Chondrichthyes: Elasmobranchii): Journal of Morphology, v. 251, p. 3872.
Shimada K., 2005, Types of tooth sets in the fossil record of sharks, and comments on reconstructing dentitions of extinct sharks: Journal of Fossil Research, v. 38, p. 141145.
Smith J.B., 2005, Heterodonty in Tyrannosaurus rex: implications for the taxonomic and systematic utility of theropod dentitions: Journal of Vertebrate Paleontology, v. 25, p. 865887.
Smith J.B., Vann D.R., and Dodson P., 2005, Dental morphology and variations in theropod dinosaurs: implications for the taxonomic identification of isolated teeth: Anatomical Record, v. 285A, p. 699736.
Stensiö E.A., 1921, Triassic Fishes from Spitsbergen. Part IA: Vienna, 307 p.
Tanner E.H., Spielmann J.A., and Lucas S.G., 2013, The Triassic System: new developments in Stratigraphy and Paleontology: Bulletin of the New Mexico Museum of Natural History and Science, v. 61, p. 1612.
Teixeira C., 1956, Sur un hybodontide du Karroo del’Angola: Revista da Faculdade de Ciencias, Lisboa, Series C, Ciencias Naturais, v. 5, p. 135136.
Underwood C.J., and Rees J., 2002, Selachian faunas from the earliest Cretaceous Purbeck Group of Dorset, southern England: Special Papers in Palaeontology, v. 68, p. 107119.
Wang N.-Z., Zhang X., Zhu M., and Zhao W.-J., 2009, A new articulated hybodontoid from Late Permian of northwestern China: Acta Zoologica (Stockholm), v. 90, p. 159170.
Whitenack L.B., and Gottfried M.D., 2010, A morphometric approach for addressing tooth-based species delimitation in fossil mako sharks, Isurus (Elasmobranchii: Lamniformes): Journal of Vertebrate Paleontology, v. 30, p. 1725.
Yadagiri P., 1986, Lower Jurassic lower vertebrates from Jurassic Kota Formation, Pranhita-Godavari Valley of India: Journal of the Palaeontological Society of India, v. 31, p. 8996.
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