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Unraveling species concepts for the Helicoprion tooth whorl

  • Leif Tapanila (a1) (a2) and Jesse Pruitt (a2)
Abstract

The genus Helicoprion (Chondricthyes, Euchondrocephali) is preserved primarily by a continuous spiral root that forms the base for more than 130 teeth. Helicoprion is found globally in Lower Permian marine rocks and at least 100 specimens exist in public collections worldwide. Ten species of the genus are reviewed in the context of new morphometric analyses conducted on dozens of specimens. Helicoprion whorls share a common inner spiral geometry that results in exponential growth of tooth and root dimensions. Novel growth equations permit calculation of whorl diameter, volution number and tooth count from incomplete specimens. The results of meristic and geometric analyses identify taxobases that distinguish three emended species concepts. Differentiation of form is evident among specimens only after the second volution or roughly the 85th tooth. Helicoprion davisii has widely spaced, stout teeth with tall cutting surfaces and is distinguished from H. bessonowi, which has narrow, closely spaced teeth with short cutting surfaces. Helicoprion ergassaminon is an intermediate form, having narrow, closely spaced teeth with tall cutting surfaces. Several large specimens in the study are too dissimilar to place in the new emended species concepts.

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Araki, H. 1980. Discovery of Helicoprion, a Chondrichthyes from Kesennuma City, Miyagi Prefecture, Japan. Journal of the Geological Society of Japan, 86:135137. (In Japanese)
Bamber, E. W., Taylor, G. C., and Procter, R. M. 1968. Carboniferous and Permian stratigraphy of northeastern British Columbia. Geological Survey of Canada, Paper, 68-15:125.
Bendix-Almgreen, S. E. 1966. New investigations on Helicoprion from the Phosphoria Formation of south-east Idaho, U.S.A. Biologiske Skrifter udgivet af det Kongelige Danske Videnskabernes Selskab, 14:154.
Blakey, R. C. 2012. Global paleogeography for Early Permian. Northern Arizona University. Images and supporting materials available athttp://jan.ucc.nau.edu/rcb7/280moll.jpg.
Bridges, L. W. and DeFord, R. K., 1962. Pre-Carboniferous Paleozoic rocks in central Chihuahua, Mexico. AAPG Bulletin, 45:98104.
Chen, X.-H., Cheng, L., and Yin, K.-G. 2007. The first record of Helicoprion Karpinsky (Helicoprionidae) from China. Chinese Science Bulletin, 52:22462251.
Chorn, J. 1978. Helicoprion (Elasmobranchii, Edestidae) from the Bone Spring Formation (Lower Permian) of west Texas. University of Kansas Paleontology Contribution Papers, 89:24.
Cortie, M. 1992. The form, function, and synthesis of the molluscan shell, p. 369387. InHargittai, I. and Pickover, C. A.(eds.), Spiral Symmetry, World Scientific.
Eastman, C. R. 1902. Some Carboniferous cestraciont and acanthodian sharks. Bulletin of the Museum of Comparative Zoology, Harvard University 39:5599.
Eaton, T. H. Jr. 1962. Teeth of edestid sharks. University of Kansas Publications, Museum of Natural History, 12:347362.
Hammer, Ø., Harper, D. A. T., and Ryan, P. D. 2001. PAST: Paleontological statistics software package for education and data analysis. Palaeontologia Electronica, 4:19.
Hanger, R. A., Strong, E. E., and Ashinhurst, T. 1994. Helicoprion sp. from the Pennsylvanian and Permian Antler Peak Limestone, Lander County, Nevada. Preliminary Geologic Map of the Snow Gulch Quadrangle, Humboldt and Lander Counties, Nevada. USGS Open-File Report, 94–436:2431.
Harwood, D. S. 1992. Stratigraphy of Paleozoic and lower Mesozoic rocks in the northern Sierra Terrane, California. USGS Bulletin, 1957:178.
Hay, O. P. 1907. A new genus and species of fossil shark related to Edestus Leidy. Science, 26:2224.
Hay, O. P. 1909. On the nature of Edestus and related genera, with descriptions of one new genus and three new species. Proceedings of the United States National Museum, 37:4361.
Hoffet, J. H. 1933. Étude géologique sur le centre de l'Indochine entre Tourane et le Mekong. Bulletin de la Service géologique du Indochine, 20:3154.
Huxley, T. H. 1880. On the application of the laws of evolution to the arrangement of the Vertebrata and more particularly the Mammalia. Proceedings of the Zoological Society of London, 649662.
Karpinsky, A. P. 1899. On the edestid remains and its new genus Helicoprion. Zapiski Imperatorskoy Akademii Nauk, 7:167. (In Russian)
Karpinsky, A. P. 1911. Notes on Helicoprion and other edestids. Izvestiya Imperatorskoy Akademii Nauk, 5:11051122. (In Russian)
Karpinsky, A. P. 1915. On the nature of the spiral organ of Helicoprion. Zapiski Ural'skogo Obshchestva Lyubiteley Estestvoznaniya 35:117145. (In Russian)
Kelly, M. A. and Zangerl, R. 1976. Helicoprion (Edestidae) in the Permian of west Texas. Journal of Paleontology, 50:992994.
Larson, E. E. and Birkeland, P. W. 1982. Putnam's Geology, 4th Edition. New York, Oxford University Press, 789p.
Larson, E. R. and Scott, J. B. 1955. Helicoprion from Elko County, Nevada. Journal of Paleontology, 29:918919.
Lebedev, O. A. 2009. A new specimen of Helicoprion Karpinsky, 1899 from Kazakhstanian Cisurals and a new reconstruction of its tooth whorl position and function. Acta Zoologica, 90:171182.
Logan, A. and McGugan, A. 1968. Biostratigraphy and faunas of the Permian Ishbel Group, Canadian Rocky Mountains. Journal of Paleontology, 42:11231139.
Lund, R. and Grogan, E. D. 1997. Relationships of the Chimaeriformes and the basal radiation of the Chondrichthyes. Reviews in Fish Biology and Fisheries, 7:65123.
McGugan, A. and Rapson, J. E. 1963. Permo-Carboniferous stratigraphy between Banff and Jasper, Alberta. Bulletin of Canadian Petroleum Geology, 11:150160.
Müllerried, F. K. G. 1945. El edéstido Helicoprion, encontrado por primera vez en Mexico, en el estado de Coahuila. Ciencia Mexicana, 6:208212.
Nassichuk, W. W. 1971. Helicoprion and Physonemus, Permian vertebrates from the Assistance Formation, Canadian Arctic Archipelago. Geological Survey of Canada, Bulletin, 192:8393.
Nassichuk, W. W. and Spinosa, C. 1970. Helicoprion sp., a Permian elasmobranch from Ellesmere Island, Canadian Arctic. Journal of Paleontology, 44:11301132.
Nyberg, K. G., Ciampaglio, C. N., and Wray, G. A. 2006. Tracing the ancestry of the great white shark, Carcharodon carcharias, using morphometric analyses of fossil teeth. Journal of Vertebrate Paleontology, 26:806814.
Obruchev, D. V. 1953. Edestid studies and the works by A. P. Karpinsky. Trudy Paleontologicheskogo Instituta Akademii Nauk SSSR, 45:185. (In Russian)
Obruchev, D. V. 1964. Subclass Holocephali, p. 238266. InOrlov, Y. A.(ed.), Holocephalans. Fundamentals of Palaeontology. Agnathans, Fishes, Nauka Publishers, Moscow.
Raup, D. M. 1966. Geometric analysis of shell coiling: general problems. Journal of Paleontology, 40:11781190.
Raup, D. M. 1967. Geometric analysis of shell coiling: coiling in ammonoids. Journal of Paleontology, 41:4365.
Siedlecki, S. A. 1970. Helicoprion from the Permian of Spitsbergen. Årbok Norsk Polarinstitute, 1968:3654.
Silberling, N. J. 1973. Geologic events during Permian–Triassic time along the Pacific margin of the United States, p. 345362. InLogan, A. and Hills, L. V.(eds.), The Permian and Triassic Systems and Their Mutual Boundary. Canadian Society of Petroleum Geologists Memoir 2.
Sour-Tovar, F., Quiroz-Barroso, A. Q., and Applegate, S. P. 2000. Presence of Helicoprion (Chondrichthyes, Elasmobranchii) in the Permian Patlanoaya Formation, Puebla, Mexico. Journal of Paleontology, 74:363366.
Tapanila, L., Pruitt, J., Pradel, A., Wilga, C. D., Ramsay, J. B., Schlader, R., and Didier, D. A. 2013. Jaws for a spiral-tooth whorl: CT images reveal novel adaptation and phylogeny in fossil Helicoprion. Biology Letters, 9:20130057.
Tchuvashov, B. I. 2001. Permian sharks of the family Helicoprionidae: stratigraphic and geographic distribution, ecology, a new member. Materialy po stratigrafii i palaeontologii Urala, 6:1227. (In Russian)
Teichert, C. 1940. Helicoprion in the Permian of Western Australia. Journal of Paleontology, 14:140149.
Vetz, N. Q. 2010. Geochronologic and isotopic investigation of the Koipato Formation, northwestern Great Basin, Nevada: implications for Late Permian–Early Triassic tectonics along the Western U.S. Cordillera. Unpublished MS thesis, Boise State University, 147p.
Wheeler, H. E. 1939. Helicoprion in the Anthracolithic of Nevada and California, and its stratigraphic significance. Journal of Paleontology, 13:103114.
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, 30:1725.
Williams, J. S. and Dunkle, D. H. 1948. Helicoprion-like fossils in the Phosphoria Formation. GSA Bulletin, 59:1362.
Woodward, H. 1886. On a remarkable ichthyodorulite from the Carboniferous series, Gascoyne, Western Australia. Geological Magazine, 3:17.
Yabe, H. 1903. On a Fusulina-limestone with Helicoprion in Japan. Journal of the Geological Society of Tokyo, 10:113.
Yochelson, E. L. 1968. Biostratigraphy of the Phosphoria, Park City, and Shedhorn Formations. USGS Professional Paper, 313-D:571660.
Zangerl, R. 1981. Chondrichthyes I. Paleozoic Elasmobranchii. Handbook of Paleoichthyology, vol. 3A, Gustav Fischer, New York, 113p.
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Journal of Paleontology
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