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The oldest turritelline gastropods: from the Oxfordian (Upper Jurassic) of Kutch, India

Published online by Cambridge University Press:  01 March 2018

Shiladri S. Das
Affiliation:
Geological Studies Unit, Indian Statistical Institute, 203, Barrackpore Trunk Road, Kolkata-700108, India 〈shiladri@gmail.com〉〈sandipsaha.ju@gmail.com〉
Sandip Saha
Affiliation:
Geological Studies Unit, Indian Statistical Institute, 203, Barrackpore Trunk Road, Kolkata-700108, India 〈shiladri@gmail.com〉〈sandipsaha.ju@gmail.com〉
Subhendu Bardhan
Affiliation:
Department of Geological Sciences, Jadavpur University, Kolkata-7000032, India 〈sbardhan12@gmail.com〉
Sumanta Mallick
Affiliation:
Department of Geology, Triveni Devi Bhalotia College, Raniganj-713347, India 〈sumanta.geol87@gmail.com〉
Warren D. Allmon
Affiliation:
Paleontological Research Institution, and Department of Earth and Atmospheric Sciences, Cornell University, 1259 Trumansburg Road, Ithaca, New York, 14850USA 〈wda1@cornell.edu〉

Abstract

Turritellid gastropods are important components of many Cretaceous–Recent fossil marine faunas worldwide. Their shell is morphologically simple, making homoplasy widespread and phylogenetic analysis difficult, but fossil and living species can be recognized based on shell characters. For many decades, it has been the consensus that the oldest definite representatives of Turritellidae are from the Lower Cretaceous, and that pre-Cretaceous forms are homeomorphs. Some morphological characters of the present turritelline species resemble those of mathildoids, but many diagnostic characters clearly separate these two groups. We here describe and/or redescribe—based on examination of more than 2600 near complete specimens—four species from the Upper Jurassic Dhosa Oolite Member of the Chari Formation in Kutch, western India, and demonstrate that they are members of Turritellidae, subfamily Turritellinae, on the basis of diagnostic characters including apical sculptural ontogeny (obtained from SEM study), spiral sculpture, and growth line patterns. The four species are in order of abundance, Turritella jadavpuriensis Mitra and Ghosh, 1979; Turritella amitava new species; Turritella jhuraensis Mitra and Ghosh, 1979, and Turritella dhosaensis new species. The turritelline assemblages occur only on the northeastern flank of the Jhura dome (23°24’47.57”N, 69°36’09.26”E). Age of the Dhosa Oolite has recently been confirmed based on multiple ammonite species. All these points indicate that these fossils are the oldest record of the family Turritellidae—by almost 30 million years—in the world.

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Copyright © 2018, The Paleontological Society 

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References

Abbass, H.L., 1962, The English Cretaceous Turritellidae and Mathildidae (Gastropoda): Bulletin of the British Museum (Natural History) Geology, v. 7, p. 173196.Google Scholar
Alberti, M., Pandey, D.K., Hethke, M., and Fürsich, F.T., 2015, Ammonites of the subfamily Mayaitinae Spath, 1928 from the Oxfordian of Kachchh, western India: Geobios, v. 48, p. 85130.Google Scholar
Allison, R.C., 1965, Apical classification in turritellid classification with a description of Cristispira pugetensis gen. et sp. nov.: Palaeontology, v. 8, p. 666680.Google Scholar
Allmon, W.D., 1994, Patterns and processes of heterochrony in turritelline gastropods, Lower Tertiary, U.S. Gulf and Atlantic coastal plains: Journal of Paleontology, v. 68, p. 8095.Google Scholar
Allmon, W.D., 1996, Systematics and evolution of Cenozoic American Turritellidae (Mollusca: Gastropoda) I: Paleocene and Eocene coastal plain species related to “Turrritella mortoni Conrad” and “Turritella humerosa Conrad”: Palaeontographica Americana, v. 59, p. 1134.Google Scholar
Allmon, W.D., 2007, Cretaceous marine nutrients, greenhouse carbonates, and the abundance of turritelline gastropods: Journal of Geology, v. 115, p. 509524.CrossRefGoogle Scholar
Allmon, W.D., 2011, Natural history of turritelline gastropods (Cerithiodea: Turritellidae): a status report: Malacologia, v. 54, p. 159202.Google Scholar
Allmon, W.D., and Cohen, P.A., 2008, Paleoecological significance of turritelline gastropod dominated limestones from the mid-Cretaceous of Texas and Oklahoma: Cretaceous Research, v. 29, p. 6577.Google Scholar
Allmon, W.D., and Harris, W.B., 2008, A new species of turritelline gastropod from a turritelline-dominated limestone in the Paleocene of North Carolina: Journal of Paleontology, v. 82, p. 442446.Google Scholar
Allmon, W.D., Nieh, J.C., and Norris, R.D., 1990, Drilling and peeling of turritelline gastropods since the Late Cretaceous: Palaeontology, v. 33, p. 595611.Google Scholar
Bandel, K., 1991, Ontogenetic changes reflected in the morphology of the molluscan shell, in Schmidt-Kittler, N., and Vogel, K., eds., Constructional Morphology and Evolution: Berlin, Springer Verlag, p. 211230.Google Scholar
Bandel, K., 1993, Caenogastropoda during Mesozoic times: Scripta Geologica, Special Issue, v. 2, p. 756.Google Scholar
Bandel, Κ., 1995, Mathildoidea (Gastropoda, Heterostropha) from the Late Triassic St. Cassian Formation: Scripta Geologica, v. 111, p. 183.Google Scholar
Bandel, K., 2006, Families of the Cerithioidea and related superfamilies (Palaeo-Caenogastropoda: Mollusca) from the Triassic to the Recent characterized by protoconch morphology—including the description of new taxa: Freiberger Forschungshefte C, v. 511, p. 59138.Google Scholar
Bandel, K., and Kowalke, T.H., 1997, Cretaceous Laxispira and a discussion on the monophyly of vermetids and turritellids (Caenogastropoda, Mollusca): Geologica et Palaeontologica, v. 31, p. 257274.Google Scholar
Bandel, K., Nützel, A., and Yancey, T.E., 2002, Larval shells and shell microstructures of exceptionally well-preserved Late Carboniferous gastropods from the Buckhorn Asphalt deposit (Oklahoma, USA): Senckenbergiana Lethaea, v. 82, p. 639689.Google Scholar
Bardhan, S., Chattopadhyay, D., Mondal, S., Das, S.S., Mallick, S., Roy, A., and Chanda, P., 2012, Record of intense predatory drilling from Upper Jurassic bivalves of Kutch, India: implications for the history of biotic interaction: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 317, p. 153161.Google Scholar
Bardhan, S., Mallick, S., and Das, S.S., 2014, Palaeobiogeographic constraints on drilling gastropod predation: a case study from the Miocene Khari Nadi Formation in Kutch, Gujarat: Special Publication of the Palaeontological Society of India, v. 5, p. 205213.Google Scholar
Beu, A.G., 2010, Marine Mollusca of isotope stages of the last 2 million years in New Zealand. Part 3.Gastropoda (Vetigastropoda—Littorinimorpha): Journal of the Royal Society of New Zealand, v. 40, p. 59180.Google Scholar
Bieler, R., 1995, Mathildidae from New Caledonia and the Loyalty Islands (Gastropoda: Heterobranchia), in Bouchet, P., ed., Résultats des Campagnes MUSORSTOM, Volume 14: Mémoires du Muséum National de Histoire Naturelle, v. 167, p. 595641.Google Scholar
Biswas, S.K., 1977, Mesozoic rock-stratigraphy of Kutch: The Quarterly Journal of the Geological Mining and Metallurgical Society of India, v. 49, p. 152.Google Scholar
Biswas, S.K., 1982, Rift basins in western margin of India and their hydrocarbon prospects with special reference to Kutch basin: American Association of Petroleum Geologists Bulletin, v. 66, p. 14971513.Google Scholar
Biswas, S.K., 1991, Stratigraphy and sedimentary evolution of the Mesozoic basin of Kutch, western India, in Tandon, S.K., Pant, C.C., and Casshyap, S.M., eds., Sedimentary Basins of India: Tectonic Context, Nainital, Gyanodaya Prakashan, p. 74103.Google Scholar
Conrad, T.A., 1865, Descriptions of new Eocene shells from Enterprise, Mississippi: American Journal of Conchology, v. 1, p. 137141.Google Scholar
Cox, L.R., 1960, Thoughts on the classification of the Gastropoda: Journal of Molluscan Studies, v. 33, p. 239261.Google Scholar
Cuvier, G., 1797, Tableau Elementaire de l’Histoire Naturelle des Animaux: Paris, Baudouin, 710 p.Google Scholar
Dacque, E., 1905, Beiträge zur Geologie des Somalilandes, 2. Teil. Oberer Jura: Beiträge zur Paläontologie und Geologie Österreich-Ungarns und des Orients, v. 17, p. 119160.Google Scholar
Datta, K., 1992, Facies, fauna and sequence: an integrated approach in the Jurassic Patcham and Chari Formations, Kutch, India [Ph.D. thesis]: Jadavpur University, Kolkata, India, 167 p.Google Scholar
DeVries, T.J., 2007, Cenozoic Turritellidae (Gastropoda) from southern Peru: Journal of Paleontology, v. 81, p. 331351.CrossRefGoogle Scholar
Eames, F.E., 1952, On the ages of certain Upper Tertiary beds of Peninsular India and Ceylon: Geological Magazine, v. 87, p. 233252.Google Scholar
Edwards, C.W., 1980, Early Mesozoic marine fossils from central Alexander Island: British Antarctic Survey Bulletin, v. 49, p. 3358.Google Scholar
Ellisor, A.C., 1918, Species of Turritella from the Buda and Georgetown limestones of Texas: University of Texas Bulletin, v. 1840, p. 118.Google Scholar
Ferrari, S.M., 2012, The genera Cryptaulax and Procerithium (Procerithiidae, Caenogastropoda) in the Early Jurassic of Patagonia, Argentina: Alcheringa, v. 36, p. 323336.CrossRefGoogle Scholar
Fleming, J., 1822, The Philosophy of Zoology or a General View of the Structure, Functions and Classifications of Animals: Edinburgh, Hurst, v. 2, p. 1618.Google Scholar
Frýda, J., Nützel, A., and Wagner, P.J., 2008, Paleozoic Gastropoda, in Ponder, W.F., and Lindberg, D.R., eds., Phylogeny and Evolution of the Mollusca: Berkeley, University of California Press, p. 239270.Google Scholar
Fürsich, F.T., 1984, Benthic macro invertebrate associations from the Boreal Upper Jurassic of Milne Land, central East Greenland: Grønlands Geologiske Undersøgelse, Bulletin, v. 149, 72 p.Google Scholar
Fürsich, F.T., and Heinze, M., 1998, Contributions to the Jurassic of Kutch, western India, VI, the bivalve fauna, III, subclass Palaeoheterodonata (Order Trigonioidia): Beringeria, v. 21, p. 151168.Google Scholar
Fürsich, F.T., and Pandey, D.K., 2003, Sequence stratigraphic significance of sedimentary cycles and shell concentrations in the Upper Jurassic–Lower Cretaceous of Kutch, Western India: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 193, p. 285309.Google Scholar
Fürsich, F.T., Oschmann, W., Singh, I.B., and Jaitly, A.K., 1992, Hardgrounds, reworked concretion levels and condensed horizons in the Jurassic of Western India: their significance for basin analysis: Journal of the Geological Society, v. 149, p. 313331.Google Scholar
Fürsich, F.T., Pandey, D.K., Collomon, J.H., Jaitly, A.K., and Singh, I.B., 2001, Marker beds in the Jurassic of the Kutch basin, western India: their depositional environment and sequence-stratigraphic significance: Journal of the Palaeontological Society of India, v. 46, p. 173198.Google Scholar
Futterer, K., 1894, Beiträge zur Kenntniss des Jura in Ost-Afrika: Zeitschrift der Deutschen Geologischen Gesellschaft, v. 46, p. 149.Google Scholar
Gabb, W.M., 1860, Descriptions of new species of American Tertiary and Cretaceous fossils: Journal of the Academy of Natural Sciences of Philadelphia, ser. 2, v. 4, p. 375406.Google Scholar
Gardner, J.A., 1935, The Midway Group of Texas: University of Texas Bulletin, v. 3301, 403 p.Google Scholar
Golikov, A.N., and Starobogatov, Y., 1975, Systematics of prosobranch gastropods: Malacologia, v. 15, p. 185232.Google Scholar
Gradstein, F.M, Ogg, J.G., Schmitz, M.D., and Ogg, G.M., (coordinators) 2012, The Geologic Time Scale 2012: Boston, Elsevier, 2 volumes plus chart, 1176 p.Google Scholar
Gründel, J., and Nützel, A., 2013, Evolution and classification of Mesozoic mathildoid gastropods: Acta Palaeontologica Polonica, v. 58, p. 803826.Google Scholar
Harzhauser, M., Reuter, M., Piller, W.E., Berning, B., Kroh, A., and Mandic, O., 2009, Oligocene and Early Miocene gastropods from Kutch (NW India) document an early biogeographic switch from western Tethys to Indo Pacific: Paläontologische Zeitschrift, v. 83, p. 333372.CrossRefGoogle Scholar
Hikuroda, D.C., and Kaim, A., 2007, New gastropods from the Jurassic of Orville Coast, eastern Ellsworth Land, Antarctica: Antarctic Science, v. 19, p. 115124.Google Scholar
Hudleston, W.H., 1892, A monograph of the Inferior Oolite gastropods: Palaeontographical Society Monographs, 514 p.Google Scholar
Kaim, A., 2004, The evolution of conch ontogeny in Mesozoic open sea gastropods: Acta Palaeontologia Polonica, v. 62, p. 1183.Google Scholar
Kauffman, E.G., 1977, Evolutionary rates and biostratigraphy, p. 109142. in Kauffman, E.G., and Hazel, J.E., eds., Concepts and Methods of Biostratigraphy: Stroudsburg, Pennsylvania, Dowden, Hutchinson & Ross, 658 p.Google Scholar
Knight, J.B., Batten, R.L., Yochelson, E.L., and Cox, L.R., 1960, Paleozoic and some Mesozoic Caenogastropoda and Opisthobranchia, in Moore, R.C., ed., Treatise on Invertebrate Paleontology, Pt. I, Mollusca 1: Boulder, CO and Lawrence, KS, Geological Society of America and University of Kansas Press, p. I310I330.Google Scholar
Kotaka, T., 1978, World-wide biostratigraphic correlation based on turritellid phylogeny: Veliger, v. 21, p. 89196.Google Scholar
Kowalewski, M., 2002, The fossil record of predation: an overview of analytical methods, in Kowalewski, M., and Kelley, P.H., eds., The Fossil Record of Predation: Paleontological Society Special Papers, v. 8, p. 342.Google Scholar
Kulkarni, K.G., Kapoor, S.B., and Borkar, V.D., 2010, Molluscan fauna from the Miocene sediments of Kachchh, Gujarat, India—Part 3. Gastropods: Journal of Earth System Science, v. 119, p. 307341.Google Scholar
Ladd, H.S., 1972, Cenozoic fossil mollusks from western Pacific Islands; gastropods (Turritellidae through Strombidae): U.S. Geological Survey Professional Paper 532, 79 p.Google Scholar
Lamarck, J.B.de, 1799, Prodrome d’une nouvelle classification des coquilles: Memories de la Societé d’Histoire Naturelle de Paris, v. 1, p. 6391.Google Scholar
Lamarck, J.B.de, 1804, Suite des memoires sur les fossiles des environs de Paris: Annales de Muséum National d’Histoire Naturelle, v. 5, p. 2836.Google Scholar
Laube, G.C., 1867, Die Gastropoden des braunen Jura von Balin: Denkschriften der Kaiserlichen Akademie der Wissenschaften, v. 28, p. 128.Google Scholar
Linnaeus, C., 1758, Systema Naturae per Regna Tria Naturae: Secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis, 10th ed., Stockholm, Laurentius Salvius, 824 p.Google Scholar
Lisson, C.I., 1925, Algunos fósiles de Perú: Boletín de la Sociedad Geológica del Perú, v. 1, p. 2330.Google Scholar
Lovén, S.L., 1847, Malacozoologi Öfversigt af Kongliga Vetenskaps-Akademiens Förhandlin-gar, v. 4, p. 175199.Google Scholar
Lydeard, C., Holznagel, W.E., Glaubrecht, M., and Ponder, W.F., 2002, Molecular phylogeny of a circum-global, diverse gastropod superfamily (Cerithioidea: Mollusca: Caenogastropoda): pushing the deepest phylogenetic limits of mitochondrial LSU rDNA sequences: Molecular Phylogenetics and Evolution, v. 22, p. 399406.Google Scholar
MacNeil, F.S., and Dockery, D.T. III, 1984, Lower Oligocene Gastropoda, Scaphopoda, and Cephalopoda of the Vicksburg Group in Mississippi: Mississippi Geological Survey Bulletin, v. 124, 415 p.Google Scholar
Malarkodi, N., Fayazudeen, P.J., and Mallikarjuna, U.B., 2009, Palaeoecological significance of turritelline dominated gastropod assemblage from the infratrappean beds of the Rajahmundry area, Andhra Pradesh: Journal of the Palaeontological Society of India, v. 54, p. 159164.Google Scholar
Mallick, S., Bardhan, S., Paul, S., Mukherjee, S., and Das, S.S., 2013, Intense naticid drilling predation on turritelline gastropods from below the K-T boundary at Rajahmundry, India: Palaios, v. 28, p. 683696.Google Scholar
Mallick, S., Bardhan, S., Das, S.S., Paul, S., and Goswami, P., 2014, Naticid drilling predation on gastropod assemblages across the K-T boundary in Rajahmundry, India: New evidence for escalation hypothesis: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 411, p. 216228.Google Scholar
Marwick, J., 1957, Generic revision of the Turritellidae: Proceedings of the Malacological Society of London, v. 32, p. 144166.Google Scholar
Meier, H., and Meiers, K., 1988, Die Gastropodenfauna der “Angulata-Zone” des Steinbruchs “Reckingerwald” bei Brouch: Travaux Scientifiques du Musée National d’Histoire Naturelle de Luxembourg, v. 13, p. 188.Google Scholar
Merriam, C.W., 1941, Fossil turritellas from the Pacific coast region of North America: University of California Publications in Geological Sciences Bulletin, v. 26, p. 1214.Google Scholar
Mitra, K.C., and Ghosh, D.N., 1979, Jurassic turritellas from Kutch, Gujarat: Quarterly Journal of the Geological Mining and Metallurgical Society of India, v. 51, p. 119122.Google Scholar
Mitra, K.C., Bardhan, S., and Bhattacharya, D., 1979, A study of Mesozoic stratigraphy of Kutch, Gujarat, with special reference to rock-stratigraphy and biostratigraphy of Keera dome: Bulletin of the Indian Geological Association, v. 12, p. 129143.Google Scholar
Möricke, W., and Steinmann, G., 1896, Die Tertiäirbildungen des nördlichen Chile und ihre Fauna: Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, v. 10, p. 533612.Google Scholar
Münster, G., 1841, Beiträge zur Geognosie und Petrefacten-Kunde des südtirolischen Tirols vorzüglich der Schichten von St. Cassian. II. Beschreibung und Abbildung der in den Kalkmergelschichten von St. Cassian gefundenen Versteinerungen: Beiträge zur Petrefacten-Kunde, v. 4, p. 25152.Google Scholar
Nützel, A., 1998, Über die Stammesgeschichte der Ptenoglossa (Gastropoda): Berliner Geowissenschaftliche Abhandlungen, Reihe E, v. 26, p. 1229.Google Scholar
Nützel, A., 2002, The Late Triassic species Cryptaulax? bittneri (Mollusca: Gastropoda: Procerithiidae) and remarks on early aspects of the Mesozoic marine revolution: Paläontologische Zeitschrift, v. 76, p. 5763.Google Scholar
Nützel, A., and Bandel, K., 2000, Goniasmidae and Orthonemidae: two new families of Palaeozoic Caenogastropoda: Neues Jahrbuch für Geologie und Paläontologie, Monatshefte, v. 2000, p. 557569.CrossRefGoogle Scholar
Nützel, A., and Erwin, D.H., 2002, Battenizyga, a new Early Triassic gastropod genus with a discussion of the caenogastropod evolution at the Permian/Triassic boundary: Paläontologische Zeitschrift, v. 76, p. 2127.Google Scholar
Nützel, A., and Pan, H.-Z., 2005, Late Paleozoic evolution of the Caenogastropoda: larval shell morphology and implications for the Permian/Triassic mass extinction event: Journal of Paleontology, v. 79, p. 11751188.Google Scholar
Palmer, K.V.W., 1937, The Claibornian Scaphopoda, Gastropoda, and dibranchiate Cephalopoda of the southern United States: Bulletins of American Paleontology, v. 7, pt. 1, 548 p.Google Scholar
Paul, G., Das, A., Bardhan, S., and Mondal, S., 2013, Predation on Recent turritelline gastropods from the Indian subcontinent and comparison with a revised global database: Malacologia, v. 56, p. 193213.Google Scholar
Pandey, D.K., Fürsich, F.T., and Sha, J., 2009, Interbasinal marker intervals—a case study from the Jurassic basins of Kachchh and Jaisalmer, western India: Science in China, Series D: Earth Sciences, v. 52, p. 19241931.Google Scholar
Ponder, W.F., and Lindberg, D.R., 1997, Towards a phylogeny of gastropod molluscs: an analysis using morphological characters: Zoological Journal of the Linnean Society, v. 119, p. 83265.Google Scholar
Ponder, W.F., Colgan, D.J., Healy, J.M., Nützel, A., Simone, L.R.L., and Strong, E.E., 2008, Caenogastropoda, in Ponder, W.F., and Lindberg, D.R., eds., Evolution and Phylogeny of the Mollusca: Berkeley, University of California Press, p. 331383.Google Scholar
Popenoe, W.P., 1937, Upper Cretaceous Mollusca from southern California: Journal of Paleontology, v. 11, p. 379402.Google Scholar
Raup, D.M., and Stanley, S.M., 1978, Principles of Paleontology, 2nd ed., San Francisco, W.H. Freeman, 481 p.Google Scholar
Roy, A., Bardhan, S., Das, S., Mondal, S., and Mallick, S., 2012, Systematic revision and palaeobiogeography of Perisphinctes Waagen (Ammonoidea) from the Oxfordian of Kutch, India: stratigraphic and evolutionary implications: Palaeoworld, v. 2, p. 167192.Google Scholar
Saul, L.R., 1983, Turritella zonation across the Cretaceous-Tertiary boundary, California: University of California Publications in Geological Sciences, v. 125, p. 1149.Google Scholar
Schröder, M., 1995, Frühontogenetische Schalen jurrassischer und unterkretazischer Gastropoden aus Norddeutschland und Polen: Palaeontographica, Abt. A, v. 238, p. 195.CrossRefGoogle Scholar
Sepkoski, J.J. Jr., 1982, A compendium of fossil marine families: Milwaukee Public Museum Contributions in Biology and Geology, v. 83, p. 1156.Google Scholar
Singh, I.B., 1989, Dhosa Oolite—a transgressive condensation horizon of Oxfordian age in Kachchh, western India: Bulletin of the Geological Society of India, v. 34, p. 152160.Google Scholar
Smriglio, C., Prkiæ, J., Di Giulio, A., and Mariottini, P., 2007, Two new mathildids from the Mediterranean Sea (Gastropoda, Heterobranchia, Mathildidae): Basteria, v. 71, p. 177188.Google Scholar
Sohl, N.F., 1977, Utility of gastropods in biostratigraphy, in Kauffman, E.G., and Hazel, J.E., eds., Concepts and Methods of Biostratigraphy: Stroudsburg, Pennsylvania, Dowden, Hutchinson & Ross, p. 519540.Google Scholar
Sowerby, J.D.C., 1840, Systematic list of organic remains. Appendix to Grant, C.W., Memoir to illustrate a geological map of Cutch: Transactions of the Geological Society of London, v. 2, p. 327329.Google Scholar
Spath, L.F., 1927–1933, Revision of the Jurassic cephalopod fauna of Kachh (Cutch): Memoirs of the Geological Survey of India, Palaeontologia Indica, New Series, v. 9, p. 1945.Google Scholar
Squires, R.L., 1988, Rediscovery of the type locality of Turritella andersoni and its geologic age implications for West Coast Eocene strata, in Filewicz, M.V., and Squires, R.L., eds., Paleogene Stratigraphy, West Coast of North America: Pacific Section, SEPM, West Coast Symposium, v. 58, p. 203208.Google Scholar
Squires, R.L., and Saul, L.R., 2006, Additions and refinements to Aptian to Santonian (Cretaceous) Turritella (Mollusca, Gastropoda) from the Pacific Slope of North America: Veliger, v. 48, p. 4660.Google Scholar
Stenzel, H.B., 1940, New zone in Cook Mountain Formation, the Crassatella texalta Harris-Turritella cortezi Bowles zone: American Association of Petroleum Geologists Bulletin, v. 24, p. 16631675.Google Scholar
Strong, E.E., Colgan, D.J., Healy, J.M., Lydeard, C., Ponder, W.F., and Glaubrecht, M., 2011, Phylogeny of the gastropod superfamily Cerithioidea using morphology and molecules: Zoological Journal of the Linnean Society, v. 162, p. 4389.Google Scholar
Tekin, U.K., 1999, Biostratigraphy and systematics of late Middle to Late Triassic radiolarians from the Taurus Mountains and Ankara region, Turkey: Geologisch-Paläontologische Mitteilungen Innsbruck, v. 5, p. 1296.Google Scholar
Tracey, S., Todd, J.A., and Erwin, D.H., 1993, Mollusca: Gastropoda, in Benton, M.J., ed., The Fossil Record 2: London, Chapman and Hall, p. 137167.Google Scholar
Von Der Osten, E., 1957, A fauna from the Lower Cretaceous Barranquín Formation of Venezuela: Journal of Paleontology, v. 31, p. 571590.Google Scholar
Vredenburg, E., 1928, Descriptions of Mollusca from the post-Eocene Tertiary formation of north-western India: Gastropoda (in part) and Lamellibranchiata: Memoir of the Geological Survey of India, v. 50, p. 351506.Google Scholar
Wheeler, H.E., 1958, Primary factors in biostratigraphy: American Association of Petroleum Geologists Bulletin, v. 42, p. 640655.Google Scholar
Woodring, W.P., 1930, Upper Eocene orbitoid foraminifera from the western Santa Ynez range, California, and their stratigraphic significance: Transactions of the San Diego Society of Natural History, v. 6, p. 145170.Google Scholar
Woodring, W.P., 1931, Age of the orbitoid-bearing Eocene limestone and Turritella variata zone of the western Santa Ynez Range, California: Transactions of the San Diego Museum of Natural History, v. 625, p. 371388.Google Scholar
Waagen, W., 1875, Jurassic fauna of Kutch. The Cephalopoda: Palaeontologia Indica, series 9, v. 1, p. 107247.Google Scholar
Yokoyama, M., 1928, Mollusca from the oil-field of the island of Taiwan: Reports of the Imperial Geological Survey of Japan, v. 101, p. 1112.Google Scholar