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Ontogeny, systematics, and evolution of the effaced Early Cambrian trilobites Peachella Walcott, 1910 and Eopeachella new genus (Olenelloidea)

Published online by Cambridge University Press:  14 July 2015

Mark Webster
Mark Webster*
Affiliation:
Department of the Geophysical Sciences, University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60637,
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Abstract

Although used in biostratigraphy and in studies of early Cambrian trilobite evolution, the olenelloid genus Peachella has received little research attention. The ontogenetic and evolutionary origins of its derived features—an effaced cephalon and grossly inflated genal spines—have remained mysterious. Based on examination of new and existing collections, P. iddingsi and P. brevispina are here described in detail, including aspects of their respective ontogenies and the first description of the thorax of P. iddingsi. A new monotypic genus, Eopeachella, is also described from recently collected material from the Delamar Member of the Pioche Formation, Nevada. Eopeachella angustispina n. gen. n. sp., is less derived and stratigraphically older than both Peachella species and bridges the morphological gap between Peachella and typical olenelloids. The study reveals that cephalic effacement was progressively attained during both ontogeny and phylogeny in the Eopeachella + Peachella clade. Comparative ontogeny with other olenelloids reveals that progressive effacement was a trend superimposed upon and independent of a conserved pattern of ontogenetic shape change in the glabella and did not represent a peramorphic “extension” of glabellar ontogeny. Genal spine inflation was also achieved progressively (in a proximal-to-distal direction) through both ontogeny and phylogeny in the Eopeachella + Peachella clade. Genal spine inflation that convergently arose in later trilobite groups may have been similarly ontogenetically dynamic. Discovery of E. angustispina and P. brevispina in the Delamar Member raises olenelloid diversity in this member to at least 20 species; a higher diversity than in any coeval unit.

Type
Research Article
Information
Journal of Paleontology , Volume 83 , Issue 2 , March 2009 , pp. 197 - 218
Copyright
Copyright © The Paleontological Society

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References

Bates, E. E. 1965. Stratigraphic analysis of the Cambrian Carrara Formation, Death Valley region, California-Nevada. Unpublished M.A. Thesis, University of California, Los Angeles, 228 pp.Google Scholar
Beecher, C. E. 1895. The larval stages of trilobites. American Geologist, 16: 166–197.Google Scholar
Brauckmann, C. 1974. Neue Trilobiten aus dem Kulm von Aprath bei Wuppertal (Unter-Karbon, Rheinisches Schiefer-Gebirge). Geologica et Palaeontologica, 8:113–117.Google Scholar
Brögger, W. C. 1886. Om alderen af Olenelluszonen i Nordamerika. Geologiska föreningens i Stockholm förhandlingen, 8:182–213.CrossRefGoogle Scholar
Callaghan, E. 1937. Geology of the Delamar District, Lincoln County, Nevada. Univeristy of Nevada Bulletin, 31(5):72 pp.Google Scholar
Chatterton, B. D. E. and Speyer, S. E. 1997. Ontogeny, p. 173–247. In Kaesler, R. L. (ed.), Treatise on Invertebrate Paleontology, Pt. O, Arthropoda 1, Trilobita, Revised, Volume 1. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Fortey, R. A. and Owens, R. M. 1990. Trilobites. p. 121–142. In McNamara, K. J. (ed.), Evolutionary Trends. Belhaven Press, London, 368 pp.Google Scholar
Fortey, R. A. and Owens, R. M. 1997. Evolutionary history, p. 249–287. In Kaesler, R. L. (ed.), Treatise on Invertebrate Paleontology, Pt. O, Arthropoda 1, Trilobita, Revised, Volume 1. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Fowler, E. 1999. Biostratigraphy of upper Dyeran strata of the Carrara Formation, Emigrant Pass, Nopah Range, California, p. 46–50. In Palmer, A. R. (ed.), Laurentia 99: V Field Conference of the Cambrian Stage Subdivision Working Group. International Subcommission on Cambrian Stratigraphy. Utah, Nevada, California, U.S.A., September 12–22, 1999. Institute for Cambrian Studies, Boulder, Colorado. [Reprinted in 2002 in Palmer, A. R. (ed.), Laurentia 2002. Cambrian Geology of Utah and Nevada: Facies Patterns and Regional Stratigraphy; Stratotype and Parastratotype Boundaries for Laurentian Stages. Informal Field Trip, May 9–14, 2002. Institute for Cambrian Studies, Boulder, Colorado.]Google Scholar
Grabau, A. W. 1936. Palaeozoic Formations in the Light of the Pulsation Theory. Volume I. Lower and Middle Cambrian Pulsations (second edition). University Press, National University of Peking.Google Scholar
Hague, A. 1883. Abstract of report on geology of the Eureka District, Nevada. Third Annual Report of the United States Geological Survey, 1881–1882:237–290.Google Scholar
Hahn, G., Hahn, R., and Brauckmann, C. 1992. Zur Phylogenie der Cystispininae (Trilobita: Karbon). Senckenbergiana lethaea, 72:91–120.Google Scholar
Hall, J. 1862. Supplementary note to the thirteenth report of the Regents on the State Cabinet. Fifteenth Annual Report of the Regents of the University of the State of New-York, on the condition of the State Cabinet of Natural History, and the Historical and Antiquarian Collection annexed thereto, p. 114.Google Scholar
Harrington, H. J. 1956. Olenellidae with advanced cephalic spines. Journal of Paleontology, 30:56–61.Google Scholar
Holm, G. 1887. Om Olenellus Kjerulfi Linrs. Geologiska Föreningens i Stockholm Förhandlingar, 9:493–522.CrossRefGoogle Scholar
Jell, P. A. and Adrain, J. M. 2003. Available generic names for trilobites. Memoirs of the Queensland Museum, 48:331–553.Google Scholar
Lagrange, J. E. 2002. Biostratigraphy of Olenelloid Trilobites from the Lower Cambrian of the Southeastern Marble Mountains: Pushing the Limits of the Resolution of the Fossil Record. Unpublished Senior Thesis, University of California, Riverside, Geology Museum, 44 p.Google Scholar
Lane, P. D. and Thomas, A. T. 1983. A review of the trilobite suborder Scutelluina. Special Papers in Palaeontology, 30:141–160.Google Scholar
Lieberman, B. S. 1998. Cladistic analysis of the Early Cambrian olenelloid trilobites. Journal of Paleontology, 72:59–78.CrossRefGoogle Scholar
Lieberman, B. S. 1999. Systematic revision of the Olenelloidea (Trilobita, Cambrian). Bulletin of the Peabody Museum of Natural History, Yale University, 35:1–150.Google Scholar
Lieberman, B. S. 2002. Phylogenetic analysis of some basal Early Cambrian trilobites, the biogeographic origins of the Eutrilobita, and the timing of the Cambrian Radiation. Journal of Paleontology, 76:692–708.2.0.CO;2>CrossRefGoogle Scholar
Lieberman, B. S. 2003. Biogeography of the Trilobita during the Cambrian radiation: Deducing geological processes from trilobite evolution. Special Papers in Palaeontology, 70:59–72.Google Scholar
Marcou, J. 1885. The “Taconic System” and its position in stratigraphic geology. Proceedings of the American Academy of Arts and Sciences, 20:174–256.CrossRefGoogle Scholar
Marcou, J. 1890. The Lower and Middle Taconic of Europe and North America. American Geologist, 5 + 6:78–102,221–233.Google Scholar
Mason, J. F. 1938. Cambrian faunal succession in Nevada and California. Journal of Paleontology, 12:287–294.Google Scholar
McNamara, K. J. 1978. Paedomorphosis in Scottish olenellid trilobites (Early Cambrian). Palaeontology, 21:635–655.Google Scholar
McNamara, K. J. 1986. The role of heterochrony in the evolution of Cambrian trilobites. Biological Reviews, 61:121–156.CrossRefGoogle Scholar
Mount, J. D. 1976. Early Cambrian faunas from eastern San Bernardino County, California. Bulletin of the Southern California Paleontological Society, 8:173–182.Google Scholar
Mount, J. D. 1980a. Characteristics of Early Cambrian faunas from eastern San Bernardino County, California. Paleontological tour of the Mojave Desert, California-Nevada. Southern California Paleontological Society Special Publication, 2:19–29.Google Scholar
Mount, J. D. 1980b. An Early Cambrian fauna from the Carrara Formation, Emigrant Pass, Nopah Range, Inyo County, California: A preliminary note, p. 78–80. In Mount, J. D. (ed.), Paleontological Tour of the Mojave Desert, California-Nevada. Southern California Paleontological Society Special Publication 2.Google Scholar
Nelson, C. A. 1976. Late Precambrian-Early Cambrian stratigraphic and faunal succession of eastern California and the Precambrian-Cambrian boundary, p. 31–42. In Moore, J. N. and Fritsche, A. E. (eds.), Depositional Environments of Lower Paleozoic Rocks in the White-Inyo Mountains, Inyo County, California. Pacific Coast Paleogeography Field Guide 1.Google Scholar
Nolan, T. B., Merriam, C. W., and Williams, J. S. 1956. The stratigraphic section in the vicinity of Eureka, Nevada. United States Geological Survey Professional Paper, 276:1–77.Google Scholar
Osmólska, H. 1962. Fammenian and Lower Carboniferous Cyrtosymbolinae (Trilobita) from the Holy Cross Mountains, Poland. Acta Palaeontologica Polonica, 7:53–222.Google Scholar
Owens, R. M. and Tilsley, J. W. 1995. An atheloptic trilobite assemblage from the Carboniferous of North Devon. Geological Magazine, 132:713–728.CrossRefGoogle Scholar
Pack, P. D. and Gayle, H. B. 1971. A new olenellid trilobite, Biceratops nevadensis, from the Lower Cambrian near Las Vegas, Nevada. Journal of Paleontology, 45:893–898.Google Scholar
Palmer, A. R. 1998. Terminal Early Cambrian extinction of the Olenellina: Documentation from the Pioche Formation, Nevada. Journal of Paleontology, 72:650–672.CrossRefGoogle Scholar
Palmer, A. R. and Halley, R. B. 1979. Physical stratigraphy and trilobite biostratigraphy of the Carrara Formation (Lower and Middle Cambrian) in the southern Great Basin. U.S. Geological Survey Professional Paper, 1047: 1–131.Google Scholar
Palmer, A. R. and Repina, L. N. 1993. Through a glass darkly: Taxonomy, phylogeny, and biostratigraphy of the Olenellina. University of Kansas Paleontological Contributions, New Series, 3:1–35.Google Scholar
Palmer, A. R. and Repina, L. N. 1997. Suborder Olenellina, p. 405–429. In Kaesler, R. L. (ed.), Treatise on Invertebrate Paleontology, Pt. O, Arthropoda 1, Trilobita, Revised, Volume 1. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Poulsen, C. 1932. The Lower Cambrian faunas of East Greenland. Meddelelser om Gr⊘nland, 87:1–66.Google Scholar
Poulsen, C. 1959. Suborder Olenellina, p. 0190–0198. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Pt. O, Arthropoda 1. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Raw, F. 1925. The development of Leptoplastus salteri (Callaway), and of other trilobites (Olenidae, Ptychoparidae, Conocoryphidae, Paradoxidae, Phacopidae, and Mesonacidae). Quarterly Journal of the Geological Society of London, 81:223–324.CrossRefGoogle Scholar
Richter, R. 1932. Crustacea (Paläontologie), p. 840–846. In Dittler, R., Joos, G., Korschelt, E., Linek, G., Oltmanns, F., and Schaum, K. (eds.), Handwörterbuch der Naturwissenschaften, 2nd Ed. Gustav Fisher, Jena.Google Scholar
Richter, R. and Richter, E. 1939. Proetidae von oberdevonischer Tracht in deutschen, englischen und mittelmeerischen Unter-Karbon. Unterlagen zum Fossilium Catalogus, Trilobitae. 8. Senckenbergiana, 21:82–112.Google Scholar
Robison, R. A. and Pantoja-Alor, J. 1968. Tremadocian trilobites from the Nochixtlán region, Oaxaca, Mexico. Journal of Paleontology, 42:767–800.Google Scholar
Shergold, J. H. 1977. Classification of the trilobite Pseudagnostus . Palaeontology, 20:69–100.Google Scholar
Shimer, H. W. and Shrock, R. R. 1944. Index fossils of North America. Technology Press, Massachusetts Institute of Technology. John Wiley and Sons, New York, 837 p.Google Scholar
Smith, L. H. and Lieberman, B. S. 1999. Disparity and constraint in olenelloid trilobites and the Cambrian Radiation. Paleobiology, 25:459–470.CrossRefGoogle Scholar
Stewart, J. H. 1970. Upper Precambrian and Lower Cambrian strata in the southern Great Basin, California and Nevada. U.S. Geological Survey Professional Paper, 620: 206 p.Google Scholar
Stitt, J. H. and Clark, R. L. 1984. A complete specimen of Peachella brevispina Palmer - an unusual olenellid trilobite (Arthropoda: Olenellida) from the lower Cambrian of California. Transactions of the San Diego Society of Natural History, 20:145–150.CrossRefGoogle Scholar
Sundberg, F. A. 2000. Homeotic evolution in Cambrian trilobites. Paleobiology, 26:258–270.2.0.CO;2>CrossRefGoogle Scholar
Vogdes, A. W. 1893. A classed and annotated bibliography of the Palaeozoic Crustacea 1698–1892 to which is added a catalogue of North American species. Occasional Papers of the California Academy of Sciences, 4.Google Scholar
Walcott, C. D. 1884. Paleontology of the Eureka District. U.S. Geological Survey Monographs, 8:1–298.Google Scholar
Walcott, C. D. 1886. Second contribution to the studies on the Cambrian faunas of North America. U.S. Geological Survey Bulletin, 30:369 pp.Google Scholar
Walcott, C. D. 1890. The fauna of the Lower Cambrian or Olenellus Zone, p. 509–774. In Tenth Annual Report of the Director, 1888–1889, U.S. Geological Survey.Google Scholar
Walcott, C. D. 1910. Cambrian Geology and Paleontology, Number 6: Olenellus and other genera of the Mesonacidae. Smithsonian Miscellaneous Collections, 53:231–422.Google Scholar
Walcott, C. D. 1912. Cambrian Brachiopoda. U.S. Geological Survey Monograph.Google Scholar
Webster, M. 2003. Olenelloid trilobites of the southern Great Basin, U.S.A., and a refinement of uppermost Dyeran biostratigraphy. Geological Society of America, Abstracts with Programs, 35(6): 166.Google Scholar
Webster, M. 2007a. A Cambrian peak in morphological variation within trilobite species. Science, 317:499–502.CrossRefGoogle Scholar
Webster, M. 2007b. Ontogeny and evolution of the Early Cambrian trilobite genus Nephrolenellus (Olenelloidea). Journal of Paleontology, 81:1168–1193.CrossRefGoogle Scholar
Webster, M. 2007c. Paranephrolenellus, a new genus of Early Cambrian olenelloid trilobite. Memoirs of the Association of Australasian Palaeontologists, 34:31–59.Google Scholar
Webster, M. and Zelditch, M. L. 2005. Evolutionary modifications of ontogeny: Heterochrony and beyond. Paleobiology, 31:354–372.CrossRefGoogle Scholar
Webster, M., Sheets, H. D., and Hughes, N. C. 2001. Allometric patterning in trilobite ontogeny: testing for heterochrony in Nephrolenellus. p. 105–144. In Zelditch, M. L. (ed.), Beyond Heterochrony: The Evolution of Development. Wiley and Sons, New York.Google Scholar
Webster, M., Sadler, P. M., Kooser, M. A., and Fowler, E. 2003. Combining stratigraphic sections and museum collections to increase biostratigraphic resolution, p. 95–128. In Harries, P. J. (ed.), High-Resolution Approaches in Stratigraphic Paleontology. Topics In Geobiology, Vol. 21. Kluwer Academic Publishers, Dordrecht.CrossRefGoogle Scholar
Westgate, L. G. and Knopf, A. 1932. Geology and ore deposits of the Pioche District, Nevada. U.S. Geological Survey Professional Paper, 171: 1–79.Google Scholar
Wheeler, H. E. 1943. Lower and Middle Cambrian stratigraphy in the Great Basin. Bulletin of the Geological Society of America, 54:1781–1822.CrossRefGoogle Scholar
Wheeler, H. E. 1948. Late pre-Cambrian - Cambrian stratigraphic cross section through southern Nevada. University of Nevada Bulletin, 42(3):1–58.Google Scholar
Whittington, H. B. 1989. Olenelloid trilobites: Type species, functional morphology and higher classification. Philosophical Transactions of the Royal Society of London, Series B, 324:111–147.Google Scholar
Whittington, H. B., and Kelly, S. R. A. 1997. Morphological terms applied to Trilobita. p. 313–329. In Kaesler, R. L. (ed.), Treatise on Invertebrate Paleontology, Pt. O, Arthropoda 1. Trilobita, Revised, Volume 1. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar