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Silurian Encrinurinae (Trilobita) from the central United States

Published online by Cambridge University Press:  20 May 2016

Kenneth C. Gass ,
Gregory D. Edgecombe ,
Lars Ramsköld ,
Donald G. Mikulic  and
Rodney Watkins
Kenneth C. Gass
Affiliation:
921 11th Street South, Wisconsin Rapids, Wisconsin 54494
Gregory D. Edgecombe
Affiliation:
Department of Invertebrates, American Museum of Natural History, Central Park West at 79th Street, New York, New York 10024
Lars Ramsköld
Affiliation:
Department of Palaeozoology, Swedish Museum of Natural History, Box 50007, S-104 05, Stockholm
Donald G. Mikulic
Affiliation:
Illinois State Geological Survey, Natural Resources Building, 615 East Peabody Drive, Champaign 61820
Rodney Watkins
Affiliation:
Department of Geology, Milwaukee Public Museum, 800 W. Wells Street, Milwaukee, Wisconsin 53233
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Abstract

Silurian (Llandovery–Ludlow) Encrinurinae from Wisconsin, Indiana, and Illinois include species of Balizoma Holloway, 1980, Curriella Lamont, 1978, Distyrax Lane, 1988, Encrinurus Emmrich, 1844, Mackenziurus Edgecombe and Chatterton, 1990a, and Nucleurus Ramsköld, 1986. Mackenziurus lauriae n. sp. is described from Wenlock strata of the Racine and Sugar Run Dolomites; nine segments in the holaspid thorax are the fewest known for any encrinurid. A square rostral plate is diagnostic of Mackenziurus. New morphological data are provided by Illinois specimens of Balizoma indianensis (Kindle and Breger, 1904) from the Wenlock–Ludlow Racine Dolomite, and of Curriella tuberculifrons (Weller, 1907) from the Llandovery Elwood–Wilhelmi Formations. Nucleurus n. sp. is possibly from Llandovery strata in Wisconsin. Distyrax n. sp. occurs in the Brandon Bridge Member (late Llandovery–early Wenlock) of the Joliet Dolomite in Illinois. The type pygidia and possible topotype material of Encrinurus nereus Hall, 1867, confirm assignment to that genus as currently viewed; this reefal species is distinct from the closely related inter-reef species E. egani Miller, 1880, and appears to be distinct from reefal E. reflexus Raymond, 1916. Lectotypes are selected for these Encrinurus species.

Type
Research Article
Information
Journal of Paleontology , Volume 66 , Issue 1 , January 1992 , pp. 75 - 89
Copyright
Copyright © The Paleontological Society 

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References

Angelin, N. P. 1851. Palaontologia Svecica. I: Iconographia crustaceorum formationis transitionis. Fascicule, 1:1–24.Google Scholar
Angelin, N. P. 1854. Paleontologia Scandinavica. I: Crustacea formationis transitionis. Fascicule, 2:21–92.Google Scholar
Barrande, J. 1852. Systême Silurien du centre de la Bohême. Iere partie. Recherches paléontologiques, I. Crustacés, Trilobites. Prague, Paris, 935 p.Google Scholar
Bassler, R. S. 1915. Bibliographic Index of North American Ordovician and Silurian Fossils. Vol. 1. U.S. National Museum, Bulletin 92, 718 p.Google Scholar
Best, R. V. 1961. Intraspecific variation in Encrinurus ornatus. Journal of Paleontology, 35:1029–1040.Google Scholar
Boucot, A. J. 1975. Evolution and Extinction Rate Controls. Elsevier, Amsterdam, 427 p.Google Scholar
Brongniart, A. 1822. Histoire naturelle des Crustacés fossiles, sous les rapports zoologiques et géologiques, savoir les trilobites par Alexandre Brongniart. Les Crustacés proprement par A.-G. Desmarest, Paris, 154 p.Google Scholar
Campbell, K. S. W. 1967. Trilobites of the Henryhouse Formation (Silurian) in Oklahoma. Oklahoma Geological Survey Bulletin, 115:1–68.Google Scholar
Droste, J. B., and Shaver, R. H. 1982. The Salina Group (Middle and Upper Silurian) of Indiana. Indiana Department of Natural Resources. Geological Survey Special Report 24, 41 p.Google Scholar
Edgecombe, G. D. 1990. Encrinurine trilobites from the Silurian Brownsport Formation of Tennessee. Journal of Paleontology, 64:961–967.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1990a. Mackenziurus, a new genus of the Silurian “Encrinurus” variolaris plexus (Trilobita). American Museum Novitates, 2968, 22 p.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1990b. Systematics of Encrinuroides and Curriella (Trilobita), with a new Early Silurian encrinurine from the Mackenzie Mountains. Canadian Journal of Earth Sciences, 27:820–833.Google Scholar
Edgecombe, G. D., and Chatterton, B. D. E. 1992. Early Silurian (Llandovery) encrinurine trilobites from the Mackenzie Mountains, Canada. Journal of Paleontology, 66:52–74.Google Scholar
Edgecombe, G. D., Speyer, S. E., and Chatterton, B. D. E. 1988. Protaspid larvae and phylogenetics of encrinurid trilobites. Journal of Paleontology, 62:779–799.Google Scholar
Emielity, J. G. 1963. Silurian trilobites of southeastern Wisconsin. Milwaukee Public Museum Publications in Geology, 1, 36 p.Google Scholar
Emielity, J. G., and Bradbury, D. P. 1986. List of Silurian trilobites of the United States, Canada, and Greenland. Southern California Paleontological Society, Special Publication 5, 39 p.Google Scholar
Emmrich, H. F. 1844. Zur Naturgeschichte der Trilobiten. Meinengen, 28 p.Google Scholar
Foerste, A. F. 1887. The Clinton Group of Ohio. Part II. Bulletin of the Scientific Laboratories of Denison University, 22:89–110.Google Scholar
Foerste, A. F. 1919. Notes on Isotelus, Calymene, and Encrinurus. Bulletin of the Scientific Laboratories of Denison University, 19:65–81.Google Scholar
Hall, J. 1852. Paleontology of New York. Vol. 2. C. van Benthuysen, Albany, 362 p.Google Scholar
Hall, J. 1867. (reprinted and repaginated 1870). Account of some new or little known species of fossils from rocks of the age of the Niagara Group. Report of the New York State Cabinet of Natural History, 20:305–401.Google Scholar
Hall, J., and Whitfield, R. P. 1875. Descriptions of invertebrate fossils, mainly from the Silurian System. Report of the Geological Survey of Ohio. Vol. 2. Geology and Palaeontology. Pt. 2. Paleontology, p. 65–161.Google Scholar
Holloway, D. J. 1980. Middle Silurian trilobites from Arkansas and Oklahoma, U.S.A. Palaeontographica A, 170:1–85.Google Scholar
Howells, Y. 1982. Scottish Silurian trilobites. Palaeontographical Society Monograph 135:1–76.Google Scholar
International Commission on Zoological Nomenclature. 1985. International Code of Zoological Nomenclature. Third Edition. International Trust for Zoological Nomenclature, London, 338 p.Google Scholar
Kindle, E. M., and Breger, C. L. 1904. Paleontology, p. 428–486. In Kindle, E., The Stratigraphy and Paleontology of the Niagara of Northern Indiana. Indiana Department of Geology and Natural Resources, Annual Report (for 1903), 28.Google Scholar
Lamont, A. 1978. Pentlandian miscellany: Mollusca, Trilobita, etc. Scottish Journal of Science, 1:245–302.Google Scholar
Lane, P. D. 1988. Silurian trilobites from Peary Land, central North Greenland. Gr⊘nlands Geologiske Unders⊘gelse, Rapport 137:93–117.Google Scholar
Levi-Setti, R. 1975. Trilobites. A Photographic Atlas. University of Chicago Press, 213 p.Google Scholar
Lowenstam, H. A. 1942. A Niagaran fauna from the Chicago area with Bainbridge and Brownsport affinities. Bulletin of the Buffalo Society of Natural History, 17:36–39.Google Scholar
Lowenstam, H. A. 1948. Biostratigraphic studies of the Niagaran inter-reef formations in northeastern Illinois. Illinois State Museum, Scientific Papers, 4, 146 p.Google Scholar
Ludvigsen, R. 1979. Fossils of Ontario. Pt. 1: The Trilobites. Royal Ontario Museum, Life Sciences Miscellaneous Publications, 96 p.Google Scholar
Ludvigsen, R., and Tripp, R. P. 1990. Silurian trilobites from Northern Yukon Territory. Royal Ontario Museum, Life Sciences Contributions, 153, 59 p.Google Scholar
Mánnil, R. M. 1958. Trilobity semeystv Cheiruridae i Encrinuridae iz Estonii. Trudy Instituta geologii, Akademiya nauk Estonskoi SSR, 3:165–212.Google Scholar
Mánnil, R. 1977. Novye enkrinuridy (Trilobita) Llandoveri Pribaltiki. Eesti NSV teaduste akadeemia toimetised, Keemia, Geoloogia, 26:46–56.Google Scholar
Mikulic, D. G. 1976. Distribution and community succession of Silurian trilobites (Thornton reef, Illinois), p. 1–22. In Pray, L. C. (ed.), The Thornton Reef (Silurian), Northeastern Illinois, 1976 Revisitation. Illinois portion of a guidebook for a field trip on Silurian reefs, interreef facies, and faunal zones of northern Indiana and northeastern Illinois. North-Central Section, Geological Society of America.Google Scholar
Mikulic, D. G. 1979. The paleoecology of Silurian trilobites with a section on the Silurian stratigraphy of southeastern Wisconsin. Unpubl. Ph.D. dissertation, Oregon State University, Corvallis, 864 p.Google Scholar
Miller, S. A. 1877. The American Paleozoic Fossils. Published by the author, Cincinnati, 253 p.Google Scholar
Miller, S. A. 1880. Description of two new species from the Niagara Group and five from the Keokuk Group. Journal of the Cincinnati Society of Natural History, 2:254–259.Google Scholar
Miller, S. A. 1889. North American Geology and Paleontology for the use of Amateurs, Students and Scientists. Western Methodist Book Concern, Cincinnati, 793 p.Google Scholar
Morris, S. F. 1988. A review of British trilobites, including a synoptic review of Salter's monograph. Palaeontographical Society Monograph, 140, 316 p.Google Scholar
Munthe, J. 1980. Catalog of fossil type and figured specimens in the Milwaukee Public Museum. Milwaukee Public Museum Contributions in Biology and Geology, 39, 27 p.Google Scholar
Nixon, K. C., and Wheeler, Q. D. 1990. An amplification of the phylogenetic species concept. Cladistics, 6:211–223.Google Scholar
Norton, W. H. 1895. Variation in the position of the nodes on the axial segments of pygidium of a species of Encrinurus. Iowa Academy of Science, 3:79–81.Google Scholar
Orton, E. F. B. 1873. Geology of Clarke County, p. 450–480. In Report of the Geological Survey of Ohio. Vol. I. Geology and Paleontology. Pt. I. Geology. Nevins and Myers, Columbus.Google Scholar
Ramsköld, L. 1986. Silurian encrinurid trilobites from Gotland and Dalarna, Sweden. Palaeontology, 29:527–575.Google Scholar
Raymond, P. E. 1916. New and old Silurian trilobites from southeastern Wisconsin, with notes on the genera of the Illaenidae. Bulletin of the Museum of Comparative Zoology at Harvard College, 60:1–41.Google Scholar
Reed, F. R. C. 1931. The lower Paleozoic trilobites of Girvan, Ayrshire. Supplement no. 2. Palaeontographical Society Monograph, 83, 30 p.Google Scholar
Rosenstein, E. 1941. Die Encrinurus-Arten des Estlandischen Silurs. Annales Societatis rebus naturae investigandis in Universitate tartuensis constitutae, 47:49–77.Google Scholar
Šnajdr, M. 1985. Bohemian representatives of the subfamily Encrinurinae (Trilobita). Sbornik Geologickych Věd, Paleontologie, 27:9–46.Google Scholar
Strusz, D. L. 1980. The Encrinuridae and related trilobite families, with a description of Silurian species from southeastern Australia. Paleontographica A, 168:1–68.Google Scholar
Temple, J. T. 1954. The hypostome of Encrinurus variolaris and its relation to the cephalon. Geological Magazine, 91:315–318.Google Scholar
Thompson, I. 1982. The Audubon Society Field Guide to North American Fossils. Alfred A. Knopf, New York, 846 p.Google Scholar
Tripp, R. P., Temple, J. T., and Gass, K. C. 1977. The Silurian trilobite Encrinurus variolaris and allied species with notes on Frammia. Palaeontology, 20:847–867.Google Scholar
Twenhofel, W. H. 1928. Geology of Anticosti Island. Geological Survey of Canada, Memoir 154, 481 p.Google Scholar
Vogdes, A. W. 1878. Monograph on the genera Zethus, Cybele, Encrinurus, and Cryptonymus. Published by the author, Charleston, 35 p.Google Scholar
Vogdes, A. W. 1893. A classed and annotated bibliography of the Paleozoic Crustacea 1698–1892 to which is added a catalogue of North American species. Occasional Papers of the California Academy of Sciences, 4, 412 p.Google Scholar
Vogdes, A. W. 1907. The genus Encrinurus. Its history, its species, its proper division in the family of trilobites. Transactions of the San Diego Society of Natural History, 1:61–83.Google Scholar
Wahlenberg, G. 1818. Petrificata Telluris Svecanae. Nova Acta Regiae Societatis Scientiatum Upsaliensis, 8:1–116.Google Scholar
Walter, O. T. 1924. Trilobites of Iowa and some related Paleozoic forms. Iowa Geological Survey, Annual Reports 1923 and 1924, 31:167–389.Google Scholar
Watkins, R., and Boucot, A. J. 1978. Temporal pattern of species diversity among some Silurodevonian brachiopods. Evolutionary Biology, 11:636–647.Google Scholar
Weller, S. 1907. The paleontology of the Niagaran Limestone in the Chicago area. The Trilobita. Bulletin of the Chicago Academy of Science, 4:163–281.Google Scholar
Whittington, H. B., and Campbell, K. S. W. 1967. Silicified Silurian trilobites from Maine. Bulletin of the Museum of Comparative Zoology at Harvard College, 135:447–483.Google Scholar