Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-12-01T09:14:03.733Z Has data issue: false hasContentIssue false
  • English
  • Français

Ptychopleurites spinosa, a new trilobite species from the Upper Cambrian of Texas and South Dakota

Published online by Cambridge University Press:  14 July 2015

James H. Stitt  and
Wendy L. Metcalf
James H. Stitt
Affiliation:
Department of Geological Sciences, University of Missouri–Columbia, Columbia 65211
Wendy L. Metcalf
Affiliation:
Department of Geological Sciences, University of Missouri–Columbia, Columbia 65211
Get access Rights & Permissions [Opens in a new window]

Extract

During preparation of a manuscript on new collections of Upper Cambrian trilobites from the Threadgill Creek section in central Texas (Longacre, 1970, text-fig. 6), a new trilobite species Ptychopleurites spinosa was discovered that can be used to recognize a revised base to the Saukia Zone (Trempealeauan Stage) in central Texas. This species is represented in central Texas by numerous, well-preserved cranidia and librigenae, but no pygidia have been recovered. Recently Ptychopleurites spinosa was also identified in a collection of trilobites of the partly correlative Illaenurus Zone (= lower part of Saukia Zone) from the type section of the Deadwood Formation in the Black Hills of South Dakota. This work is part of a paper that will describe the latest Franconian and Trempealeauan trilobites from the Deadwood Formation, using collections made by Dr. Christina Lochman-Balk. Ptychopleurites spinosa is represented in the Black Hills by incompletely preserved cranidia and well-preserved librigenae. Because it is not known which of these two papers will be published first, it was decided to establish Ptychopleurites spinosa as a new species with one of the better Texas cranidia as the holotype and the Black Hills material as part of the suite of paratypes.

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 69 , Issue 6 , November 1995 , pp. 1183 - 1185
Copyright
Copyright © The Paleontological Society 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Barnes, V. E., and Bell, W. C. 1977. The Moore Hollow Group of central Texas. Bureau of Economic Geology, University of Texas, Report of Investigations 88, 169 p.Google Scholar
Bradley, J. H. Jr. 1925. Trilobites of the Beekmantown in the Phillipsburg region of Quebec. Canadian Field Naturalist, 39:5–9.CrossRefGoogle Scholar
Harrington, H. J. 1959. General description of Trilobita, p. O38–O126. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Part O, Arthropoda 1. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Henningsmoen, G. 1957. The trilobite family Olenidae. With description of Norwegian material and remarks on the Olenid and Tremadocian Series. Skrifter Utgitt au Det Norske Videnskaps-akademi 1 Oslo, 303 p.Google Scholar
Kobayashi, T. 1935. The Cambro–Ordovician formations and faunas of South Chosen; Paleontology; Part III, Cambrian faunas of South Chosen with a special study on the Cambrian trilobite genera and families. Journal of the Faculty of Science, Imperial University of Tokyo, section 2, 4:49–344.Google Scholar
Kobayashi, T. 1936a. Notes on nomenclature of some Cambro–Ordovician genera. Journal of the Geological Society of Japan, 43:922.Google Scholar
Kobayashi, T. 1936b. Cambrian and Lower Ordovician trilobites from northwestern Canada. Journal of Paleontology, 10:157–167.Google Scholar
Lochman-Balk, C. 1956. The Cambrian of the Rocky Mountains and southwest deserts of the United States and adjoining Sonora Province, Mexico, p. 529–661. In Rodgers, J. (ed.), Part 2: Australia, America, El sistema Cambrico, su paleogeografia y el problema de su base. 20th International Geological Congress, Mexico City.Google Scholar
Longacre, S. A. 1970. Trilobites of the Upper Cambrian Ptychaspid Biomere, Wilberns Formation, central Texas. Paleontological Society Memoir 4 (Journal of Paleontology 44[1] Supplement), 70 p.Google Scholar
Ludvigsen, R. 1982. Upper Cambrian and Lower Ordovician trilobite biostratigraphy of the Rabbitkettle Formation, western District of Mackenzie. Life Sciences Contributions, Royal Ontario Museum, 134, 187 p.Google Scholar
Ludvigsen, R., Westrop, S. R., and Kindle, C. H. 1989. Sunwaptan (Upper Cambrian) Trilobites of the Cow Head Group, Western Newfoundland, Canada. Palaeontographica Canadiana, 6, 175 p.Google Scholar
Rasetti, F. 1944. Upper Cambrian trilobites from the Levis conglomerate. Journal of Paleontology, 18:229–258.Google Scholar
Rasetti, F. 1945. New Upper Cambrian trilobites from the Levis conglomerate. Journal of Paleontology, 19:462–478.Google Scholar
Rasetti, F. 1959. Trempealeauian trilobites from the Conococheague, Frederick and Grove limestones of the central Appalachians. Journal of Paleontology, 33:375–398.Google Scholar
Rasetti, F. 1963. Additions to the Upper Cambrian fauna from the conglomerate boulders at Levis, Quebec. Journal of Paleontology, 37:1009–1017.Google Scholar
Raymond, P. E. 1937. Upper Cambrian and Lower Ordovician Trilobita and Ostracoda from Vermont. Geological Society of America Bulletin, 48:1079–1145.CrossRefGoogle Scholar
Stitt, J. H. 1977. Late Cambrian and earliest Ordovician trilobites, Wichita Mountains area, Oklahoma. Oklahoma Geological Survey, Bulletin 124, 79 p.Google Scholar
Swinnerton, H. H. 1915. Suggestions for a revised classification of trilobites. Geological Magazine, new series, 2:407–496, 538-545.Google Scholar
Westrop, S. R. 1986. Trilobites of the Upper Cambrian Sunwaptan Stage, southern Canadian Rocky Mountains, Alberta. Palaeontographica Canadiana, 3, 179 p.Google Scholar