Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-20T05:41:12.915Z Has data issue: false hasContentIssue false
  • English
  • Français

New Lower Cambrian olenelloid trilobite genera Cirquella and Geraldinella from southwestern Canada

Published online by Cambridge University Press:  20 May 2016

W. H. Fritz
W. H. Fritz*
Affiliation:
Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada
Get access Rights & Permissions [Opens in a new window]

Abstract

The genus Cirquella is erected for small, smooth nevadiid trilobites that lack genal spines. The type species, C. nummularia, is associated with taxa in the Dogtooth Mountains, British Columbia, that belong to the Nevadella Zone. A second species, C. espinata, is described from the southern Canadian Rocky Mountains, where it is associated with the new archaeaspid genus Geraldinella. Strata in the latter locality can be physically correlated to documented strata of the Nevadella Zone. The same zone in Nevada contains C. nummularia?.

Type
Research Article
Information
Journal of Paleontology , Volume 67 , Issue 5 , September 1993 , pp. 856 - 868
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

Corneil, B. D. 1967. The Geraldine Lakes section, Jasper Park, Alberta. Unpubl. , , Kingston, Ontario, 98 p.Google Scholar
Evans, C. S. 1933. Brisco–Dogtooth map-area, British Columbia. Geological Survey of Canada, Summary Report, 1932, Part A II:106–176.Google Scholar
Fritz, W. H. 1972. Lower Cambrian trilobites from the Sekwi Formation type section, Mackenzie Mountains, northwestern Canada. Geological Survey of Canada, Bulletin 212, 90 p.Google Scholar
Fritz, W. H. 1973. Medial Lower Cambrian trilobites from the Mackenzie Mountains, northwestern Canada. Geological Survey of Canada, Paper 73–24, 43 p.Google Scholar
Fritz, W. H. 1992. Walcott's Lower Cambrian olenellid trilobite collection 61k, Mount Robson area, Rocky Mountains, Canada. Geological Survey of Canada, Bulletin 432, 64 p.Google Scholar
Harrington, H. J., Moore, R. C., and Stubblefield, C. J. 1959. Morphological terms applied to Trilobita, p. 017–0126. 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
Hunt, D. L. 1990. Trilobite faunas and biostratigraphy of the Lower Cambrian Wood Canyon Formation, Death Valley region, California. Unpubl. , , Davis, 140 p.Google Scholar
Hupé, P. 1953. Classification des trilobites. Annales de Paleontologie, 39:61–168.Google Scholar
Kubli, T. E. 1990. Geology of the Dogtooth Range, northern Purcell Mountains, British Columbia. Unpubl. , , 324 p.Google Scholar
Mount, J. F., Hunt, D. L., Greene, L. R., and Dienger, J. 1991. Depositional systems, biostratigraphy and sequence stratigraphy of Lower Cambrian grand cycles, southwestern Great Basin, p. 209–227. In Cooper, J. D. and Stevens, C. H. (eds.), Paleozoic Paleogeography of the Western United States—II, Volume 1, Pacific Section, Society of Economic Paleontologists and Mineralogists, Los Angeles.Google Scholar
Nelson, C. A., and Durham, J. W. 1966. Guidebook for field trip to Precambrian–Cambrian succession, White-Inyo Mountains, California. Geological Society of America, Guidebook for 79th Annual Meeting, 17 p.Google Scholar
Palmer, A. R. 1960. Some aspects of the early Upper Cambrian stratigraphy of White Pine County, Nevada and vicinity, p. 53–58. In Boettcher, J. W. and Sloan, W. W. Jr. (eds.), Guidebook to the Geology of East Central Nevada. Intermountain Association of Petroleum Geologists and Eastern Nevada Geological Society, 11th Annual Field Conference.Google Scholar
Repina, L. N. In Komentovskii, V. V. and Repina, L. N., 1965. Nizhniy Kembriy Stratotipicheskovo Razreza Sibiri [Lower Cambrian Statotype Section of Siberia]. Akademiya Nauk SSSR Sibirskoe otdelenie, Instituta Geologii i Geofiziki, 199 p.Google Scholar
Repina, L. N. 1979. Dependence of morphological features upon the living conditions of trilobites and an evaluation of their importance in the classification of the superfamily Olenelloidea. Trudy Instituta Geologii i Geofiziki AN SSSR, Sibirskoe otdelenie, 431:11–30.Google Scholar
Robison, R. A. 1960. Lower and Middle Cambrian stratigraphy of the eastern Great Basin, p. 43–52. In Boettcher, J. W. and Sloan, W. W. Jr. (eds.), Guidebook to the Geology of East Central Nevada. Intermountain Association of Petroleum Geologists and Eastern Nevada Geological Society, 11th Annual Field Conference.Google Scholar
Walcott, C. D. 1910. Olenellus and other genera of the Mesonacidae. Smithsonian Miscellaneous Collections, 53:231–422.Google Scholar
Walcott, C. D. 1913. New Lower Cambrian subfauna. Smithsonian Miscellaneous Collections, 57:309–326.Google Scholar
Wind, G., and Simony, P. S. 1970. Structure of the Dogtooth Range and adjacent portions of the Rocky Mountain Trench. Geological Association of Canada, Special Paper, 6:41–51.Google Scholar