Hostname: page-component-848d4c4894-ndmmz Total loading time: 0 Render date: 2024-06-02T17:36:59.263Z Has data issue: false hasContentIssue false
  • English
  • Français

Inconobotopora lichenoporoides, a new genus and species of cystoporate bryozoan from the Silurian of Gotland, and its evolutionary implications

Published online by Cambridge University Press:  20 May 2016

Su Tang  and
Roger J. Cuffey
Su Tang
Affiliation:
Department of Geosciences (412 Deike Bldg.), Pennsylvania State University, University Park, 16802
Roger J. Cuffey
Affiliation:
Department of Geosciences (412 Deike Bldg.), Pennsylvania State University, University Park, 16802
Get access Rights & Permissions [Opens in a new window]

Abstract

An unusual, lichenoporid-like bryozoan colony from Mid-Silurian strata on Gotland is described as a new cystoporate, Inconobotopora lichenoporoides new genus and species; a poorly known form from the same area and approximate horizon is reclassified as Inconobotopora silurica (Hennig, 1906). Similarities in overall morphology, particularly flagged by the distinctive radial-disk construction, combine with geochronologic sequence to suggest the possibility of an evolutionary lineage from Ordovician Constellaria, through Silurian Inconobotopora, to Devonian Botryllopora, and perhaps even on to Cretaceous-Cenozoic-Recent Lichenopora (although this last extension is extremely difficult to demonstrate in the present state of knowledge).

Type
Research Article
Information
Journal of Paleontology , Volume 72 , Issue 2 , March 1998 , pp. 256 - 264
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

Anstey, R. L. 1990. Bryozoans, p. 232–252. In McNamara, K. J. (ed.), Evolutionary Trends. University of Arizona Press, Tucson, 368 p. Google Scholar
Astrova, G. G. 1964. O novom otryade paleozojskikh mshanok. Paleontologicheskiy Zhurnal, 1964(2):22–31.Google Scholar
Bassler, R. S. 1953. Bryozoa, p. 1–253. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Part G (Bryozoa). Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Blake, D. B., and Snyder, E. M. 1987. Phenetic and cladistic analyses of the Rhabdomesina (Bryozoa) and similar taxa: a preliminary study, p. 33–40. In Ross, J. R. P. (ed.), Bryozoa: Present and Past. Western Washington University, Bellingham.Google Scholar
Boardman, R. S. 1983. General features of the class Stenolaemata, p. 49–137. In Robison, R. A. (ed.), Treatise on Invertebrate Paleontology, Part G (Bryozoa), Revised, volume 1. Geological Society of America and University of Kansas Press, Boulder and Lawrence.Google Scholar
Boardman, R. S., and McKinney, F. K. 1976. Skeletal architecture and preserved organs of four-sided zooids in convergent genera of Paleozoic Trepostomata (Bryozoa). Journal of Paleontology, 50:25–78.Google Scholar
Cuffey, R. J. 1972. Paleontologic evidence and organic evolution. Journal of the American Scientific Affiliation, 24:160–161, 166-174, 177. Reprinted 1984, p. 255-281. In Montagu, A. (ed.), Science and Creationism. Oxford University Press, Oxford.Google Scholar
Cuffey, R. J. 1973. An improved classification, based upon numerical-taxonomic analyses, for the higher taxa of entoproct and ectoproct bryozoans, p. 549–564. In Larwood, G. P. (ed.), Living and Fossil Bryozoa. Academic Press, London.Google Scholar
Cuffey, R. J., and Blake, D. B. 1991. Cladistic analysis of the phylum Bryozoa, p. 97–108. In Bigey, F. P. and d'Hondt, J.-L. (eds.), Bryozoaires Actuels et Fossiles: Bryozoa Living and Fossil. Société des Sciences Naturelles de l'Ouest de la France, Nantes.Google Scholar
Hennig, A. 1906. Gotlands Silur-Bryozoer, 2. Arkiv for Zoologi, 3(10):1–62.Google Scholar
Laufeld, S. 1974. Reference localities for palaeontology and geology in the Silurian of Gotland. Sveriges Geologiska Undersoekning Aarsbok, 68(12:C-705):1–172.Google Scholar
Laufeld, S., and Bassett, M. G. 1981. Gotland: the anatomy of a Silurian carbonate platform. Episodes: Newsmagazine of the International Union of Geological Sciences, 1981(2):5 p. [pages not numbered].Google Scholar
Manten, A. A. 1971. Silurian reefs of Gotland. Elsevier, Amsterdam, 258 p.Google Scholar
Nield, E. W. 1981. The inception and development of reef growth in the Visby Formation (Sheinwoodian/late Llandovery) of Gotland, Sweden. Unpubl. , University of Wales, University College Cardiff, 285 p.Google Scholar
Soroka, L. G. 1977. Modern Bermuda lichenoporids—their skeletal morphology, variability, and reefal ecology. Unpubl. , Pennsylvania State University, University Park, 206 p.Google Scholar
Tang, S. 1988. Paleozoic lichenoporid-like bryozoans. Unpubl. , Pennsylvania State University, University Park, 152 p.Google Scholar
Tang, S., and Cuffey, R. J. 1990. Evolutionary implications of a Silurian Lichenopora-like intermediate between Ordovician Constellaria and Devonian Botryllopora (Bryozoa). Geological Society of America Abstracts with Programs, 22(2):73.Google Scholar
Ulrich, E. O. 1890. Palaeozoic Bryozoa. Illinois Geological Survey, Geology and Palaeontology, 8:283–678.Google Scholar
Utgaard, J. 1983. Paleobiology and taxonomy of the order Cystoporata, p. 327–439. In Robison, R. A. (ed.), Treatise on Invertebrate Paleontology, Part G (Bryozoa), Revised, vol. 1. Geological Society of America and University of Kansas Press, Boulder and Lawrence.Google Scholar
Watts, N. R. 1988. Carbonate particulate sedimentation and facies within the Lower Silurian Högklint patch reefs of Gotland, Sweden. Sedimentary Geology, 59:93–113.Google Scholar