Ordovician chitinous hydroids from Hudson Strait, District of Franklin, Northwest Territories

Auteurs-es

  • Merrell A. Miller Amoco Production Company, P.O. Box 3385, Tulsa, Oklahoma 74102, U.SA.
  • Graham L. Willams Atlantic Geoscience Centre, Geological Survey of Canada, Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth, Nova Scotia B2Y4A2, Canada

DOI :

https://doi.org/10.4138/1725

Résumé

Chitinous hydroids are documented for the first time from the Upper Ordovician of Eastern Canada, and for the fourth time from North American rocks. One hydrosome branch segment is provisionally attributed to Rhabdohydra Kozlowski. The excellent three dimensional preservation shows the periderm is layered and vesiculate. Periderm thinning, present in Recent chitinous hydroids, is also noted for Ordovician hydroids. RÉSUMÉ Une premiére signalisation, d'hydro ides chitineuses dans l’Ordovicien sup iérieur de l'Est du Canada vient s'ajouter aux trois documents deja issus de roches nord-ameiicaines. Un segment de rameau hydrosomal est rapporte' avec r iéserve au genre Rhabdohydra Kozlowski. line excellente conservation dans ses trois dimensions d iémontre que le p iériderme est vésiculeux et constitu ié de plusieurs couches. L'amincissement du p iériderme, ph iénom iène connu des hydroides chitineuses actuelles, se manifeste aussi chez les hydroides ordoviciennes.

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Publié-e

1991-09-01

Comment citer

Miller, M. A., & Willams, G. L. (1991). Ordovician chitinous hydroids from Hudson Strait, District of Franklin, Northwest Territories. Atlantic Geoscience, 27(2). https://doi.org/10.4138/1725

Numéro

Vol. 27 No. 2 (1991)

Rubrique

Articles

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