Phylum Bryozoa

Bryozoans are very abundant in the Trenton Group limestones at West Canada Creek and it is only logical that bryozoan specimens make up a sizable portion of the MCZ's collections from this area. Even so, these specimens have not been properly identified or updated to mordern taxonomy. That is why this section will remain under construction until these specimens can be studied, because bryozoans do form an important part of the Ordovician ecosystem represented in the Trenton Group.

A program of thin sectioning and research of the Trenton bryozoa will soon begin at the MCZ. New cutting and grinding equipment have been aquired through this NSF grant to section and study specimens from the MCZ's large collection of Walcott-Rust Quarry bryozoa.

For publications concerning Trenton Group bryozoa the papers of June P. Ross, published between 1964 and 1970, are suggested reading:

  • Ross, June Phillips. 1964. Champlainian cryptostome Bryozoa from New York State Journal of
    Paleontology, 38:1-32.
  • Ross, June Phillips. 1967a. Evolution of ectoproct genus Prasopora in Trentonian time (Middle Ordovician) in northern and central United States. Journal of Paleontology, 41:403-416.
  • Ross, June Phillips. 1967b. Champlainian Ectoprocta (Bryozoa), New York State. Journal of
    Paleontology, 41:632-648.
  • Ross, June Philips. 1968.Trentonian trepostomata, New York State. Special Paper –
    Geological Society of America, 183 p.
  • Ross, June Phillips. 1969. Champlainian (Ordovician) Ectoprocta (Bryozoa), New York state,
    part II. Journal of Paleontology, 43:257-284.
  • Ross, June Phillips. 1970. Distribution, paleoecology and correlation of Champlainian
    Ectoprocta (Bryozoa), New York state, part III. Journal of Paleontology, 44:346-382.

The image below gives a simple idea of the types of bryozoans seen in the Trenton limestone (black arrows indicate a bryozoan specimen).

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