Hemiphragma (bryozoan) explained

Hemiphragma is an extinct genus of Middle Ordovician bryozoan. It had branching colonies with thick-walled zooecial apertures and lots of acanthopores, but few mesopores.[1]

Notes and References

  1. Bork . Kennard B. . Perry . T.G. . Bryozoa (Ectoprocta) of Champlainian Age (Middle Ordovician) from Northwestern Illinois and Adjacent Parts of Iowa and Wisconsin. Part II. Bythotrypa, Diplotrypa, Hemiphragma, Heterotrypa, Stigmatella, Eridotrypa, and Nicholsonella . Journal of Paleontology . 1968 . 42 . 2 . 337–355.

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