Hemiphragma (bryozoan)

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]

Hemiphragma
Temporal range: 488.3–445.6 Ma
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Bryozoa
Class: Stenolaemata
Order: Trepostomida
Family: Dittoporidae
Genus: Hemiphragma
Ulrich, 1893

References

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  1. ^ Bork, Kennard B.; Perry, T.G. (1968). "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. 42 (2): 337–355.