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:
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|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Bryozoa |
| Class: | Stenolaemata |
| Order: | †Trepostomida |
| Family: | †Dittoporidae |
| Genus: | †Hemiphragma Ulrich, 1893 |
References
edit- ^ 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.