Hemiphragma (bryozoan)

{{Short description|Extinct genus of bryozoans}}

{{Automatic taxobox

| fossil_range = {{Geological_age|488.3|445.6}}

| taxon = Hemiphragma

| authority = Ulrich, 1893

}}

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.{{cite journal |last1=Bork |first1=Kennard B. |last2=Perry |first2=T.G. |title=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 |url=|journal=Journal of Paleontology |date=1968 |volume=42 |issue=2 |pages=337–355}}