Cyphotrypa is massive, rarely ramose, with low monticules. Zooecia are polygonal and thin-walled, with diaphragms common in exozone. Lacks mesozooids. Styles have large clear lumen, and are typically common and occur at junctions of walls.
Cyphotrypa madisonensis Brown and Daly, 1985
Reference: Brown and Daly, 1985; Schumacher et al. in Davis and Cuffey, 1998 (mention)
Cyphotrypa osgoodensis Perry and Hattin, 1960
Reference: Brown and Daly, 1985
Cyphotrypa waynensis Utgaard and Perry, 1964
Reference: Utgaard and Perry, 1964