Umbonula patens

Umbonula is a genus of bryozoans belonging to the family Umbonulidae.
The genus has almost cosmopolitan distribution.
Species:

Umbonula alvareziana (d'Orbigny, 1842)
Umbonula austriensis David & Pouyet, 1974
Umbonula bartonensis Gregory, 1893
Umbonula boucheti David & Pouyet, 1970
Umbonula calcariformis Gregory, 1893
Umbonula cyrtoporoidea Koschinsky, 1885
Umbonula elongata Canu & Lecointre, 1930
Umbonula endlicheri (Reuss, 1847)
Umbonula gigantea Canu, 1912
Umbonula granulata Zágoršek, 2010
Umbonula leda Canu, 1908
Umbonula macrocheila (Reuss, 1847)
Umbonula margaritata Koschinsky, 1885
Umbonula megastoma (Busk, 1859)
Umbonula miser Canu & Bassler, 1920
Umbonula multispina David & Pouyet, 1972
Umbonula ovicellata Hastings, 1944
Umbonula paraboucheti David & Pouyet, 1972
Umbonula patens (Smitt, 1868)
Umbonula pliocenica Pouyet, 1976
Umbonula reteporacites Canu, 1908
Umbonula spinosa (Procházka, 1893)
Umbonula undulata Canu & Bassler, 1928
Umbonula wemmeliensis Canu & Bassler, 1929