Heterostigma (tunicate)

Heterostigma is a genus of ascidian tunicates in the family Pyuridae.
Species within the genus Heterostigma include:Heterostigma fagei Monniot C. & Monniot F., 1961 Heterostigma gonochorica Monniot F., 1965 Heterostigma mediterranea Pérès, 1958 Heterostigma melitensis Monniot F. & Monniot C., 1976 Heterostigma reptans Monniot C. & Monniot F., 1963 Heterostigma separ Ärnbäck, 1924
Species names currently considered to be synonyms:Heterostigma gravellophila Peres, 1955: synonym of Cratostigma gravellophila Heterostigma singulare : synonym of Cratostigma singularis Heterostigma singularis : synonym of ''Cratostigma singularis''