Chez Charles/ biblio/ Mechanism of the block to hybridization and selfing between the sympatric ascidians Ciona intestinalis and Ciona savignyi.

Mol Reprod Dev. 2000 Jan;55(1):109-16 doi:10.1002/(SICI)1098-2795(200001)55:1%3C109::AID-MRD15%3E3.0.CO;2-B

Byrd J and Lambert CC.

Mechanism of the block to hybridization and selfing between the sympatric ascidians Ciona intestinalis and Ciona savignyi.

C. intestinalis and C. savignyi can cross-fertilise after removal of the vitelline enveloppe.