Berná L, Alvarez-Valin F, D'Onofrio G.

Comp Funct Genomics. 2009;2009:875901. doi:10.1155/2009/875901

How fast is the sessile ciona?

“Tajima’s test results [...] for the great majority of the alignments, Ciona genes evolve faster than those of all vertebrate groups[...].” “On the average, Ciona evolves 50% faster than all vertebrates, with the exception of O. anatinus and M. domestica.” “The divergence between C. intestinalis and C. savignyi was reestimated and found to took place ~184 (±15) My ago.”