It heads a group of moons called Portia Group , which includes Bianca , Cressida , Desdemona , Juliet , Rosalind , Cupid , Belinda and Perdita . It heads a group of satellites called the Portia Group , which includes Bianca , Cressida , Desdemona , Juliet , Rosalind , Cupid , Belinda and Perdita .