Previously, Choanoflagellida was divided into these three families based on the composition and structure of their periplast: Codonosigidae, Salpingoecidae and Acanthoecidae.
Anteriormente, os Choanoflagellida dividíanse en tres familias baseándose na composición e estrutura do seu periplasto, que eran: Codonosigidae, Salpingoecidae e Acanthoecidae.