1) Family volvocaceae 2) Protoctist family 
Eudorina Pandorina Platydorina Pleodorina Volvox Volvulina The Volvocaceae are a family of unicellular or colonial biflagellates, including the typical genus Volvox. The family was named by Ehrenberg in 1834, and is known in older classifications as the Volvocidae. The simplest of the Volvocaeans are ordered assemblies of cells, each similar to th...
[n] - unicellular or colonial biflagellate free-swimming flagellates
family Volvocaceae noun unicellular or colonial biflagellate free-swimming flagellates