Table 1.

Taxonomy of Volvocaceae

p	Taxon	Spp.	sp.	n	Σ
0.096	Astrephomene	2	−	64	10
0.079	Gonium
0.009	4-celled Gonium (Tetrabaeniaceae)	2	−	4	7
0.035	>4-cell Gonium	5	−	16–32	37
0.222	Pandorina + Volvulina clade
0.219	Pandorina morum/smithii	2	−	16	66
0.131	Volvulina	4	−	16–32	9
0.070	Yamagishiella = P. or E. charkowiensis = P. unicocca	1	−	32	13
0.158	Eudorina + E. illinoisensis = 4 Pleodorina illinoisensis	4	+	32–64	39
0.086	Platydorina clade	2	+	32	4
0.129	Pleodorina californica/japonica	2	+	128	4
0.025	Pleodorina indica	2	+	64	2
0.354	Volvox
0.087	Volvox Printz	4	+	>400	4
0.295	Merrilosphaera Shaw	9	+	>400	17
0.001	Janetosphaera Shaw	2	+	>400	5
0.025	Copelandosphaera Shaw	1	+	>400	3

p, maximum level of pairwise distance encompassed by the taxonomic category; Spp., number of species utilized; sp., make sperm packets; n, maximum number cells per vegetative colony; Σ, number of sequences utilized (see text).