By Martina P | 10:04 PM UTC, Sat March 31, 2012 Year 1986 pH 8.1 Species Chrysosphaerella brevispina Mallomonas alpina Mallomonas annulata Mallomonas heterospina Mallomonas papillosa Mallomonas schwemmlei Mallomonas striata var. striata Mallomonas tonsurata Paraphysomonas vestita Synura petersenii Mallomonas teilingii Mallomonas acaroides References HARTMANN & STEINBERG (1989)