“…Sexual reproduction is known to occur in Ulvophyceae, Trebouxiophyceae, Chlorophyceae (UTC clade), and Sager (1954); 2, Cavalier- Smith (1970); 3, Kuroiwa et al (1982); 4, Lee et al (1990); 5, Coleman and Maguire (1983);6, Hamaji et al (2008);7, Stein (1958); 8, Adams et al (1990); 9, Coleman and Maguire (1982); 10, Kuroiwa et al (1993a); 11, Kuroiwa et al (1993b); 12, Kuroiwa et al (1985); 13, Kagami et al (2008); 14, Kawano (2008); 15, Mogi et al (2009);16, Bråten(1971);17, Fjeld (1971); 18, Bråten (1973); 19, Kuroiwa and Hori (1986); 20, Kuroiwa and Hori (1990); 21, Kuroiwa et al (1991);22, Ogawa (1988); 23, Lee et al (2002); 24, Miyamura and Nagumo (2007); 25, …”