SAKAYAMA, Hidetoshi, Kazuyuki MIYAJI, Tamotsu NAGUMO, Masahiro KATO, Yoshiaki HARA, & Hisayoshi NOZAKI 2005 (Feb. 9) Taxonomic reexamination of 17 species of Nitella subgenus Tieffallenia (Charales, Charophyceae) based on internal morphology of the oospore wall and multiple DNA marker sequences J. Phycol. 41(1): 195-211, 9 figs., 4 tables [corrigendum, J. Phycol. 41(2): 447. 2005]