METCALFE, S.E. 1988 Diatoms in a core from Laguna Zacapu, Michaocán, Mexico Proc. Ninth Int. Diatom Symp. [Bristol, 1986]. pp. 251-264, 5 + 4 figs, 1 table 1100 - 5299 yr. BP; incl. n.comb. in Synedra; 2nd group of figs. on undesignated included pls.; Michoacán misspelled in title |