Resumen de New Criteria for the Classifications of the "Porostromatae" Algae
The value of the generic and specific criteria presented and discussed for a part of the "Porostromatae" algae, which have a calcareous thallis composed of closely packed subcylindrical pores (tubes) or filaments sensu J. Pia (1927). Some attempts have already benn made to assing these structures to genera and species mostly referred to Cyanophyta and Chlorophyta.
