Laguna madre, Kenedy Ranch, sands flats (16_3). Mat material. Lyngbya sp. were a dominant on the surface. Lyngbya sp. is dominant with 50% of occurrence in the sample, Synechococcus sp. took ~40%, the rest of the species - 10%, in the 1 mm deep. Note:representatives of Coleofasciculus ssp. were in the little abundance to compare with the another samples.