Coleofasciculus sp.

Nighthawk location, Laguna madre.

Laguna madre, Kenedy Ranch, sands flats, dry conditions (14_3). Formaldehyde preserved mat.

Laguna madre, Kenedy Ranch, sands flats, submerged conditions (14_1).Formaldehyde preserved mat. Surface: Lyngbya sp. - 90%, Coleofasciculus sp. - 10%. Slimy layer below the surface: Coleofasciculus sp. - 40%, Coleofasciculus chthonoplastes - 50%, Lyngbya sp. - 10%. 2 mm deep: Coleofasciculus chthonoplastes -100%, with very rare occurrence among sediments. Note: Thickness of the mat is ~ 1 mm, with well developed surface layer (Lyngbya sp.). Diatoms are noticeable.

Laguna madre, Kenedy Ranch, sands flats (15_4). Preserved material with formaldehyde. Surface: Lyngbya sp. - 25%, Schizothrix sp. - 25%, Coleofasciculus chthonoplaste - 25%, Coleofasciculus sp. -25%. Slimy layer below the surface: absent (very thin mat). 2 mm deep: Coleofasciculus chthonoplastes - 4%, Schizothrix - 1%, empty sheaths - 95%. Note: Thickness of the mat (colored surface layer) is ~ 0.5 mm.