Morphometric Characterization And The First Taxonomic Synthesis Of Terrestrial Cyanobacteria From The Atlantic Forest In Northeastern Brazil Author Da Anunciação, Raylane R. Graduate Program in Biodiversity (PPGBio), Federal Rural University of Pernambuco, Rua D. Manoel de Medeiros, S / N, Dois Irmãos, CEP 52171 - 030, Recife, PE, Brazil Author Paulino, Jonatas M. Graduate Program in Biodiversity (PPGBio), Federal Rural University of Pernambuco, Rua D. Manoel de Medeiros, S / N, Dois Irmãos, CEP 52171 - 030, Recife, PE, Brazil Author Moura, Ariadne N. Graduate Program in Biodiversity (PPGBio), Federal Rural University of Pernambuco, Rua D. Manoel de Medeiros, S / N, Dois Irmãos, CEP 52171 - 030, Recife, PE, Brazil Author Laughinghouse IV, H. Dail Agronomy Department, Fort Lauderdale Research and Education Center, University of Florida - IFAS, 3205 College Avenue, Davie, FL 33314, USA Author Gama, Watson A. Graduate Program in Biodiversity (PPGBio), Federal Rural University of Pernambuco, Rua D. Manoel de Medeiros, S / N, Dois Irmãos, CEP 52171 - 030, Recife, PE, Brazil watson.arantes@ufrpe.br text Phytotaxa 2024 2024-04-30 646 1 1 31 http://dx.doi.org/10.11646/phytotaxa.646.1.1 journal article 305607 10.11646/phytotaxa.646.1.1 76333385-44ec-421a-8f34-09919b553d44 1179-3163 13215154 Hassallia byssoidea Hassall ex Bornet et Flahault (1886: 116) ( Fig. 15A–C ). Filaments entangled to solitary, epiphytic on other cyanobacteria, 8.16–10.78 µm wide. Sheath firm, 0.63–1.23 µm wide, non-lamellated, hyaline to brown. Trichomes attenuated, branches tolypothricoid, not constricted. Apical cell rounded. Cells short, 6.64–9.7 µm wide, 1.85–4.45 µm long, ratio l/w = 0.40. Cell content granulated, blue-green. Basal heterocyte elliptical, 7.23–9.64 µm wide, 4.91–7.42 µm long. Necridia present. Habitat: —Bricks; associated with Gloeocapsopsis sp .. Concrete; associated with Gloeocapsopsis pleurocapsoides and Chlorogloea sp.1 . Tree bark inside the forest; associated with Gloeocapsa sp.1 , Chlorogloea sp.1 , Gloeocapsa compacta and Gloeocapsa stegophila . Studied material: — PEUFR55783 , PEUFR55784 , PEUFR55787