Sirenicapillaria glauca D.E. Berthold, Lefler & Laughinghouse, 2022

Berthold, David E., Lefler, Forrest W. & Laughinghouse, H. Dail, 2022, Recognizing novel cyanobacterial diversity in marine benthic mats, with the description of Sirenicapillariaceae fam. nov., two new genera, Sirenicapillaria gen. nov. and Tigrinifilum gen. nov., and seven new species, Phycologia 61 (2), pp. 146-165 : 148

Sirenicapillaria glauca D.E. Berthold, Lefler & Laughinghouse sp. nov.

Figs 1–6

DESCRIPTION: Thallus erect, light to dark blue green. Filaments straight and somewhat flexuous, longer than 10 cm, 18.4–25.2(–28) µm wide with thick hyaline sheath. Trichomes cylindrical, (14–)15–20(–21) µm wide, thicker in the centre and gradually attenuated towards the ends. Cells slightly constricted at cross walls. Cells discoid, wider than long, 1.3– 2.8 µm long. Cell content light to dark green, blue green to greyish, with lightly pigmented cells towards apices. Apical cell rounded, at times conical, with occasional calyptra. Reproduction by straight or diagonal trichome fragmentation, hormogonia, and necridia.

TYPE LOCALITY: USA. Florida: Englewood, seagrass beds within Lemon Bay Aquatic Preserve (26°54.503 ʹ N, 82°20.365 ʹ W) .

HABITAT: Epipsammic, epiphytic and floating on marine water surface.

ETYMOLOGY: Latin adjective glaucus, -a, -um, in reference to the ‘sea green’ cell and thalli colour of this cyanobacterium.

HOLOTYPE: US 227772 (dried material in a metabolically inactive state of reference strain BLCC-M125 ), deposited in US National Herbarium, National Museum of Natural History, Smithsonian Institution , Washington, DC, USA.

REFERENCE STRAIN: BLCC-M 125.

MATERIALS ANALYSED: BLCC-M 125.

Figures

Figs 1–6. Images of Sirenicapillaria glauca (reference strain BLCC-M125). Fig. 1. Images showing hair-like thalli. Fig. 2. Microscope images showing variation in filament pigmentation. Scale bar = 100 µm. Fig. 3. Blue green cell colour. Scale bar = 50 µm. Fig. 4. Filament diagonal fragmentation Scale bar = 50 µm. Fig. 5. Yellow apical cell. Scale bar = 50 µm. Fig. 6. Filament ends without sheath. Scale bar = 50 µm.