taxonID	type	description	language	source
0B31D43C6F165A5CFF9CFA98FE4E6868.taxon	description	DESCRIPTION: Homocytous filamentous cyanobacteria, forming dark brown, blue green erect thallus on benthos. Long coarse filaments (c. 10 cm) with thick, sometimes facultative and lamellate hyaline sheath. Trichomes cylindrical, thicker in the centre and slowly attenuated towards apices, uniseriate, constricted at cross-walls. Cells discoid, shorter than wide. Cell content light to dark brown, greyish green and blue green. Apical cell rounded, narrowed at times, with occasional calyptra. Reproduction by release of individual cells, straight or diagonal trichome fragmentation, necridia, hormogonia. Rarely false branches.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF9CFA98FE4E6868.taxon	type_taxon	TYPE SPECIES: Sirenicapillaria stauglerae D. E. Berthold, Lefler & Laughinghouse sp. nov.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF9CFA98FE4E6868.taxon	etymology	ETYMOLOGY: From Latin Siren (Greek Σειρήν), a Siren, and Latin capillus, hair, in reference to the long thalli and ‘ mermaid’s hair’ appearance of these marine cyanobacteria.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF52F8F7FBC56D81.taxon	description	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.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF52F8F7FBC56D81.taxon	materials_examined	TYPE LOCALITY: USA. Florida: Englewood, seagrass beds within Lemon Bay Aquatic Preserve (26 ° 54.503 ʹ N, 82 ° 20.365 ʹ W).	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF52F8F7FBC56D81.taxon	biology_ecology	HABITAT: Epipsammic, epiphytic and floating on marine water surface.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF52F8F7FBC56D81.taxon	etymology	ETYMOLOGY: Latin adjective glaucus, - a, - um, in reference to the ‘ sea green’ cell and thalli colour of this cyanobacterium.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF52F8F7FBC56D81.taxon	materials_examined	HOLOTYPE: US 227772 (dried material in a metabolically inactive state of reference strain BLCC-M 125), 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.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFC97FCA8FCC269E1.taxon	description	Figs 7 – 15 DESCRIPTION: Thallus dark brown, tangled, web-like. Filaments straight and rigid, 5 cm long, 28 – 83 (– 94) µm wide with thick, lamellate hyaline sheath. Trichomes cylindrical, 22.8 – 63.3 µm wide, thicker in the middle and gradually attenuated towards apices. Cells slightly constricted at cross walls. Cells discoid, wider than long, 1.8 – 3.9 µm long. Cell content light to dark brown, with pigmentless cells towards apices. Apical cell rounded, at times conical, with occasional calyptra. Reproduction by release of individual cells, straight or diagonal trichome fragmentation, necridia, hormogonia.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFC97FCA8FCC269E1.taxon	discussion	COMMENT: Individual filaments observed with naked eye and reminiscent of the freshwater Microseira wollei. Hormogonia form attached clumps on individual filaments.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFC97FCA8FCC269E1.taxon	materials_examined	TYPE LOCALITY: USA. Florida: Duck Key (24 ° 46.635 ʹ N, 80 ° 54.527 ʹ W). HABITAT: Benthic, wrapped around seagrasses in marine coasts.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFC97FCA8FCC269E1.taxon	etymology	ETYMOLOGY: Latin adjective rigidus, - a, - um, in reference to the physical rigidity of the filaments.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFC97FCA8FCC269E1.taxon	materials_examined	HOLOTYPE: US 227691 (dried material in a metabolically inactive state of reference strain BLCC-M 116), deposited in US National Herbarium, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA. REFERENCE STRAIN: BLCC-M 116. MATERIALS ANALYSED: BLCC-M 116 (US 227691), BLCC-M 134 (US 227777).	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF8BFEC8FE766B51.taxon	description	DESCRIPTION: Homocytous, uniseriate, isopolar, straight to slightly curved to coiled, filamentous. Thalli planktonic and / or attached to substrata and vegetation, prostrate, erect, fascicular or not. Euryhaline. Filaments with or without sheaths. Trichomes with or without constriction at cross wall. Cell content granulated typically at cross-walls. Cells discoid, apical cells range from bluntly rounded, to conical rounded, to rounded, calyptra present or not. Reproduction by single cell release, hormogonia, and / or diagonal fragmentation. False branching is rare. Currently, this family includes the genera Affixifilum, Capilliphycus, Limnoraphis, Limnospira, Neolyngbya, Sirenicapillaria and Tigrinifilum, which differ by 16 S rRNA phylogeny.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF8BFEC8FE766B51.taxon	diagnosis	DIAGNOSIS: Monophyletic group of marine / brackish / freshwater genera based on the 16 S rRNA gene phylogeny, sister to the Laspinemataceae clade.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF8BFEC8FE766B51.taxon	discussion	COMMENT: Genera are commonly found in marine coastal areas, with some found in inland waters. Some genera display desiccation tolerance and growth in hypersalinity.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF8BFEC8FE766B51.taxon	etymology	ETYMOLOGY: Name based on the genus Sirenicapillaria, a rigid marine filamentous cyanobacterium that forms nuisance benthic blooms across the Florida western and southern coasts.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5CFF8BFEC8FE766B51.taxon	type_taxon	TYPE GENUS: Sirenicapillaria gen. nov.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5BFCBEF908FF196C6E.taxon	description	Figs 16 – 26 DESCRIPTION: Thallus erect, light to dark brown, almost black. Filaments straight and flexuous, 5 cm long, 12.5 – 33 (– 35) µm wide with thick hyaline sheath. Trichomes cylindrical, 10 – 26.8 µm wide, thicker in the centre and gradually attenuated towards apices. Cells slightly constricted at cross walls. Cells discoid, wider than long, 1.0 – 2.4 µm long. Cell content light to dark brown, grey to red, with pigmentless cells towards apices. Apical cell rounded, at times conical, with occasional calyptra. Reproduction by straight or diagonal trichome fragmentation, hormogonia and necridia. Rarely false branches.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5BFCBEF908FF196C6E.taxon	discussion	COMMENT: Filament ends usually do not have thick sheaths, while midfilaments usually have thick lamellate hyaline sheaths.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5BFCBEF908FF196C6E.taxon	materials_examined	TYPE LOCALITY: USA. Florida: Englewood, seagrass beds within Lemon Bay Aquatic Preserve (26 ° 54.503 ʹ N, 82 ° 20.365 ʹ W).	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5BFCBEF908FF196C6E.taxon	biology_ecology	HABITAT: Benthic on marine coasts.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5BFCBEF908FF196C6E.taxon	etymology	ETYMOLOGY: The epithet stauglerae is in honour of Elizabeth ‘ Betty’ Staugler for her committed work in studying and surveying coastal marine habitats and the ‘ Eyes on Seagrass’ Florida Sea Grant Extension programme, which first noted the emergence of this cyanobacterium blanketing areas that had previously been inhabited by seagrasses.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F165A5BFCBEF908FF196C6E.taxon	materials_examined	HOLOTYPE: US 227770 (dried material in a metabolically inactive state of reference strain BLCC-M 121), deposited in US National Herbarium, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA. REFERENCE STRAIN: BLCC-M 121. MATERIALS ANALYSED: BLCC-M 121, BLCC-M 122, BLCC-M 123, BLCC-M 138.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFF73FB91FF556936.taxon	description	DESCRIPTION: Homocytous filamentous cyanobacteria forming solitary and free-floating, straight, wavy to slightly flexuous filaments, with or without thin hyaline sheath. Trichomes cylindrical. Cells slightly constricted between meristematic zones, highly constricted between dividing cells in older filaments. Cross-walls densely granulated and darkened except at the filament ends. Cells discoid, wider than long. Cell content light to dark green, blue green, brown, and grey. Apical cell rounded, with occasional clear calyptra. Reproduction by fragmentation or hormogonia.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFF73FB91FF556936.taxon	type_taxon	TYPE SPECIES: Tigrinifilum floridanum D. E. Berthold, Lefler & Laughinghouse sp. nov.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFF73FB91FF556936.taxon	etymology	ETYMOLOGY: From Latin tigrinus, striped like a tiger, and Latin filum, a thread, in reference to the resemblance of a ‘ banded tiger’ characteristic of the filaments.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFF73FB91FF556936.taxon	discussion	COMMENT: Species of this genus are halotolerant-halophilic and resistant to desiccation.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFF4BF9D9FA026D04.taxon	description	Figs 27 – 29, 31 – 33, 36 – 38 DESCRIPTION: Filaments solitary and free-floating, or attached to substrate. Filaments straight, wavy, to flexuous, (9 –) 10.2 – 19 µm wide with thick hyaline sheath. Trichomes cylindrical, (7 –) 8.0 – 19.2 µm wide. Cells slightly constricted between meristematic zones, highly constricted between dividing cells in older filaments. Cross-walls densely granulated and darkened. Cells discoid, wider than long, rarely isodiametric, 1.0 – 2.7 µm long. Cell content light to dark green, blue green, brown, and grey. Apical cell rounded, with occasional clear calyptra. Reproduction by fragmentation or hormogonia.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFF4BF9D9FA026D04.taxon	materials_examined	TYPE LOCALITY: USA. Florida: Elliot Key (Biscayne Bay) (25 ° 23.810 ʹ N, 80 ° 14.043 ʹ W).	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFF4BF9D9FA026D04.taxon	biology_ecology	HABITAT: Entangled within larger benthic cyanobacteria or dislodged floating mats.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFF4BF9D9FA026D04.taxon	etymology	ETYMOLOGY: Latin floridanum, in reference to the widespread occurrence of this cyanobacterium throughout the southern Florida coast.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFF4BF9D9FA026D04.taxon	materials_examined	HOLOTYPE: US 223427 (dried material in a metabolically inactive state of reference strain BLCC-M 48), deposited in US National Herbarium, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA. REFERENCE STRAIN: BLCC-M 48. MATERIALS ANALYSED: BLCC-M 48, BLCC-M 50, BLCC-M 51, BLCC-M 57, BLCC-M 66, BLCC-M 73, BLCC-M 77, BLCC-M 85, BLCC-M 87, BLCC-M 102, BLCC-M 107, BLCC-M 118, BLCC-M 119, BLCC-M 120.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFC81FD2BFBCE6AEA.taxon	description	Figs 30, 34, 35 DESCRIPTION: Thallus solitary, floccose, free-floating, light to dark blue green. Filaments straight, wavy to flexuous, without sheath. Trichomes cylindrical, 5.3 – 6.2 µm wide. Cells slightly constricted between meristematic zones, highly constricted between dividing cells in older filaments. Cross-walls densely granulated and darkened. Cells discoid, wider than long, rarely isodiametric, 1.5 – 2.9 µm long. Cell content light to dark green, blue green, brown and grey. Apical cell rounded. Reproduction by filament disintegration or fragmentation.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFC81FD2BFBCE6AEA.taxon	materials_examined	TYPE LOCALITY: FRANCE. Loire-Atlantique: Guérande, Terre de Sel (47 ° 18.938 ʹ N, 2 ° 27.197 ʹ W).	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFC81FD2BFBCE6AEA.taxon	biology_ecology	HABITAT: Entangled within cyanobacterial mats of inland salt flats.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFC81FD2BFBCE6AEA.taxon	etymology	ETYMOLOGY: The epithet guerandense, is a reference to the salt flats in Guérande where the species originates.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5BFC81FD2BFBCE6AEA.taxon	materials_examined	HOLOTYPE: US 227675 (dried material in a metabolically inactive state of reference strain BLCC-M 99), deposited in US National Herbarium, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA. REFERENCE STRAIN: BLCC-M 99. MATERIALS ANALYSED: BLCC-M 99.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5AFC93F915FD0B6D4E.taxon	description	Figs 39 – 44 DESCRIPTION: Thallus amorphous and entangled, mat-like. Filaments straight, 14 – 18.9 µm in diameter, rarely coiled. Sheath thick, facultative, hyaline, not lamellate. Cells slightly constricted. Cross walls densely granulated. Cells discoid, wider than long, 10.7 – 14 µm wide, 1.4 – 2.4 µm long. Cell content green, green-yellow, and yellow at apices. Apices conical to rounded, without calyptra. Hormogonia formed by straight fragmentation, with or without necridic cells. Diagonal fragmentation occurs with or without necridic cells.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5AFC93F915FD0B6D4E.taxon	materials_examined	TYPE LOCALITY: USA. Florida: Key Biscayne (25 ° 43.588 ʹ N, 80 ° 09.513 ʹ W).	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5AFC93F915FD0B6D4E.taxon	biology_ecology	HABITAT: Found within floating marine mats of larger filamentous cyanobacteria.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5AFC93F915FD0B6D4E.taxon	etymology	ETYMOLOGY: Latin adjective flavus, - a, - um, yellow, and Latin ending - ceps (caput), head, in reference to the tendency for yellowing of the apices of the trichome.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F115A5AFC93F915FD0B6D4E.taxon	materials_examined	HOLOTYPE: US 227779 (dried material in a metabolically inactive state of reference strain BLCC-M 137), deposited in US National Herbarium, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA. REFERENCE STRAIN: BLCC-M 137. MATERIALS ANALYSED: BLCC-M 137, BLCC-M 53 (US 227634).	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F105A5AFF74FDD1FD1C6AFA.taxon	description	Figs 45 – 48 DESCRIPTION: Thallus light to dark forest green, and yellow to orange when exposed to air (drying). Filaments straight to flexuous, 18.5 – 29.2 µm in diameter, rarely coiled. Sheath thin, facultative, hyaline, not lamellate. Cells not constricted. Cells discoid, wider than long, 15.8 – 24.9 µm wide, 1 – 2.2 µm long. Cell content green. Apices conical to rounded, attenuating, without calyptra. Apical cell yellow. Hormogonia formed by straight fragmentation, with or without necridic cells. Diagonal fragmentation occurs with or without necridic cells.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F105A5AFF74FDD1FD1C6AFA.taxon	discussion	COMMENT: This species grows partially submerged.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F105A5AFF74FDD1FD1C6AFA.taxon	materials_examined	TYPE LOCALITY: FRANCE. Loire-Atlantique: Guérande, Terre de Sel (47 ° 18.938 ʹ N, 2 ° 27 ʹ 11.850 ” W) HABITAT: Hypersaline pools within inland salt flats.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F105A5AFF74FDD1FD1C6AFA.taxon	etymology	ETYMOLOGY: The epithet guerandensis is a reference to the salt flats in Guérande where the species originates.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F105A5AFF74FDD1FD1C6AFA.taxon	materials_examined	HOLOTYPE: US 227655 (dried material in a metabolically inactive state of reference strain BLCC-M 76), deposited in US National Herbarium, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA. REFERENCE STRAIN: BLCC-M 76. MATERIALS ANALYSED: BLCC-M 76, BLCC-M 92 (US 227668).	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F105A5AFF67FA05FD806870.taxon	discussion	COMMENT: Our material fits the original description of this species in Caires et al. (2018 b) and clusters together with Capilliphycus tropicalis in the 16 S rRNA gene sequence phylogenetic tree.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F105A5AFF67FA05FD806870.taxon	description	SPECIES FEATURES: Thallus green and entangled, mat-like. Filaments straight, 11.8 – 16.8 µm in diameter. Sheath hyaline. Cells light to dark green. Cells discoid, wider than long, 8.4 – 12 µm wide, 1 – 2.1 µm long. This is the first report of this species outside of Brazil.	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
0B31D43C6F105A5AFF67FA05FD806870.taxon	materials_examined	MATERIALS ANALYSED: BLCC-M 106 (US 227681).	en	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): 146-165, DOI: 10.1080/00318884.2021.2006589, URL: https://doi.org/10.1080/00318884.2021.2006589
