scytonema scytonema scytonema is a genus of photosynthetic cyanobacteria that contains over 100 species. it grows in filaments that form dark mats. many species are aquatic and are either free-floating or grow attached to a submerged substrate, while others species grow on terrestrial rocks, wood, soil, or plants. scytonema is a nitrogen fixer, and can provide fixed nitrogen to the leaves of plants on which it is growing. some species of scytonema form a symbiotic relationship with fungi to produce a lichen. scyptolin a scytonema scytonema, illustration scientific classification domain: bacteria phylum: cyanobacteria class: cyanophyceae order: nostocales family: scytonemataceae genus: scytonemac.agardh ex é.bornet & c.flahault, 1886 type species scytonema hofmaniic.agardh ex bornet & flahault species see text. heterocyst of scytonema crispum scyptolins are a type of elastase inhibitors isolated from some species of scytonema. a study comparing red macroalgae to scytonema species showed their potential for cosmetical use, both for their antioxidants properties and photoprotection capacities due to their compounds maas, and scytonemin (unique to scytonema). this study indicated that they could be used as photoprotectors absorbing both in the uv-b and uv-a. species scytonema includes the following subtaxa: scytonema amplum west & g.s.west scytonema andradeana p.gonzález scytonema arcangelii bornet & flahault scytonema arcangelii f. minus frémy scytonema austinii h.c.wood scytonema azureum tilden scytonema badium wolle scytonema belizensis komarék et al. scytonema bewsii f.e.fritsch & f.rich scytonema bilaspurense singh scytonema bivaginata h.welsh scytonema bohneri schmidle scytonema bruneum schmidle scytonema burmanicum skuja scytonema calcicola kufferath scytonema caldarium setchell scytonema caldarium var. terrestre copeland scytonema calothrichoides kützing scytonema capitatum n.l.gardner scytonema carolinianum philson scytonema catenatum n.l.gardner scytonema catenulum n.l.gardner scytonema chengii wang 1934 scytonema chiastum f. minor parukutty scytonema chiastum geitler scytonema chlorophaeum f. tenuis g.martens scytonema chorae c.l.sant'anna & j.komárek scytonema cineraceum c.l.zhou & h.x.xiao scytonema claviformis y.li scytonema coactile montagne ex bornet & flahault scytonema coactile var. brasilense nordstedt scytonema coactile var. minus wille scytonema coactile var. thermalis geitler scytonema conardii kufferath scytonema conchophilum humphrey scytonema concinnum y.m.lin & h.x.xiao scytonema consociatum c.-c.jao scytonema contortum m.watanabe & komárek scytonema cookei west scytonema costaricensis kufferath scytonema crassum var. indicum s.silva scytonema crispum bornet ex de toni scytonema crispum subsp. minu l.c.li scytonema crispum var. aethiopicum west & g.s.west scytonema crustaceum var. incrustans bornet & flahault scytonema cuatrecasasii p.gonzález scytonema dilatatum bharadwaja scytonema dilatatum f. major bharadwaja scytonema drilosiphon elenkin & v.i.polyansky scytonema dubium de wildeman scytonema echeverriae kufferath scytonema endolithicum ercegovic scytonema evanescens n.l.gardner scytonema fertilia m.watanabe & komárek scytonema figuratum c.agardh ex bornet & flahault scytonema flavoviride bornet & flahault scytonema flexuosum meneghini ex kützing scytonema foliicola de wildeman scytonema foliicola var. maius n.l.gardner scytonema fremyi desikachary scytonema fritschii s.l.ghose scytonema furcatum meneghini ex trevisan scytonema geitleri bharadwaja scytonema geitleri var. tenuis bharadwaja scytonema gomontii gutwinski scytonema granulatum g.martens scytonema guyanense bornet & flahault scytonema guyanense var. minus n.l.gardner scytonema guyanense var. prolifera bharadwaja scytonema hamelinii gebelein scytonema hansgirgii schmidle scytonema hieronymi schmidle scytonema hofmanii c.agardh ex bornet & flahault scytonema hofmanii f. phormidioides frémy scytonema hofmanii var. calcicola hansgirg scytonema hofmanii var. crassum bharadwaja scytonema hofmanii var. symplocoides bornet & flahault scytonema holstii hieronymous scytonema hormocystum zhu, 1987 scytonema hyalinum n.l.gardner scytonema immersum h.c.wood scytonema inaequale kufferath scytonema incrassatum c.-c.jao scytonema induratum j.j.copeland scytonema insigne west & g.s.west scytonema insulare c.l.sant'anna scytonema intermedium de wildeman scytonema intertextum rabenhorst scytonema involvens var. elongatum bourrelly scytonema iyengarii bharadwaja scytonema javanicum bornet ex bornet & flahault scytonema javanicum var. distortum n.l.gardner scytonema javanicum var. hawaiiense lemmermann scytonema javanicum var. pallidum n.l.gardner scytonema julianum meneghini ex b.a.whitton scytonema junipericola farlow scytonema keiense weber-van bosse scytonema kwangsiense c.-c.jao scytonema leprieurii montagne ex bornet & flahault scytonema leptobasis ghose scytonema longiarticulatum n.l.gardner scytonema lyngbyoides n.l.gardner scytonema maculiforme schmidle scytonema magnum n.l.gardner scytonema malaviyanense bharadwaja scytonema masonianum h.welsh scytonema millei bornet ex bornet & flahault scytonema millei var. maius n.l.gardner scytonema minus (schmidle) lemmermann scytonema minus var. istvanffianum kol scytonema mirabile bornet scytonema mirabile f. minus bharadwaja scytonema mirabile f. zonatum geitler scytonema mirabile var. majus n.l.gardner scytonema mirabile var. rhaeticum brügge scytonema multiramosum n.l.gardner scytonema multiramosum var. ceylonicum bharadwaja scytonema myochrous c.agardh ex bornet & flahault scytonema myochrous var. decumbens (kützing) rabenhorst scytonema obscurum hansgirg ex hirn scytonema obscurum var. terrestre hansgirg scytonema occidentale setchell scytonema ocellatum lyngbye ex bornet & flahault scytonema ocellatum var. capitatum ghose scytonema ocellatum var. constrictum n.l.gardner scytonema ocellatum var. maius n.l.gardner scytonema ocellatum var. purpureum n.l.gardner scytonema olivaceum zeller scytonema orientale c.-c.jao scytonema papillicapitatum c.l.sant'anna & j.komárek scytonema papuasicum borzì scytonema parlatorii fiorini-mazzanti ex bornet & flahault scytonema parvulum zeller scytonema pascheri bharadwaja scytonema pellucidum c.cramer scytonema planum copeland scytonema polycystum bornet & flahault scytonema polycystum var. aethiopicum west & g.s.west scytonema polymorphum jaag scytonema praegnans skuja scytonema pratii komárek scytonema pseudoguyanense bharadwaja scytonema pseudohofmanii bharadwaja scytonema pseudopunctatum skuja scytonema pulchellum n.l.gardner scytonema pulvinatum nordstedt scytonema punctatum n.l.gardner scytonema racovitzae de wildeman scytonema rhizophorae zeller scytonema rivulare borzì ex bornet & flahault scytonema saleyeriense var. indica bharadwaja scytonema saleyeriense weber-van bosse scytonema samoense wille scytonema sanpaulense sant'anna scytonema santannae hentschke & j.komárek scytonema schmidlei j.b.de toni scytonema schmidtii gomont scytonema seagriefianum welsh scytonema siculum borzì ex bornet & flahault scytonema simmeri schmidle scytonema simplex bharadwaja scytonema simplex f. majus vasishta scytonema simplice wood scytonema sinense c.-c.jao scytonema singhii singh scytonema spirulinoides n.l.gardner scytonema splendens f.e.fritsch & f.rich scytonema stuposum bornet ex bornet & flahault scytonema stygium heufler scytonema subclavatum zeller scytonema subcoactile c.-c.jao scytonema subcoactile var. aurantiacum sarthou, thérézien & couté scytonema subgelatinosum n.l.gardner scytonema subtile k.möbius scytonema tenellum n.l.gardner scytonema tenue n.l.gardner scytonema thermale friedrich traugott kützingkützing scytonema tolypothrichoides friedrich traugott kützingkützing ex bornet & flahault scytonema tolypotrichoides f. terrestris bharadwaja scytonema tomentosum kützing scytonema torulosum c.-c.jao scytonema turicense var. muscicola hepp scytonema twymanianum welsh scytonema variabile n.l.gardner scytonema varium kützing ex bornet & flahault scytonema vieillardii g.martens scytonema violascens zeller scytonema wolleanum forti scytonema zellerianum brühl & biswas