Index Nominum Algarum Image Index
620 CARD IMAGES
beginning with HYSTRICHOSPHAERA
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Return to master index - HYSTRICHOSPHAERA O. Wetzel
- HYSTRICHOSPHAERA Deflandre {subgenus}
- HYSTRICHOSPHAERA {Gruppe}
- HYSTRICHOSPHAERA section BIFORMES Wiesner
- HYSTRICHOSPHAERA subgenera HYSTRICHOSPHAERA Deflandre
- Hystrichosphaera assamica Kar, R.Y. Singh & Sah
- Hystrichosphaera asteroidea Maslov
- Hystrichosphaera bentori Rossignol
- Hystrichosphaera bentori Rossignol
- Hystrichosphaera biformis Wiesner
- Hystrichosphaera borussica Eisenack
- Hystrichosphaera buccina R.J. Davey & G.L. Williams
- Hystrichosphaera bulbosa (Ehrenberg) O. Wetzel
- Hystrichosphaera bulloidea Deflandre & Cookson
- Hystrichosphaera ceratioides Deflandre
- Hystrichosphaera cingulata (O. Wetzel) Deflandre
- Hystrichosphaera cingulata var. granulata Clarke & Verdier
- Hystrichosphaera cingulata var. perforata Clarke & Verdier
- Hystrichosphaera cingulata var. polygonalis Clarke & Verdier
- Hystrichosphaera cingulata var. reticulata Davey & Williams
- Hystrichosphaera communis O. Wetzel
- Hystrichosphaera cornigera O. Wetzel
- Hystrichosphaera cornuta Gerlach
- Hystrichosphaera cornuta var. laevimura Davey & Williams
- Hystrichosphaera crassimurata Davey & Williams
- Hystrichosphaera crassipellis Deflandre & Cookson
- Hystrichosphaera crassipellis Deflandre & Cookson
- Hystrichosphaera cristata Conrad
- Hystrichosphaera cruciata O. Wetzel
- Hystrichosphaera dentata H. Gocht
- Hystrichosphaera furcata (Ehrenberg) O. Wetzel
- Hystrichosphaera furcata ssp. augusta W. Wetzel
- Hystrichosphaera furcata f. aulosphaeropsis O. Wetzel
- Hystrichosphaera furcata var. multibrachiata de Wit
- Hystrichosphaera furcata var. ramosa (Ehrenberg) de Wit
- Hystrichosphaera granulata Davey
- Hystrichosphaera heterostylis Heisecke
- Hystrichosphaera hirsuta (Ralfs) O. Wetzel
- Hystrichosphaera hirsuta f. minor O. Wetzel
- Hystrichosphaera hirsuta f. varians O. Wetzel
- Hystrichosphaera hirsutoides (Eisenack) [Deunff]
- Hystrichosphaera hyperacantha Deflandre & Cookson
- Hystrichosphaera inconspicua Deflandre
- Hystrichosphaera intermedia O. Wetzel
- Hystrichosphaera leptoderma (Maier) Davey & Williams
- Hystrichosphaera longispinosa (Eisenack) O. Wetzel
- Hystrichosphaera longispinosa f. pumilis O. Wetzel
- Hystrichosphaera membranosa Archangelsky
- Hystrichosphaera mensula O. Wetzel
- Hystrichosphaera mirabilis Rossignol
- Hystrichosphaera mirabilis M. Rossignol
- Hystrichosphaera monilis Davey & Williams
- Hystrichosphaera nodosa Wall
- Hystrichosphaera avum (Deflandre) Deflandre
- Hystrichosphaera paradoxa Cookson & Eisenack
- Hystrichosphaera pedata O. Wetzel
- Hystrichosphaera penicillata (C.G. Ehrenberg) O. Wetzel
- Hystrichosphaera penicillata f. coronata O. Wetzel
- Hystrichosphaera penicillata f. medusettiformis O. Wetzel
- Hystrichosphaera penicillata f. rhizopodiphora O. Wetzel
- Hystrichosphaera perforata Davey & Williams
- Hystrichosphaera pilosa (C.G. Ehrenberg) O. Wetzel
- Hystrichosphaera pilosa f. nana O. Wetzel
- Hystrichosphaera porosa Manum & Cookson
- Hystrichosphaera pseudofurcata Varma & Dangwal
- Hystrichosphaera pseudofurcata (Klumpp) Gocht
- Hystrichosphaera pterota (Cookson & Eisenack) Eisenack
- Hystrichosphaera ramosa (Ehrenberg) O. Wetzel
- Hystrichosphaera ramosa var. gracilis Davey & Williams
- Hystrichosphaera ramosa var. granomembranacea Davey & Williams
- Hystrichosphaera ramosa var. granosa Davey & Williams
- Hystrichosphaera ramosa var. multibrevis Davey & Williams
- Hystrichosphaera ramosa var. reticulata R.J. Davey & Williams
- Hystrichosphaera salpingophora Deflandre
- Hystrichosphaera scabrata Wall
- Hystrichosphaera scabrosa Clarke & Verdier
- Hystrichosphaera speciosa Deflandre
- Hystrichosphaera suppara Drugg
- Hystrichosphaera tenuicapillata O. Wetzel
- Hystrichosphaera tenuicapillata f. irregularis O. Wetzel
- Hystrichosphaera tenuicapillata f. pinopollina O. Wetzel
- Hystrichosphaera tenuicapillata f. turbilineata O. Wetzel
- Hystrichosphaera tertiaria Eisenack & Gocht
- Hystrichosphaera tertiaria var. obliqua Wall
- Hystrichosphaera tubifera (Ehrenberg) O. Wetzel
- Hystrichosphaera wetzelii ('wetzeli') Deflandre
- Hystrichosphaera xanthopyxides O. Wetzel
- HYSTRICHOSPHAERIDIUM Deflandre
- Hystrichosphaeridium aculeatum Timofeev
- Hystrichosphaeridium aemulum Deflandre
- Hystrichosphaeridium albertense S. A. J. Pocock
- Hystrichosphaeridium alcicornu Eisenack
- Hystrichosphaeridium ancoriferum Cookson & Eisenack
- Hystrichosphaeridium annulatum Timofeev
- Hystrichosphaeridium anthophorum Cookson & Eisenack
- Hystrichosphaeridium apiculatum Timofeev
- Hystrichosphaeridium aquitanicum Deunff
- Hystrichosphaeridium arborispinum Davey & Williams
- Hystrichosphaeridium armatum Deflandre
- Hystrichosphaeridium arrectum Timofeev
- Hystrichosphaeridium articulatum (Wetzel) Pastiels
- Hystrichosphaeridium aruncium Tasch
- Hystrichosphaeridium arundum Eisenack & Cookson
- Hystrichosphaeridium ashdodense Rossignol
- Hystrichosphaeridium ashdodense Rossignol
- Hystrichosphaeridium asperum Maier
- Hystrichosphaeridium astartes Sannemann
- Hystrichosphaeridium asterigerum Gocht
- Hystrichosphaeridium asterium Eaton
- Hystrichosphaeridium asymmetricum Deflandre & Courteville
- Hystrichosphaeridium balticum Eisenack
- Hystrichosphaeridium biformoides Eisenack
- Hystrichosphaeridium bimarginatum Timofeev
- Hystrichosphaeridium bowerbankii ('bowerbanki') Davey & Williams
- Hystrichosphaeridium breviatum Morgenroth
- Hystrichosphaeridium brevifurcatum Eisenack
- Hystrichosphaeridium brevispinosum (Eisenack) Pastiels
- Hystrichosphaeridium brevispinosum subsp. callosum Sannemann
- Hystrichosphaeridium brevispinosum subsp. castaneoides Sannemann
- Hystrichosphaeridium brevispinosum var. nanum Deflandre
- Hystrichosphaeridium bulbosum (Ehrenberg) Deflandre
- Hystrichosphaeridium calvum Tasch
- Hystrichosphaeridium cambayense Varma & Dangwal
- Hystrichosphaeridium caminuspinum Wall
- Hystrichosphaeridium cantharellum Brosius
- Hystrichosphaeridium capitatum Cookson & Eisenack
- Hystrichosphaeridium castaneum (Eisenack) Sannemann
- Hystrichosphaeridium caulleryi Deflandre
- Hystrichosphaeridium centrocarpum Deflandre & Cookson
- Hystrichosphaeridium choanophorum Deflandre & Cookson
- Hystrichosphaeridium choanophorum Deflandre & Cookson
- Hystrichosphaeridium circumscissum Timofeev
- Hystrichosphaeridium clavicularum Deflandre
- Hystrichosphaeridium clavigerum Deflandre
- Hystrichosphaeridium coelenteratum Tasch
- Hystrichosphaeridium cognitum Timofeev
- Hystrichosphaeridium colligerum Deflandre & Cookson
- Hystrichosphaeridium collum Tasch
- Hystrichosphaeridium coniferum Sannemann
- Hystrichosphaeridium conspicuum Timofeev
- Hystrichosphaeridium cornigerum (O. Wetzel) de Wit
- Hystrichosphaeridium corollatum Timofeev
- Hystrichosphaeridium costatum Davey & Williams
- Hystrichosphaeridium cribrotubiferum Sarjeant
- Hystrichosphaeridium cristatum Downie
- Hystrichosphaeridium cylindratum Brideaux
- Hystrichosphaeridium danicum (W. Wetzel) W. Wetzel
- Hystrichosphaeridium deanei Davey & Williams
- Hystrichosphaeridium deflandrei Valensi
- Hystrichosphaeridium dictyophorum Cookson & Eisenack
- Hystrichosphaeridium dictyostilum Menendez
- Hystrichosphaeridium differtum Sannemann
- Hystrichosphaeridium difficile Manum & Cookson
- Hystrichosphaeridium dignum Sannemann
- Hystrichosphaeridium diktyoplokus Klumpp
- Hystrichosphaeridium diktyoplokus subsp. latum Klumpp
- Hystrichosphaeridium diploporum Eisenack
- Hystrichosphaeridium dispare Tasch
- Hystrichosphaeridium dissimilare Isagulova
- Hystrichosphaeridium divergens Eisenack
- Hystrichosphaeridium eccentrium Tasch
- Hystrichosphaeridium echinatum Menendez
- Hystrichosphaeridium echinoides Maier
- Hystrichosphaeridium ehrenbergii ('ehrenbergi') Deflandre
- Hystrichosphaeridium eisenackii ('eisenacki') Sannemann
- Hystrichosphaeridium eisenackianum Deunff
- Hystrichosphaeridium eisenackianum var. crozonensis Deun
- Hystrichosphaeridium ellipticum Cookson
- Hystrichosphaeridium entomium Tasch
- Hystrichosphaeridium eoinodes A. Eisenack
- Hystrichosphaeridium eoplanctonicum Eisenack
- Hystrichosphaeridium equispinosum Tasch
- Hystrichosphaeridium erectum Manum & Cookson
- Hystrichosphaeridium erraticum Eisenack
- Hystrichosphaeridium fabium Tasch
- Hystrichosphaeridium ferox Deflandre
- Hystrichosphaeridium floripes Deflandre & Cookson
- Hystrichosphaeridium floripes subsp. breviradiatum Cookson & Eisenack
- Hystrichosphaeridium flosculus Deflandre
- Hystrichosphaeridium fluctuans (Eisenack) A. Pastiels
- Hystrichosphaeridium follium Tasch
- Hystrichosphaeridium franconicum Sannemann
- Hystrichosphaeridium geometricum Deflandre
- Hystrichosphaeridium geometricum Pastiels
- Hystrichosphaeridium gotlandicum Eisenack
- Hystrichosphaeridium grallaeforme Brosius
- Hystrichosphaeridium heteracanthum Deflandre & Cookson
- Hystrichosphaeridium hillii ('hilli') (Merrill) Sarjeant
- Hystrichosphaeridium hippocrepicum Timofeev
- Hystrichosphaeridium hirsutoides Eisenack
- Hystrichosphaeridium hirsutoides var. hamatum Downie
- Hystrichosphaeridium hirsutum (Ehrenberg) Deflandre
- Hystrichosphaeridium hirtum subsp. amplum W. Wetzel
- Hystrichosphaeridium hirundo Eisenack
- Hystrichosphaeridium horridum Deflandre
- Hystrichosphaeridium huecospinasum Cramer
- Hystrichosphaeridium huguoniotii ('huguonioti') L. Valensi
- Hystrichosphaeridium inconspicuum Timofeev
- Hystrichosphaeridium inodes Klumpp
- Hystrichosphaeridium inodes ssp. gracilis Eisenack
- Hystrichosphaeridium integrum Sannemann
- Hystrichosphaeridium intermedium Eisenack
- Hystrichosphaeridium irregulare S. A. J. Pocock
- Hystrichosphaeridium irregulare (Merrill) Sarjeant
- Hystrichosphaeridium isocalamus Deflandre & Cookson
- Hystrichosphaeridium israelianum Rossignol
- Hystrichosphaeridium israelianum Rossignol
- Hystrichosphaeridium kiowanum Tasch
- Hystrichosphaeridium lacunosum Isagulova
- Hystrichosphaeridium lairdii Deflandre
- Hystrichosphaeridium langii ('langi') Wall
- Hystrichosphaeridium latirictum Davey & Williams
- Hystrichosphaeridium leonardianum Tasch
- Hystrichosphaeridium leptodermum Maier
- Hystrichosphaeridium lewisii ('lewisi') Deunff
- Hystrichosphaeridium lobospinosum Gocht
- Hystrichosphaeridium longispinosum Sannemann
- Hystrichosphaeridium longispinosum (Eisenack) Eisenack
- Hystrichosphaeridium longispinosum var. uncinatum Downie
- Hystrichosphaeridium longofilum Maier
- Hystrichosphaeridium lucidum Deunff
- Hystrichosphaeridium lychnea (Maier) Eisenack
- Hystrichosphaeridium machaerophorum Deflandre & Cookson
- Hystrichosphaeridium macrotubulum Neale & Sarjeant
- Hystrichosphaeridium magdalium Drugg
- Hystrichosphaeridium magnarmatum Tasch
- Hystrichosphaeridium mantellii ('mantelli') Davey & Williams
- Hystrichosphaeridium marsupium Tasch
- Hystrichosphaeridium maslovi Timofeev
- Hystrichosphaeridium meson Eisenack
- Hystrichosphaeridium microfurcatum Deunff
- Hystrichosphaeridium microspinosum Eisenack
- Hystrichosphaeridium microtriainum (`microtriaina') B. Klumpp
- Hystrichosphaeridium mineralosum Varma & Dangwal
- Hystrichosphaeridium mineralosum subsp. jekhowskyi Varma & Dangwal
- Hystrichosphaeridium mineralosum subsp. labiatum Varma & Dangwal
- Hystrichosphaeridium molodovense Timofeev
- Hystrichosphaeridium monacanthum Deunff
- Hystrichosphaeridium monstruosum Tasch
- Hystrichosphaeridium multicornutum Kimyai
- Hystrichosphaeridium multifurcatum Deflandre
- Hystrichosphaeridium multipilosum subsp. validum Sannemann
- Hystrichosphaeridium mutabile Sannemann
- Hystrichosphaeridium nudatum Timofeev
- Hystrichosphaeridium ohioense ('ohioensis') Winslow
- Hystrichosphaeridium oligacanthum W. Wetzel
- Hystrichosphaeridium oligacanthum subsp. complanatum W. Wetzel
- Hystrichosphaeridium oligacanthum subsp. granulatum W. Wetzel
- Hystrichosphaeridium oligacanthum subsp. stella W. Wetzel
- Hystrichosphaeridium oligacanthum subsp. velatum W. Wetzel
- Hystrichosphaeridium oligofurcatum Eisenack
- Hystrichosphaeridium ordovicum Timofeev
- Hystrichosphaeridium pachydermum Cookson & Eisenack
- Hystrichosphaeridium palmatum Deflandre & Courteville
- Hystrichosphaeridium paracostatum Cookson & Eisenack
- Hystrichosphaeridium paradoxum Brosius
- Hystrichosphaeridium parvispinum (Deflandre) Cookson & Eisenack
- Hystrichosphaeridium parvum Davey
- Hystrichosphaeridium pateum Timofeev
- Hystrichosphaeridium pattei Valensi
- Hystrichosphaeridium patulum Davey & Williams
- Hystrichosphaeridium paucifurcatum Cookson & Eisenack
- Hystrichosphaeridium penicillatum (Ehrenberg) Deflandre
- Hystrichosphaeridium perceptibile Isagulova
- Hystrichosphaeridium perforatum Gocht
- Hystrichosphaeridium perovatum Tasch
- Hystrichosphaeridium perplexum Varma & Dangwal
- Hystrichosphaeridium petilum Gitmez
- Hystrichosphaeridium pilosum (Ehrenberg) Deflandre
- Hystrichosphaeridium piriferum Eisenack
- Hystrichosphaeridium placacanthum Deflandre & Cookson
- Hystrichosphaeridium plicatum Maier
- Hystrichosphaeridium polonicum Gorka
- Hystrichosphaeridium polyplasium Maier
- Hystrichosphaeridium polytrichum Valensi
- Hystrichosphaeridium protellipticum Tasch
- Hystrichosphaeridium pseudhystrichodinium Deflandre
- Hystrichosphaeridium pseudhystrichodinium subsp. magnum W. Wetzel
- Hystrichosphaeridium pseudorecurvatum Morgenroth
- Hystrichosphaeridium pterophorum Deflandre & Courteville
- Hystrichosphaeridium pulcherrimum Deflandre & Cookson
- Hystrichosphaeridium pulcherrimum Deflandre & Cookson
- Hystrichosphaeridium pumile (O. Wetzel) Deflandre
- Hystrichosphaeridium quadridactylites Stockmans & Willière
- Hystrichosphaeridium quadriradiatum Timofeev
- Hystrichosphaeridium radiculatum Davey & Williams
- Hystrichosphaeridium ramuliferum Deflandre
- Hystrichosphaeridium ramusculosum Deflandre
- Hystrichosphaeridium ramusculosum var. macrocladum Deunff
- Hystrichosphaeridium raritanianum Kimyai
- Hystrichosphaeridium readei Davey & Williams
- Hystrichosphaeridium recurvatum (White) [Evitt]
- Hystrichosphaeridium recurvatum var. parvum Rozen
- Hystrichosphaeridium recurvatum var. polypes Cookson & Eisenack
- Hystrichosphaeridium rehdense Maier
- Hystrichosphaeridium reniforme Tasch
- Hystrichosphaeridium replexum Tasch
- Hystrichosphaeridium rhabdophorum Valensi
- Hystrichosphaeridium rhapalaphorum Valensi
- Hystrichosphaeridium rigens Timofeev
- Hystrichosphaeridium rjabinini Timofeev
- Hystrichosphaeridium robustum Sannemann
- Hystrichosphaeridium robustum subsp. fissum Sannemann
- Hystrichosphaeridium rubinum Rossignol
- Hystrichosphaeridium (Deflandre) Deflandre
- Hystrichosphaeridium saturnium Maier
- Hystrichosphaeridium scaffoldi Baksi
- Hystrichosphaeridium seminudum W. Wetzel
- Hystrichosphaeridium setigerfurcatum Timofeev
- Hystrichosphaeridium sexradiatum Timofeev
- Hystrichosphaeridium sheppeyense Davey & Williams
- Hystrichosphaeridium sibiricum Timofeev
- Hystrichosphaeridium sibiricum Timofeev
- Hystrichosphaeridium simplicispinum R.J. Davey & Williams
- Hystrichosphaeridium siphoniphorum Cookson & Eisenack
- Hystrichosphaeridium spiciferum Deunff
- Hystrichosphaeridium spinellosum Timofeev
- Hystrichosphaeridium spinescens Timofeev
- Hystrichosphaeridium spinipansatum (Merrill) Sarjeant
- Hystrichosphaeridium spiralisetum de Wit
- Hystrichosphaeridium staurasteroides Deflandre
- Hystrichosphaeridium stellaeforme Timofeev
- Hystrichosphaeridium stellatum Maier
- Hystrichosphaeridium stephanophorum Benedek
- Hystrichosphaeridium stimuliferum Deflandre
- Hystrichosphaeridium striatoconus Deflandre & Cookson
- Hystrichosphaeridium striatoconus Deflandre & Cookson
- Hystrichosphaeridium striolatum Deflandre
- Hystrichosphaeridium sylheti Baksi
- Hystrichosphaeridium tenuicapillatum (O. Wetzel) Deflandre
- Hystrichosphaeridium tiara Klumpp
- Hystrichosphaeridium torynum Cookson & Eisenack
- Hystrichosphaeridium tribrachiosum Tasch
- Hystrichosphaeridium tridactylites Valensi
- Hystrichosphaeridium trifurcatum subsp. consonum Sannemann
- Hystrichosphaeridium trifurcatum subsp. procerum Sannemann
- Hystrichosphaeridium triplicativum Timofeev
- Hystrichosphaeridium triradicosum Tasch
- Hystrichosphaeridium trisulcum Deunff
- Hystrichosphaeridium truncigerum Deflandre
- Hystrichosphaeridium tschunense Timofeev
- Hystrichosphaeridium tuberatum Downie
- Hystrichosphaeridium tuberosum Sannemann
- Hystrichosphaeridium tubiferum (Ehrenberg) Deflandre
- Hystrichosphaeridium tubiferum var. brevispinum Davey & Williams
- Hystrichosphaeridium unituberculatum Tasch
- Hystrichosphaeridium valgum Tasch
- Hystrichosphaeridium vasiformum Neale & Sarjeant
- Hystrichosphaeridium veliferum Downie
- Hystrichosphaeridium vemustum Sannemann
- Hystrichosphaeridium vestitum Deflandre
- Hystrichosphaeridium whitei Delflandre & Courteville
- Hystrichosphaeridium williereae F. Martin
- Hystrichosphaeridium wimanii ('wimani') Eisenack
- Hystrichosphaeridium xanthopyxides ('xanthiopyxides') (O. Wetzel) Deflandre
- Hystrichosphaeridium xanthopyxides var. granulosum Deflandre
- Hystrichosphaeridium xanthopyxides var. parvispinum Deflandre
- Hystrichosphaeridium xipheum (Maier) Eisenack
- Hystrichosphaeridium xipheum (Maier) Sarjeant
- Hystrichosphaeridium zoharyi Rossignol
- Hystrichosphaeridium zonale Timofeev
- HYSTRICHOSPHAERINA G. Alberti
- Hystrichosphaerina orbifera (Klement) Stover & Evitt
- Hystrichosphaerina schindewolfii ('schindewolfi') Alberti
- Hystrichosphaerina turonica Alberti
- HYSTRICHOSPHAEROPSIS Deflandre
- HYSTRICHOSPHAEROPSIS (Deflandre) Deflandre {subgenus of Hystrichosphaera}
- Hystrichosphaeropsis complanata Eisenack
- Hystrichosphaeropsis downiei (Pocock) Stover & Evitt
- Hystrichosphaeropsis obscurum Habib
- Hystrichosphaeropsis ovum Deflandre
- HYSTRICHOSTROGYLON J. Agelopoulos
- Hystrichostrogylon membraniphorum Agelopoulos
- IALOMITZIA L. Gruia
- Ialomitzia cavernicola Gruia
- ICHNOPHYCUS J. Hall
- Ichnophycus tridactylus J. Hall
- ICHTHYOBODO C. Pinto
- Ichthyobodo necatrix (Henneguy) Pinto
- ICHTHYOCERCUS W. West & G.S. West
- Ichthyocercus angolensis W. West & G.S. West
- Ichthyocercus angolensis var. longispinus Borge
- Ichthyocercus australiensis Playfair
- Ichthyocercus bourrellyi Tell
- Ichthyocercus cronbergii Bourrelly
- Ichthyocercus humbertii Bourrelly
- Ichthyocercus longispinus (Borge) Playfair
- Ichthyocercus sierra-leonensis Woodhead & Tweed
- ICHTHYODINIUM A. Hollande & J. Cachon
- Ichthyodinium chabelardii ('chabelardi') Hollande & J. Cachon
- ICHTHYODONTUM Scott & G.W. Prescott
- Ichthyodontum sachlanii Scott & Prescott
- Ichthyodontum sachlanii var. parorthium Scott & Prescott
- ICONELLA A. Jurilj
- Iconella variabilis Jurilj CAS
- IDIONYMPHA L.R. Cleveland, Hall, E.P. Sanders & Collier
- Idionympha perissa L.R. Cleveland, Hall, E.P. Sanders & Collier
- IGNATIUS H.C. Bold & F.J. MacEntee
- Ignatius tetrasporus H.C. Bold & F.J. MacEntee
- IKEBEA S. Komura
- Ikebea amphistriata Komura CAS
- Ikebea bifurcata Komura CAS
- Ikebea clavata Komura CAS
- Ikebea coronata Komura CAS
- Ikebea robusta Komura CAS
- Ikebea tenuis (J. Brun) Akiba CAS
- IKONELLA A. Jurilj
- ILAEA Dumortier {nomen}
- ILEA E.M. Fries
- ILEA (Fries) Duby {section of ULVA}
- ILEA J. Agardh
- ILEA (J. Agardh) Wille {section of Enteromorpha}
- Ilea bertolonii (C. Agardh) Meneghini
- Ilea bertolonii (C. Agardh) Zanardini
- Ilea caespitosa (J. Agardh) Nordstedt
- Ilea clathrata (Roth) Gaillon
- Ilea clathrata [var.] uncinata (Lyngbye) De Notaris
- Ilea compressa (L.) Gaillon
- Ilea compressa var. crinita Zanardini {nomen}
- Ilea fascia (O.F. Müller) E.M. Fries
- Ilea fascia f. caespitosa (J. Agardh) Setchell & Gardner
- Ilea fascia f. debilis (Kützing) Setchell & Gardner
- Ilea fascia f. filiformis (Batters) Setchell & Gardner
- Ilea fascia f. typica Kjellman {nomen}
- Ilea fascia f. zosterifolia (Reinke) Setchell & Gardner
- Ilea filiformis (Batters) Nordstedt
- Ilea fistulosa (Hudson) Gaillon
- Ilea foeniculacea (Hudson) Fries
- Ilea fulvescens (C.A. Agardh) J.G. Agardh
- Ilea intestinalis (L.) Leiblein
- Ilea tenuissima (J. Agardh) Nordstedt
- Ilea torta (Mertens) [Trevisan]
- Ilea zostericola Noda
- Ilea zostericola Noda
- Ilea zosterifolia (Reinke) Nordstedt
- ILSELITHINA H. Stradner
- Ilselithina fusa P. H. Roth
- ILSTERIA H.L. Skuja & A.A. Pascher
- ILSTERIA Skuja & Pascher
- Ilsteria eradians Pascher
- Ilsteria lobata Pascher
- Ilsteria quadrijuncta Skuja
- Ilsteria quadrijuncta Skuja
- Ilsteria tetracoccus Pascher
- IMANTONIA N. Reynolds
- Imantonia rotunda N. Reynolds
- IMBATODINIUM T.F. Vozzhennikova
- Imbatodinium antennatum Gitmez & Sarjeant
- Imbatodinium fractum N.C. Mehrotra & W.A.S. Sarjeant
- Imbatodinium imbatodinensis T.F. Vozzhennikova
- Imbatodinium kondratjevi Vozzhennikova
- Imbatodinium pomum (R.J. Davey) N.C. Mehrotra & W.A.S. Sarjeant
- Imbatodinium radiculatum (R.J. Davey) N.C. Mehrotra & W.A.S. Sarjeant
- Imbatodinium verrucosum Vozzhennikova
- Imbatodinium villosum Vozzhennikova
- IMPAGIDINIUM L.E. Stover & W.R. Evitt
- Impagidinium alectrolophum (Sarjeant) Stover & Evitt
- Impagidinium dispertitum (Cookson & Eisenack) Stover & Evitt
- Impagidinium elegans (Cookson & Eisenack) Stover & Evitt
- Impagidinium maculatum (Cookson & Eisenack) Stover & Evitt
- Impagidinium pacificum J.P. Bujak
- Impagidinium pallidum J.P. Bujak
- Impagidinium paradoxum (Wall) Stover & Evitt
- Impagidinium patulum (Wall) Stover & Evitt
- Impagidinium simplicium (Cookson & Eisenack) Stover & Evitt
- Impagidinium strialatum (Wall) Stover & Evitt
- Impagidinium striatum (Clarke & Verdier) Stover & Evitt
- Impagidinium velorum J.P. Bujak
- Impagidinium victorianum (Cookson & Eisenack) Stover & Evitt
- Impagidinium whitei (Sarjeant) Stover & Evitt
- IMPERIASTER E. Martini
- Imperiaster obscurus (Martini) Martini
- IMPERIELLA G.F. Elliott & P. Süssli
- Imperiella iranica G. F. Elliott & Süssli
- IMPLETOSPHAERIDIUM P. Morgenroth
- Impletosphaeridium capillaceum Morgenroth
- Impletosphaeridium cracens Eaton
- Impletosphaeridium densicomatum (Maier) Morgenroth
- Impletosphaeridium erinaceum Morgenroth
- Impletosphaeridium hirsutum (Ehrenberg) Morgenroth
- Impletosphaeridium implicatum Morgenroth
- Impletosphaeridium insolitum Eaton
- Impletosphaeridium kroemmelbeinii ('krömmelbeini') Morgenroth
- Impletosphaeridium labyrinthus Morgenroth
- Impletosphaeridium luxurium Eaton
- Impletosphaeridium multispinosum Benedek
- Impletosphaeridium panniforme (Gerlach) Morgenroth
- Impletosphaeridium placacanthum (Deflandre & Cookson) Morgenroth
- Impletosphaeridium pycnospinosum Benedek
- Impletosphaeridium rugosum Morgenroth
- Impletosphaeridium transfodum Morgenroth
- Impletosphaeridium whitei (Deflandre & Courteville) Morgenroth
- IMPLICARIA F. Heydrich
- Implicaria reticulata Heydrich
- IMPLUVICULUS A.R. Loeblich, Jr. & H. Tappan
- Impluviculus campidanus P. Pittau
- Impluviculus milonii (Deunff) A.R. Loeblich, Jr. & H. Tappan
- INACTIS F.T. Kützing
- INACTIS (Kützing) Gomont {subgenus}
- INACTIS G.A. Thuret ex M.A. Gomont {subgenus of Schizothrix}
- INACTIS ([Kützing ex Gomont]) Kirchner
- INACTIS [Geitler] {section of Schizothrix}
- Inactis austinii Wolle
- Inactis austinii ('austini') Wolle ex Forti
- Inactis corsicana Kützing
- Inactis cresswellii (Harvey) Thuret
- Inactis cresswellii (Gomont) Forti
- Inactis crustacea Kützing
- Inactis ecalcarea Gardner
- Inactis fasciculata (Naegeli) Grunow ex Rabenhorst
- Inactis fasciculata (Gomont ex Gomont) Kirchner
- Inactis fasciculata f. virescens Grunow ex Rabenhorst
- Inactis fasciculata f. virescens Grunow ex Forti
- Inactis funalis (W. West & G.S. West) Forti
- Inactis hawaiensis (Lemmermann) Forti
- Inactis heterotricha (Kützing) Kirchner
- Inactis homoeotricha (Kützing) Kirchner
- Inactis italica Kützing
- Inactis kuetzingii ('kützingii') Rabenhorst
- Inactis kuetzingii var. crustacea ( Kützing) Rabenhorst
- Inactis kuetzingii var. pulvinata (Kützing) Rabenhorst
- Inactis kuetzingii var. tornata (Kützing) Rabenhorst
- Inactis kuetzingii var. vaginata (Naegeli) Rabenhorst
- Inactis lacustris var. caespitosa (Gomont) Forti
- Inactis mexicana (Gomont) Forti
- Inactis obscura G. Dickie
- Inactis penicillata (Kützing) Kirchner
- Inactis penicillata (Gomont) Kirchner
- Inactis polythrix (Hansgirg) Forti
- Inactis polythrix Forti
- Inactis pulvinata (Kützing) Kützing
- Inactis pulvinata (Gomont) Kirchner
- Inactis rivularioides Forti
- Inactis rubella (Gomont) Forti
- Inactis sauteriana Grunow ex Rabenhorst
- Inactis sauteriana Grunow ex Forti
- Inactis scapulorum (Kützing) Thuret
- Inactis septentrionalis (Gomont) Forti
- Inactis simmonsiae (Collins) Forti
- Inactis tinctoria (C. Agardh) Thuret
- Inactis tinctoria (Gomont ex Gomont) Kirchner
- Inactis tornata Kützing
- Inactis tornata var. pulvinata Kützing
- Inactis vaginata Naegeli
- Inactis vaginata (Gomont) Forti
- INCISORIA M. Hajós
- Incisoria inordinata Hajós CAS
- Incisoria lanceolata Hajós & Stradner
- Incisoria punctata Hajós & Stradner
- INDOPHYTON Mathur
- INDOPOLIA J. Pia
- Indopolia feddeni Has & Vimal
- Indopolia satyavantii ('satyavanti') Pia
- INDUMENTHALITHUS V.N. Vekshina
- Indumenthalithus tetracellus-eleganticus ('tetracellus eleganticus') (Shamrai & Lazareva) Vekshina
- INEFFIGIATA W. West & G.S. West
- Ineffigiata neglecta W. West & G.S. West
- INGENHOUZELLA F.B. Gaillon {nomen}
- Ingenhouzella flacca (Dillwyn) Gaillon
- Ingenhouzella fugacissima (Roth) Gaillon
- Ingenhouzella zonata (Weber & Mohr) Gaillon
- INOCARDION B.A. Masters & Scott
- INOCAULIS J. Hall {info}
- Inocaulis anastomotica Ringueberg
- Inocaulis arbuscula S. A. Miller
- Inocaulis kirkii ('kirki') Ruedemann
- INOCHORION F.T. Kützing
- Inochorion cervicorne Kützing
- Inochorion dichotomum Kützing
- Inochorion multifidum Meneghini
- INOCONIA M.-A. Libert
- INOCONIA M.-A. Libert
- Inaconia michelii ('micheli') Libert
- Inoconia michelii Libert
- INODERMA F.T. Kützing
- INODERMA F.T. Kützing
- Inoderma lamellosum var. fontanum (Kützing) Rabenhorst CAS
- Inoderma lamellosum Kützing
- Inoderma lamellosum Kützing CAS
- Inoderma fontanum Kützing CAS
- INOMERIA F.T. Kützing
- Inomeria brebissoniana Kützing
- Inomeria fusca Kützing
- Inomeria granulosa Naegeli ex Kützing
- Inomeria roemeriana Kützing
- Inomeria umbilicata Naegeli ex Kützing
- INOPINATELLA G.F. Elliott
- Inopinatella lawsonii G.F. Elliott
- INSILELLA C.G. Ehrenberg
- Insilella africana C. G. Ehrenberg
- Insilella amphicentra C. G. Ehrenberg
- Insilella tenuis C. G. Ehrenberg
- Insilella turgida C. G. Ehrenberg
- Insilella turgida var. aspera C. G. Ehrenberg
- Insilella turgida var. laevis C. G. Ehrenberg
- Insilella verticillata C. G. Ehrenberg
- INTERFILUM Chodat
- Interfilum paradoxum Chodat & Topali
- Interfilum paradoxum var. reticulatum Fritsch & John
- INTERMURELLA G.F. Elliott
- Intermurella scotica G. F. Elliott
- INTERNORETIA W.A. Setchell & N.L. Gardner
- Internoretia fryeana W.A. Setchell & N.L. Gardner
- Interpositus sertiformis E.I. Gorgulevskaya
- INTERTHAMNION Gordon
- Interthamnion attenuatum Gordon
- INTEXTULELLA A.A. Petryk
- Intextulella agglomerata Petryk
- INTORTUM S. Kumano {subsection of Batrachospermum}
- INVERTOCYSTA L.E. Edwards
- Invertocysta lacrymosa L.E. Edwards
- Invertocysta tabulata L.E. Edwards
- INVOLUCRANA R.N. Baldock & H.B.S. Womersley
- Involucrana crassa (Hooker & Harvey) Gordon
- Involucrana meredithiana (J. Agardh) Baldock & Womersley
- INZERIA Krylov
- Inzeria conjuncta Preiss {form, not species}
- Inzeria multiplex Preiss {form (not species)}
- IREKSOKONIA K. Meier
- Ireksokonia formosa K. Meier
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