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True branching and phenotypic plasticity in the planktonic cyanobacterium Dolichospermum brachiatum sp. nov. (Nostocales, Aphanizomenonaceae), from south-eastern Australia

GLENN B. MCGREGOR , BARBARA C. SENDALL
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A new genus and species in the Sporolithales (Corallinophycidae, Rhodophyta) from northern New Zealand: Roseapetra farriae sp. nov. 
WENDY A. NELSON , KATE F. NEILL , BRENTON A. TWIST , JUDY E. SUTHERLAND
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Erratum: Zhang, Y., Liao, M., Li., Y.-L., Chang, F.-Q. & Kociolek., J.P. (2021) Cymbella xiaojinensis sp. nov., a new cymbelloid diatom species (Bacillariophyceae) from high altitude lakes, China. Phytotaxa 482 (1): 55–64.
YUN ZHANG , MENGNA LIAO , YAN-LING LI , FENG-QIN CHANG , JOHN PATRICK KOCIOLEK
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Open Access
A new species of Epithemia Kützing (Bacillariophyceae, Rhopalodiales) from the Mula river, Western Ghats, India, with comments on the phylogenetic position of Rhopalodia and Epithemia
ANBUKKARASU VIGNESHWARAN , YAN LIU , JOHN PATRICK KOCIOLEK , BALASUBRAMANIAN KARTHICK
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Planothidium marganaiensis sp. nov. (Bacillariophyta), a new cavum-bearing species from a karst spring in south-western Sardinia (Italy) 
GIUSEPPINA G. LAI , LUC ECTOR , BACHISIO M. PADEDDA , CARLOS E. WETZEL
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Genetic investigation of three type specimens of Osmundea (Rhodomelaceae, Rhodophyta) from the Gulf of California, Mexico and California, USA
JEFFERY R. HUGHEY , KATHY ANN MILLER
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Ramos, G.J.P., Santos, M.A. & Moura, C.W.N. (2021) Taxonomic notes on some Cosmarium species (Desmidiaceae, Zygnematophyceae) from Brazil. Phytotaxa 483 (3): 291–299.
GERALDO JOSÉ PEIXOTO RAMOS , MARIA APARECIDA DOS SANTOS , CARLOS WALLACE DO NASCIMENTO MOURA
PDF (199KB)
Open Access
A guide to the identification of diaspores of the main macrophytes in the Pantanal
GISELE CATIAN , GABRIEL TIRINTAN DE LIMA , VITORIA SILVA FABIANO , VINÍCIUS MANVAILER GONÇALVES , EDNA SCREMIN-DIAS
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Description of two new Cymbella (Bacillariophyta) species from Sakarbaşı spring, Turkey
CÜNEYT NADIR SOLAK , NESLIHAN BALKIS-OZDELICE , ELIF YILMAZ , TURGAY DURMUS , SAÚL BLANCO
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Cocconeis tsara sp. nov., C. santandrea sp. nov. and allied taxa pertaining to the new section Loculatae
CATHERINE RIAUX-GOBIN , THOMAS FRANKOVICH , ANDRZEJ WITKOWSKI , PABLO SAENZ-AGUDELO , PETER ESTEVE , LUC ECTOR , JOHN BEMIASA
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