radians W.B.Turner Micrasterias radiosa Ralfs Micrasterias ralfsii (Brébisson ex Ralfs) Škaloud et al. Micrasterias rotata Ralfs Micrasterias sanctipaulensis C.E.M.Bicudo & L.Sormus Micrasterias schmidleana Coesel & Van Geest Micrasterias schweickerdtii M.I.Claassen Micrasterias schweinfurthii Cohn Micrasterias semiradiata Brébisson ex Kützing Micrasterias sexpinata (Irénée-Marie & Hilliard) H.Croasdale & G.W.Prescott Micrasterias simplex Børgesen Micrasterias spinosa H.S.Kim Micrasterias stauromorpha W.B.Turner Micrasterias subaequalis Grönblad Micrasterias subdenticulata (Nordstedt) Willi Krieger Micrasterias subincisa Willi Krieger Micrasterias suboblonga Nordstedt Micrasterias subtruncata A.I.Lobik Micrasterias tetraptera West & G.S.West Micrasterias thomasiana W.Archer Micrasterias torreyi Bailey Micrasterias triangularis Wolle Micrasterias tropica Nordstedt Micrasterias truncata Brébisson ex Ralfs Micrasterias verrucosa Bisset Micrasterias zeylanica F.E.Fritsch Species names with uncertain taxonomic status The status of the following species is unresolved: Micrasterias aculeata M.Rostock Micrasterias berganii H.V.Hauge Micrasterias bicaudata (A.K.H.Braun ex Kützing) Kuntze Micrasterias bioctonaria G.Rabenhorst Micrasterias boryana (P.J.F.Turpin) Ehrenberg Micrasterias boryi Kützing Micrasterias braunii (C.W.Nägeli ex Kützing) Kuntze Micrasterias comperei R.S.Ganem & P.A.C.Senna Micrasterias complecta C.G.T.Preuss Micrasterias convoluta (A.K.J.Corda) Kuntze Micrasterias cordae A.Braun Micrasterias coronula Ehrenberg Micrasterias cruciata Kützing Micrasterias crucigenia Kützing Micrasterias decemdentatum (C.W.Nägeli) W.Archer Micrasterias denticula Istvanfy Micrasterias duplex (Meyen) Kützing Micrasterias ecornis Ehrenberg Micrasterias eichleri Schmidle Micrasterias enneactis Ehrenberg Micrasterias extendens W.B.Turner Micrasterias falcata Corda Micrasterias floridensis R.K.Salisbury Micrasterias galeata Borge Micrasterias ghibellina Meneghini Micrasterias granulata H.C.Wood Micrasterias halis Raciborski Micrasterias hamata (Wolle) F.C.E.Børgesen Micrasterias heliactis Kützing Micrasterias heptactis Ehrenberg Micrasterias hermanniana Reinsch Micrasterias hexactis Ehrenberg Micrasterias hexagona G.W.Grant Micrasterias hexagonalis F.Steinecke Micrasterias kangofurinensis N.Woodhead & R.D.Tweed Micrasterias lacerata Kützing Micrasterias margaritifera (P.J.F.Turpin) L.A.Brébisson & P.Godet Micrasterias mbugensis E.M.Lind Micrasterias melitensis G.G.A.Meneghini Micrasterias mohii (Borge) Authority Unknown Micrasterias multifida Wolle Micrasterias napoleonis (P.J.F.Turpin) Kützing Micrasterias nordstetiana Wolle Micrasterias oblonga Ehrenberg Micrasterias ornamentalis O.Borge Micrasterias paradoxa Kützing Micrasterias platyptera W.B.Turner Micrasterias polonica (B.Eichler & R.Gutwinski) West & G.S.West Micrasterias polycyclia G.Rabenhorst Micrasterias pseudofurcata Wolle Micrasterias quadragies-cuspidata (Corda) Ralfs Micrasterias renicarpa (Turpin) Kützing Micrasterias ricciaeformis C.Agardh Micrasterias robusta West & G.S.West Micrasterias rosula Kützing Micrasterias selenaea Kützing Micrasterias senaria Ehrenberg Micrasterias simplex (Meyen) Kützing Micrasterias simplex Wolle Micrasterias simplex Kurt Förster & F.Eckert Micrasterias sinuata L.A.Brébisson Micrasterias siolii A.M.Scott & Croasdale Micrasterias sphaerastrum Kützing Micrasterias staurastrum Kützing Micrasterias subfimbriata Wolle Micrasterias sublagoensis Kurt Förster & F.Eckert Micrasterias tetracera Kützing Micrasterias tricera Kützing Micrasterias tricyclia Ehrenberg Micrasterias trigemina E.H.P.A.Haeckel Micrasterias upsaliensis (Cleve) W.Archer Phylogenetics Modern molecular phylogenetics suggest the following relationships (not all accepted species are included): Even though Triploceras was recovered as embedded within Micrasterias, there was low statistical support for this placement, so