Cosmarium abbreviatum
      Cosmarium abruptum
      Cosmarium abruptum var. granulatum
      Cosmarium achondroides
      Cosmarium affine
      Cosmarium affine var. excavatum
      Cosmarium amoenum
      Cosmarium amoenum var. intumescens
      Cosmarium amoenum var. mediolaeve
      Cosmarium amplum
      Cosmarium anceps
      Cosmarium angulatum
      Cosmarium angulatum f. major
      Cosmarium angulosum
      Cosmarium angulosum var. concinnum
      Cosmarium angustatum
      Cosmarium askenasyi
      Cosmarium askenasyi f. latum
      Cosmarium australiense
      Cosmarium binerve
      Cosmarium binum
      Cosmarium binum var. australiensis
      Cosmarium bioculatum
      Cosmarium bioculatum var. hians
      Cosmarium bipunctatum
      Cosmarium bireme
      Cosmarium biretiforme
      Cosmarium biretum
      Cosmarium bisphaericum
      Cosmarium blyttii
      Cosmarium blyttii f. australica
      Cosmarium blyttii var. blyttii
      Cosmarium blyttii var. quaternigranulatum
      Cosmarium botrytis
      Cosmarium botrytis var. tumidum
      Cosmarium brebissonii
      Cosmarium broomei
      Cosmarium burkillii
      Cosmarium burkillii var. depressum
      Cosmarium callosissimum
      Cosmarium callosissimum var. callosissimum
      Cosmarium candianum
      Cosmarium capitulum
      Cosmarium capitulum var. australe
      Cosmarium centiculatum
      Cosmarium ceylanicum f. minus
      Cosmarium clepsydra
      Cosmarium connatum
      Cosmarium connatum f. 1 sensu Thomasson 1986
      Cosmarium connatum f. 2 sensu Thomasson 1986
      Cosmarium connatum f. 3 sensu Thomasson 1986
      Cosmarium conspersum
      Cosmarium conspersum f. latum
      Cosmarium conspersum var. latum
      Cosmarium conspersum var. scottii
      Cosmarium constrictum
      Cosmarium constrictum f. minor
      Cosmarium contractiforme
      Cosmarium contractum
      Cosmarium contractum f. ellipticum
      Cosmarium contractum f. indentatum
      Cosmarium contractum var. ellipsoideum
      Cosmarium contractum var. incrassatum
      Cosmarium contractum var. indentatum
      Cosmarium contractum var. minutum
      Cosmarium contractum var. pachydermum
      Cosmarium contractum var. rotundatum
      Cosmarium crenatum
      Cosmarium crenulatum
      Cosmarium creperum
      Cosmarium cucumis
      Cosmarium cucumis var. magnum
      Cosmarium cylindricoideum
      Cosmarium cylindricum
      Cosmarium cymatonotophorum
      Cosmarium cymatonotophorum var. cymatonotophorum
      Cosmarium cymatopleurum
      Cosmarium cymatopleurum f. minus
      Cosmarium cymatopleurum var. cymatopleurum
      Cosmarium debaryi
      Cosmarium decemcrenatum
      Cosmarium decoratum
      Cosmarium denticulatum
      Cosmarium dentiferum
      Cosmarium depressum
      Cosmarium depressum f. minutum
      Cosmarium depressum var. achondrum
      Cosmarium depressum var. depressum
      Cosmarium depressum var. elevatum
      Cosmarium depressum var. mediopunctatum
      Cosmarium depressum var. planctonicum
      Cosmarium dichotomum
      Cosmarium difficile
      Cosmarium difficile f. laeve
      Cosmarium difficile var. sublaeve
      Cosmarium doidgei
      Cosmarium dorsitruncatum
      Cosmarium dorsitruncatum var. pseudoscenedesmus
      Cosmarium dubium
      Cosmarium elegantissimum
      Cosmarium exasperatum
      Cosmarium exasperatum var. spinatum
      Cosmarium excavatum
      Cosmarium exiguum var. dilatatum
      Cosmarium favum
      Cosmarium galeritum
      Cosmarium gayanum
      Cosmarium geminatum
      Cosmarium geminatum f. ornatum
      Cosmarium glyptodermum
      Cosmarium glyptodermum var. tuberculatum
      Cosmarium gonoides
      Cosmarium gonoides var. subturgidum
      Cosmarium granatoides
      Cosmarium granatum
      Cosmarium granatum f. scrobiculatum
      Cosmarium granatum var. gibbosum
      Cosmarium granatum var. pyramidal
      Cosmarium hammeri
      Cosmarium hammeri f. queenslandica
      Cosmarium hardyi
      Cosmarium humile var. humile
      Cosmarium impressulum
      Cosmarium impressulum f. suborthogonum
      Cosmarium impressulum var. suborthogonum
      Cosmarium inconspicuum
      Cosmarium isthmium
      Cosmarium javanicum
      Cosmarium javanicum f. 1 sensu Thomasson 1986
      Cosmarium joadjense
      Cosmarium laeve
      Cosmarium laeve var. laeve
      Cosmarium latrifrons
      Cosmarium lineogranulosum
      Cosmarium logiense
      Cosmarium lundellii
      Cosmarium lundellii var. corruptum
      Cosmarium lundellii var. ellipticum
      Cosmarium mansangense
      Cosmarium margaritatum
      Cosmarium margaritatum f. pyramidatum
      Cosmarium margaritatum var. quadrum
      Cosmarium margaritiferum
      Cosmarium margaritiferum f. regularius
      Cosmarium medioscrobiculatum
      Cosmarium meneghinii
      Cosmarium meneghinii f. meneghinii
      Cosmarium meneghinii f. octangularis
      Cosmarium meneghinii var. meneghinii
      Cosmarium minimum
      Cosmarium moniliforme
      Cosmarium moniliforme f. ellipticum
      Cosmarium moniliforme var. elongatum
      Cosmarium moniliforme var. indentatum
      Cosmarium moniliforme var. moniliforme
      Cosmarium moniliforme var. pulcherrimum
      Cosmarium moniliforme var. subpyriforme
      Cosmarium moniliforme var. subquadratum
      Cosmarium multigranulatum
      Cosmarium multiordinatum
      Cosmarium multiordinatum var. burmense
      Cosmarium multituberculatum
      Cosmarium murrayi
      Cosmarium naegelianum
      Cosmarium neapolitanum
      Cosmarium neapolitanum var. australicum
      Cosmarium nitidulum
      Cosmarium norimbergense
      Cosmarium norimbergense var. depressa
      Cosmarium nudum
      Cosmarium obsoletum
      Cosmarium obsoletum f. major
      Cosmarium obsoletum var. obsoletum
      Cosmarium obsoletum var. punctatum
      Cosmarium obsoletum var. sitvense
      Cosmarium obtusatum
      Cosmarium oenpelliense
      Cosmarium ophelii
      Cosmarium orbiculatum
      Cosmarium ordinatum
      Cosmarium orthostichum
      Cosmarium otus
      Cosmarium pachydermum
      Cosmarium pachydermum f. parvum
      Cosmarium pachydermum f. transitoria
      Cosmarium pachydermum var. aethiopicum
      Cosmarium pachydermum var. pachydermum
      Cosmarium palustre
      Cosmarium palustre var. circulare
      Cosmarium palustre var. ovale
      Cosmarium panduriforme
      Cosmarium papilliferum
      Cosmarium pardalis
      Cosmarium paucigranulatum
      Cosmarium perfissum
      Cosmarium perforatum
      Cosmarium perigranulatum
      Cosmarium perminutum var. australe
      Cosmarium phaseolus
      Cosmarium phaseolus var. elevatum
      Cosmarium pokornyanum
      Cosmarium porosum
      Cosmarium porrectum
      Cosmarium portianum
      Cosmarium praemorsum
      Cosmarium protomphalum
      Cosmarium protomphalum var. angulare
      Cosmarium pseudoamoenum
      Cosmarium pseudoamoenum var. inornatum
      Cosmarium pseudoarmatum
      Cosmarium pseudobroomei
      Cosmarium pseudoconnatum
      Cosmarium pseudophaseolus
      Cosmarium pseudophaseolus var. tithophoroides
      Cosmarium pseudoprotuberans
      Cosmarium pseudoprotuberans var. angustius
      Cosmarium pseudopyramidatum
      Cosmarium pseudopyramidatum f. minor
      Cosmarium pseudoquadratulum
      Cosmarium pseudoretusum
      Cosmarium pseudoretusum var. africanum
      Cosmarium pseudospeciosum
      Cosmarium punctulatum
      Cosmarium punctulatum f. typica
      Cosmarium punctulatum var. seriatum
      Cosmarium punctulatum var. subpunctulatum
      Cosmarium pygmaeum
      Cosmarium pyramidatum
      Cosmarium pyramidatum var. stenonotum
      Cosmarium pyriforme
      Cosmarium pyriforme f. reductum
      Cosmarium quadratulum
      Cosmarium quadratum var. willei
      Cosmarium quadricrenum
      Cosmarium quadrifarium
      Cosmarium quadrifarium f. trifidum
      Cosmarium quadrifarium var. hexastichum
      Cosmarium quadrifarium var. octastichum
      Cosmarium quadrifarium var. quadrifarium
      Cosmarium quadriverrucosum var. supraornatum
      Cosmarium quadrum
      Cosmarium quadrum var. minus
      Cosmarium raciborskii
      Cosmarium ralfsii
      Cosmarium rectangulare
      Cosmarium rectangulare f. granulatum
      Cosmarium rectangulare f. multigranulatum
      Cosmarium rectangulare var. angustius
      Cosmarium rectangulare var. hexagonum
      Cosmarium regnellii
      Cosmarium regnellii var. minimum
      Cosmarium regnesi
      Cosmarium regnesi var. productum
      Cosmarium reinschii
      Cosmarium reniforme
      Cosmarium reniforme var. compressum
      Cosmarium reniforme var. elevatum
      Cosmarium retusiforme
      Cosmarium retusiforme var. major
      Cosmarium securiforme
      Cosmarium seelyanum
      Cosmarium sexangulare
      Cosmarium sexangulare var. minus
      Cosmarium sp. 1 sensu Borrelli 1984
      Cosmarium sp. 2 sensu Borelli 1984
      Cosmarium sp. 3 sensu H.U. Ling & P.A. Tyler 1986
      Cosmarium sp. 4 sensu H.U. Ling & P.A. Tyler 1986
      Cosmarium spechtii
      Cosmarium speciosum var. speciosum
      Cosmarium sphalerostichum
      Cosmarium spinoscrobiculosum
      Cosmarium spinuliferum
      Cosmarium striolatum
      Cosmarium striolatum var. nordstedtii
      Cosmarium subcapitulum
      Cosmarium subcapitulum f. minus
      Cosmarium subcostatum
      Cosmarium subcostatum f. biturberculatum
      Cosmarium subcostatum f. minor
      Cosmarium subcrenatum
      Cosmarium subgranatum
      Cosmarium subspeciosum
      Cosmarium subspeciosum var. simplex
      Cosmarium subspeciosum var. subspeciosum
      Cosmarium subspeciosum var. validius
      Cosmarium subtriordinatum
      Cosmarium subtriordinatum var. rotundatum
      Cosmarium subtumidum
      Cosmarium subtumidum var. pachydermum
      Cosmarium subturgidum
      Cosmarium subundulatum
      Cosmarium sulcatum var. glabrum
      Cosmarium taxichondrum
      Cosmarium taxichondrum var. undulatum
      Cosmarium tetragonum
      Cosmarium tetraophthalmum
      Cosmarium tinctum
      Cosmarium tinctum var. tinctum
      Cosmarium tjibenongense
      Cosmarium tjibenongense f. minor
      Cosmarium tortum f. trigona
      Cosmarium trachypleurum
      Cosmarium trachypleurum var. minus
      Cosmarium trachypleurum var. spinosum
      Cosmarium trachypleurum var. subglabrum
      Cosmarium trilobulatum
      Cosmarium trilobulatum var. depressum
      Cosmarium truncatellum
      Cosmarium tumidum
      Cosmarium undulatum
      Cosmarium venustum f. latum
      Cosmarium venustum f. minus
      Cosmarium venustum var. borgei
      Cosmarium venustum var. excavatum
      Cosmarium venustum var. hypohexagonum
      Cosmarium venustum var. induratum
      Cosmarium venustum var. minus
      Cosmarium williamsonii
      Cosmarium zonatum
      Cosmarium zonatum var. subcirculare

* denotes an introduced species; † denotes both native and introduced; + denotes a threatened species.
     ">" indicates that infraspecific taxa are recognised within a species

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