Tetraedron caudatum species doubtful

Tetraedron bifurcatum species accepted

Tetraëdron verrucosum G.M.Sm. species heterotypic synonym

Tetraëdron trigonum (Nägeli) Hansg. species accepted

Tetraëdron trigonum var. gracile (Reinsch) De Toni variety homotypic synonym

Tetraedron constrictum G.M.Smith species accepted

Tetraedron muticum (A.Braun) Hansgirg species accepted

Tetraëdron caudatum (Corda) Hansg. species accepted

Polyedrium pentagonum Reinsch species synonym

Polyedrium caudatum Corda species synonym

Astericium caudatum Corda species synonym

Tetraedron quadratum (Reinsch) Hansgrig species accepted

Polyedrium minimum A.Braun species synonym

Tetraedron platyisthmum (W.Archer) G.S.West species synonym

Tetraëdron tumidulum (Reinsch) Hansg. species accepted

Tetraëdron gracile (Reinsch) Hansg. species accepted

Tetraedron regulare species accepted

Polyedrium tumidulum Reinsch species synonym

Tetraedron enorme species accepted

Tetraëdriella verrucosa (G.M.Smith) Krienitz & Heynig species accepted

Tetraëdron triangulare Korshikov species accepted

Tetraedron trigonum subsp. gracile (Reinsch) De Toni subspecies homotypic synonym

Tetraedron hemisphaericum Skuja species accepted

Tetraedron staurogeniaeforme Lemmermann species accepted

Tetraedron elegans Playhair species accepted

Closteridium lunula Reinsch species homotypic synonym

Pseudostaurastrum limneticum (Borge) Guiry species accepted

Asterothrix longispina (Perty) Printz species synonym

Tetraedron staurastroides (W.West) Willie species accepted

Tetraedron valdezii Kol. species accepted

Tetraedron trilobulatum (Reinsch) Hansgirg species accepted

Tetraedron victoriae Woloszynska species accepted

Tetraedron obesum (West Amd West) Wille Ex Brun. species accepted

Tetraedron pusillum (Wallich) West & West species accepted

Tetraedron duospinum Ackley, 1924 species accepted

Tetraëdron pentaedricum West & G.S.West species accepted

Tetraëdron arthrodesmiforme (West) Wolosz. species accepted

Tetraedron spiniferum G.M.Smith species accepted

Tetraedron heteracanthum species accepted

Tetraedron armatus (Reinsch) De Toni species accepted

Tetraedron starmachii Sieminska species accepted

Tetraedron smithii (G.M.Smuith) Tiffany species accepted

Tetraedron varia species accepted

Tetraedron irregulare Kuetzing species accepted

Tetraedron cruciatum (Wallich) West & West species accepted

Tetraedron quadricuspidatum (Reinsch) Hansgirg species accepted

Tetraedron lunula (Reinsch) Wille species homotypic synonym

Tetraedron asymmetricum species accepted

Polyedrium trilobulatum Reinsch, 1888 species synonym

Tetraedron limneticum Borge species proparte synonym

Tetraedron gigas (Wittr.) Hansgirg species accepted

Tetraedron glabrum (Roll) Ahlstrom & Tiffany species accepted

Asteriscium caudatum Corda, 1839 species synonym

Tetraedron quadrilobatum G.M.Sm. species accepted

Tetraedron trigonum var. gracile (Reinsch) Detoni variety homotypic synonym

Tetraëdron lunula (Reinsch) Hansg. species accepted

Tetraëdron longispinum (Perty) Hansg. species accepted

Tetraëdron minutissimum Korshikov species accepted

Polyedrium trigonum Nägeli species synonym

Tetraedriella tumidula (Reinsch) Krienitz & Heynig species synonym

Polyedrium gracile Reinsch species homotypic synonym

Tetraedron paraincus Batten, 1988 species accepted

Tetraedron obesum (West Amd West) Wille species homotypic synonym

Tetraëdron minimum (A.Braun) Hansg. species accepted