Tetracyclus baicalensis Skvortzow ex Proschkina-Lavrenko 1950 [Link to DiatomBase]
Tetracyclus celatom Okuno 1958 [Link to DiatomBase]
Tetracyclus chankaicu s Dubrovina, Usoltseva, Pushkar & Likhacheva 2014
Tetracyclus chudjakovii Pushkar 1983 [Link to DiatomBase]
Tetracyclus circulus Jousé 1952 [Link to DiatomBase]
Tetracyclus clypeus (Ehrenberg) Li 1982 [Link to DiatomBase]
Tetracyclus cruciformis Andrews 1970 [Link to DiatomBase]
Tetracyclus divisum (Ehrenberg) Li 1982 [Link to DiatomBase]
Tetracyclus dunhuanensis Li 1984 [Link to DiatomBase]
Tetracyclus ellipticus f. apiculata Okuno 1959 [Link to DiatomBase]
Tetracyclus ellipticus f. chilensis Krasske 1939 [Link to DiatomBase]
Tetracyclus ellipticus f. chilensis Krasske 1939 [Link to DiatomBase]
Tetracyclus ellipticus f. elongata Hustedt 1914 [Link to DiatomBase]
Tetracyclus ellipticus f. lata Hustedt 1914 [Link to DiatomBase]
Tetracyclus ellipticus f. major Hustedt in Schmidt et al. 1914 [Link to DiatomBase]
Tetracyclus ellipticus f. minor Hustedt in Schmidt et al. 1914 [Link to DiatomBase]
Tetracyclus ellipticus f. minor Hustedt ex Simonsen 1987
Tetracyclus ellipticus f. subrostrata Hustedt 1914 [Link to DiatomBase]
Tetracyclus ellipticus var. constricta Hustedt 1914
Tetracyclus ellipticus var. inflata (inflatus) Hustedt in Schmidt et al. 1914 [Link to DiatomBase]
Tetracyclus ellipticus var. ovalifolius Li 1984 [Link to DiatomBase]
Tetracyclus ellipticus var. penzhicus Lupikina et Dolmatova 1985 [Link to DiatomBase]
Tetracyclus ellipticus var. rostrata Li 1984 [Link to DiatomBase]
Tetracyclus excentricum (Ehrenberg) Williams 1989 [Link to DiatomBase]
Tetracyclus floriformis Tscheremissionva 1971 [Link to DiatomBase]
Tetracyclus glans (Ehrenberg; Ehrenberg; Ehrenberg) 1935 [Link to DiatomBase]
Tetracyclus hinziae Bish op & Spaulding 2015 2015
Tetracyclus jaoi Li 1984 [Link to DiatomBase]
Tetracyclus javanicus Hustedt in Schmidt et al. 1914 [Link to DiatomBase]
Tetracyclus jiayingii D.M. Williams 2008 [Link to DiatomBase]
Tetracyclus jimboi (Pantocsek) Jousé 1952 [Link to DiatomBase]
Tetracyclus kingstonii D.M. Williams 2008 [Link to DiatomBase]
Tetracyclus krasskei D.M. Williams 2014 2014
Tetracyclus lacustris (baicalensis) (Skvortzow) Skabichevskii 1977 [Link to DiatomBase]
Tetracyclus lacustris f. heterocapitata Tynni 1982 [Link to DiatomBase]
Tetracyclus lacustris var. capitatus (capitata) Hustedt in Schmidt et al. 1914 [Link to DiatomBase]
Tetracyclus lacustris var. compactus Hustedt in Schmidt et al. 1912 [Link to DiatomBase]
Tetracyclus lacustris var. compactus Hustedt in Schmidt et al. 1914 [Link to DiatomBase]
Tetracyclus lacustris var. elongatus (elongata) Hustedt in Schmidt et al. 1914 [Link to DiatomBase]
Tetracyclus lacustris var. genuinus Cleve-Euler 1953
Tetracyclus lacustris var. lanceolatus Moiseeva 1971 [Link to DiatomBase]
Tetracyclus lacustris var. platycephalus Cleve-Euler 1953 [Link to DiatomBase]
Tetracyclus lacustris var. rhombicus (rhombica) Hustedt in Schmidt et al. 1911 [Link to DiatomBase]
Tetracyclus lacustris var. tenuis Hustedt in Schmidt et al. 1914 [Link to DiatomBase]
Tetracyclus lacustris var. undulata Cleve-Euler 1939 [Link to DiatomBase]
Tetracyclus lapponicus Tynni 1982 [Link to DiatomBase]
Tetracyclus lata (Hustedt) Williams 1996 [Link to DiatomBase]
Tetracyclus maxima Williams 1996 [Link to DiatomBase]
Tetracyclus navicularis Li 1984 [Link to DiatomBase]
Tetracyclus ovalifolius (J. Y. Li) Williams 1996 [Link to DiatomBase]
Tetracyclus ovaliformis Li 1984 [Link to DiatomBase]
Tetracyclus polygibbum (Pantocsek) Jousé 1952 [Link to DiatomBase]
Tetracyclus pseudocastellum Williams 1997 [Link to DiatomBase]
Tetracyclus rostratus Hustedt in Schmidt et al. 1914 [Link to DiatomBase]
Tetracyclus shanduensis Li 1984 [Link to DiatomBase]
Tetracyclus sinensis Li 1984 [Link to DiatomBase]
Tetracyclus subclypeus Li & Williams in Williams & Li 1990 [Link to DiatomBase]
Tetracyclus subdivisium Williams & Li 1990 [Link to DiatomBase]
Tetracyclus subrostrata D.M. Williams 2008 [Link to DiatomBase]
Tetracyclus tscheremissinovae D. M. Williams & G. Reid in Reid, G., Flower, R., & Votyakova, N.E. 2002 [Link to DiatomBase]