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Total: 266

species valid

Sapindopsis angusta (Heer) Seward, V.M.Conway Kongl. Svenska Vetensk.-Akad. Handl. N.F., Series 3, 15(3): 29. 31 Dec 1935

species valid

Schizolepis moelleri Seward Trudy Geol. Komit., New Series, (38): 39. 1907

species valid

Sciadopitytes borealis (Heer) Seward, V.M.Conway Meddel. Grønland, 93(5): 12. 12 Nov 1935

species valid

Sciadopitytes crameri (Heer) Seward Philos. Trans., Ser. B, 215(422): 105. 9 Aug 1926

species valid

Sciadopitytes eirikianus (Heer) Seward Philos. Trans., Ser. B, 215(422): 106. 9 Aug 1926

species valid

Selaginellites dawsonii Seward Quart. J. Geol. Soc. London, Part I, 69(273): 87. 25 Apr 1913

species valid

Sequoites concinnus (Heer) Seward Philos. Trans., Ser. B, 215(422): 102. 9 Aug 1926

species valid

Sequoites langsdorfii (Brongn. ex Endl.) Seward, Holttum in E.B. Bailey, Clough, W.B. Wright, Richey, G.V. Wilson Tert. & Post-Tert. Geol. Mull 75. 1924

species valid

Sewardia saportae (Seward) Seward Quart. J. Geol. Soc. London, Part I, 69(273): 107. 25 Apr 1913

species valid

Sphenophyllostachys dawsonii (Will.) Seward Sci. Progr. (London, 1894–1900), 5(30): 436. Aug 1896

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