The INTERNATIONAL FOSSIL PLANT NAMES INDEX
Global registry of scientific names of fossil organisms covered by the International Code of Nomenclature for Algae, Fungi, and Plants and the International Code of Zoological Nomenclature © 2014-2025

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Total: 70515

species valid

Helenia undata Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Matem. Estestv. Nauk, 1931, (4): 564. Jun 1931

species valid

Helenia costata Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Matem. Estestv. Nauk, 1931, (4): 564. Jun 1931

species valid

Helenia microrugosa Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Matem. Estestv. Nauk, 1931, (4): 564. Jun 1931

species valid

Helenia confluens Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Matem. Estestv. Nauk, 1931, (4): 563. Jun 1931

species valid

Helenia approximata Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Matem. Estestv. Nauk, 1931, (4): 562. Jun 1931

species valid

Sigillaria tchirkovaeana Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Fiz.-Matem. Nauk, 1930, (3): 230. 26 Mar 1930

species valid

Demetria amadoca Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Fiz.-Matem. Nauk, 1930, (3): 232. 26 Mar 1930

species valid

Rimnocladon minutum Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Fiz.-Matem. Nauk, 1930, (3): 227. 26 Mar 1930

species valid

Helenia inopinata Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Fiz.-Matem. Nauk, 1930, (3): 226. 26 Mar 1930

species valid

Micheevia pulchella Zalessky Izv. Akad. Nauk S.S.S.R., Ser. 7, Otdel. Fiz.-Matem. Nauk, 1930, (3): 225. 26 Mar 1930