Originally published as 'comb. nov.' based on invalid morphographic name 'Leiotriletes obsoletes' S.N. Naumova (in Trachytriletes obsoletes S. N. Naumova, Spory nizhnego kembrija [Spores of the Lower Cambrian] pp.[52]. 1949) with designation of the holotype (originally 'lectotype') and providing species description. However, Jankauskas provided in synonymy of the new species several formerly validly published species, viz. Protosphaeridium parvulum Timofeev, P. paleaceum Timofeev, Leiosphaeridia volynica Timofeev, and others, which render the new validated species name as nomenclaturally superfluous.
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