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Williams, D.M., Sims, P.A. and Witkowski, J. 2023.

Notes on the rare Cretaceous species Syndetocystis uralensis Strelnikova leading to the description of a new monotypic genus Monoportula P.A.Sims et D.M.Williams nov. gen.

. Phytotaxa. 595, 2 (May 2023), 219–224. DOI:https://doi.org/10.11646/phytotaxa.595.2.8.