Robuta

https://pure.unileoben.ac.at/en/publications/porferitubus-lirimi-n-sp-a-new-tubiferous-microfossil-incertae-se/ Porferitubus lirimi n. sp., a new tubiferous microfossil incertae sedis (Cyanophyta?) from the... a new incertae sedis from the tubiferous microfossil