Polygonium uncinatum (Downie, 1958) Richardson and Rasul, 1978

Now Stellechinatum uncinatum (an acritarch species). Originally Hystrichosphaeridium longispinosum var. uncinatum, subsequently Baltisphaeridium longispinosum var. uncinatum (an acritarch varietas), thirdly Baltisphaeridium uncinatum (an acritarch species), fourthly Micrhystridium uncinatum (an acritarch species), fifthly Goniosphaeridium uncinatum (an acritarch species), sixthly Polygonium uncinatum, seventhly (and now) Stellechinatum uncinatum (an acritarch species); see also Goniosphaeridium polygonale ssp. uncinatum (an acritarch subspecies; combination not validly
published).
Tax. sr. synonym of the acritarch species Goniosphaeridium regulare Yin Leiming in Chen Yunyuan et al., 1985, according to Yin Leiming, 1986.
Holotype: Downie, 1958, text-fig.2a
Age: Early Ordovician