Goniosphaeridium polygonale ssp. uncinatum (Downie, 1958) Tynni, 1982
Acritarch genus

Combination not validly published since Tynni, 1982 did not fully reference the basionym.
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 (an acritarch species), seventhly
Goniosphaeridium polygonale ssp. uncinatum (combination not validly published), eightly (and now) Stellechinatum uncinatum (an acritarch species).
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