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Psaligonyaulax simplicia
Psaligonyaulax simplicia (Cookson and Eisenack, 1961) Sarjeant, 1969
Now Impagidinium?. Originally Rottnestia, subsequently Psaligonyaulax, thirdly (and now) Impagidinium?. This combination was not validly published in Sarjeant, 1966 since that author did not fully reference the basionym.
Holotype: Cookson and Eisenack, 1961, pl.2, figs.3-4; Jan du Chêne et al., 1986, pl.54, figs.1-5
Locus typicus: Rottnest Bore, W. Australia
Stratum typicum: Eocene
Original diagnosis: Cookson and Eisenack, 1961, p.42: Rottnestia simplicia
Shell without appendages. Apical and antapical expansions of the same construction as those of R. borussica but less strongly developed, apical horn well marked. Longitudinal furrow distinct, broadening towards the antapex, Girdle, tabulation and pylome similar to those of R. borussica. The internal body is elongate-oval in outline.
Dimensions: Type - Length 83 µm, breadth 56 µm, internal body 60 x 38 µm.
Now Impagidinium?. Originally Rottnestia, subsequently Psaligonyaulax, thirdly (and now) Impagidinium?. This combination was not validly published in Sarjeant, 1966 since that author did not fully reference the basionym.
Holotype: Cookson and Eisenack, 1961, pl.2, figs.3-4; Jan du Chêne et al., 1986, pl.54, figs.1-5
Locus typicus: Rottnest Bore, W. Australia
Stratum typicum: Eocene
Original diagnosis: Cookson and Eisenack, 1961, p.42: Rottnestia simplicia
Shell without appendages. Apical and antapical expansions of the same construction as those of R. borussica but less strongly developed, apical horn well marked. Longitudinal furrow distinct, broadening towards the antapex, Girdle, tabulation and pylome similar to those of R. borussica. The internal body is elongate-oval in outline.
Dimensions: Type - Length 83 µm, breadth 56 µm, internal body 60 x 38 µm.