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Horologinella extrema
Horologinella? extrema Cookson and Eisenack, 1962, p.272-273
NOW Paucilobimorpha (Acritarch). Originally Horologinella?, subsequently (and now) Paucilobimorpha (Acritarch). Questionable assignment: Cookson and Eisenack (1962a, p.272). Pestchevitskaya (2001, p.106; 2003, p.53) included this species in Horologinella but did not mention its transfer to Paucilobimorpha.
Holotype: Cookson and Eisenack, 1962a, pl.37, fig.10; Pestchevitskaya, 2001, pl.2, fig.16; Pestchevitskaya, 2003, pl.2, fig.4
Paratype: Cookson and Eisenack, 1962
Locus typicus: Rough Range South No. 1 Bore, W Australia
Stratum typicum: Cenomanian
Original description: Cookson and Eisenack, 1962, p.272-273
Shell thin-walled with one diameter longer than the other, two of the four sides convex the other two so deeply concave that the two halves of the shell are only attached to one another by a narrow "neck". No opening has been observed.
Dimensions: Holotype 30x52 µm, width of "neck" 17 µm. Paratype 30x55 µm.
NOW Paucilobimorpha (Acritarch). Originally Horologinella?, subsequently (and now) Paucilobimorpha (Acritarch). Questionable assignment: Cookson and Eisenack (1962a, p.272). Pestchevitskaya (2001, p.106; 2003, p.53) included this species in Horologinella but did not mention its transfer to Paucilobimorpha.
Holotype: Cookson and Eisenack, 1962a, pl.37, fig.10; Pestchevitskaya, 2001, pl.2, fig.16; Pestchevitskaya, 2003, pl.2, fig.4
Paratype: Cookson and Eisenack, 1962
Locus typicus: Rough Range South No. 1 Bore, W Australia
Stratum typicum: Cenomanian
Original description: Cookson and Eisenack, 1962, p.272-273
Shell thin-walled with one diameter longer than the other, two of the four sides convex the other two so deeply concave that the two halves of the shell are only attached to one another by a narrow "neck". No opening has been observed.
Dimensions: Holotype 30x52 µm, width of "neck" 17 µm. Paratype 30x55 µm.