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Pseudoceratium pelliferum var. solocispinum
Pseudoceratium pelliferum var. solocispinum Davey, 1974
Now Pseudoceratium solocispinum. Originally Pseudoceratium pelliferum var. solocispinum, subsequently Pseudoceratium pelliferum subsp.
solocispinum, thirdly (and now) Pseudoceratium solocispinum.
Holotype: Davey, 1974, pl.9, fig.6
Locus typicus: Speeton Clay, Speeton, England
Stratum typicum: Middle-late Barremian
Original diagnosis: Davey, 1974, p. 68
A variety of P. pelliferum processing a relatively broad central body, short lateral, apical and antapical horns coarse of ornamentation. The latter consists of spines of variable size and morphology; they may be joined distally or medially and are typically truncated distally. The tabulation is sometimes marked by bands devoid of spines. The cingulum may be entirely barren of processes. An apical archaeopyle, with indications along the precingular plate boundaries, is usually present. The operculum rarely remains in position.
Original description: Davey, 1974, p. 68
The sutural bands are most noticeable between the pre- and postcingular plates. However, it was not possible to determine the tabulation formula. The horns on one specimen are reduced to elongations of the central body. Similar forms are known to occur in the Aptian. A second group of forms, also occurring in the Aptian and probably derived from P. pelliferum, possess broad, rounded horns.
Now Pseudoceratium solocispinum. Originally Pseudoceratium pelliferum var. solocispinum, subsequently Pseudoceratium pelliferum subsp.
solocispinum, thirdly (and now) Pseudoceratium solocispinum.
Holotype: Davey, 1974, pl.9, fig.6
Locus typicus: Speeton Clay, Speeton, England
Stratum typicum: Middle-late Barremian
Original diagnosis: Davey, 1974, p. 68
A variety of P. pelliferum processing a relatively broad central body, short lateral, apical and antapical horns coarse of ornamentation. The latter consists of spines of variable size and morphology; they may be joined distally or medially and are typically truncated distally. The tabulation is sometimes marked by bands devoid of spines. The cingulum may be entirely barren of processes. An apical archaeopyle, with indications along the precingular plate boundaries, is usually present. The operculum rarely remains in position.
Original description: Davey, 1974, p. 68
The sutural bands are most noticeable between the pre- and postcingular plates. However, it was not possible to determine the tabulation formula. The horns on one specimen are reduced to elongations of the central body. Similar forms are known to occur in the Aptian. A second group of forms, also occurring in the Aptian and probably derived from P. pelliferum, possess broad, rounded horns.