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Tapeinosphaeridium pericompsum
Tapeinosphaeridium pericompsum Ioannides et al., 1977
Now Chytroeisphaeridia. Originally Tapeinosphaeridium, subsequently (and now) Chytroeisphaeridia.
Holotype: Ioannides et al., 1977, pl.5, fig.1
Locus typicus: Clavell"s Hard, Dorset, England
Stratum typicum: Kimmeridgian
Original diagnosis: Ioannides et al., 1977, p. 463
Shell spherical to elongate, smooth thin-walled. Tabulation absent. Cingulum and sulcus not observed. A precingular archaeopyle usually present.
Original description: Ioannides et al., 1977, p. 463
Shell smooth, thin, one-layered. A precingular subtriangular to subpolygonal archaeopyle usually present. Secondary folds running on or parallel to periphery always observed.
Dimensions. Range: shell length 40-88 µm, breadth 38-85 µm (45 specimens measured).
Affinities:
Ioannides et al., 1977, p. 463: It differs from Chytroeisphaeridla chytroeides Sarjeant, 1962, in the position of the archaeopyle being apical in the latter species.
Now Chytroeisphaeridia. Originally Tapeinosphaeridium, subsequently (and now) Chytroeisphaeridia.
Holotype: Ioannides et al., 1977, pl.5, fig.1
Locus typicus: Clavell"s Hard, Dorset, England
Stratum typicum: Kimmeridgian
Original diagnosis: Ioannides et al., 1977, p. 463
Shell spherical to elongate, smooth thin-walled. Tabulation absent. Cingulum and sulcus not observed. A precingular archaeopyle usually present.
Original description: Ioannides et al., 1977, p. 463
Shell smooth, thin, one-layered. A precingular subtriangular to subpolygonal archaeopyle usually present. Secondary folds running on or parallel to periphery always observed.
Dimensions. Range: shell length 40-88 µm, breadth 38-85 µm (45 specimens measured).
Affinities:
Ioannides et al., 1977, p. 463: It differs from Chytroeisphaeridla chytroeides Sarjeant, 1962, in the position of the archaeopyle being apical in the latter species.