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Hystrichosphaeridium heteracanthum ssp. heteracanthum
Hystrichosphaeridium heteracanthum ssp. heteracanthum Deflandre and Cookson 1955
Autonym. Now Heterosphaeridium? heteracanthum ssp. heteracanthum. Originally Hystrichosphaeridium heteracanthum ssp. heteracanthum, subsequently Heterosphaeridium heteracanthum ssp. heteracanthum, thirdly (and now) Heterosphaeridium? heteracanthum ssp. heteracanthum
Holotype: Deflandre and Cookson, 1955, pl.2, fig.5
Locus typicus: Victoria, Australia
Stratum typicum: ?Late Cretaceous-Early Eocene
Original description: Deflandre and Cookson, 1955, p. 276
Shell large, approximately circular in outline, with numerous appandages of variable size, shape and form. Appandages solid, usually elongated, frequently filiform, sometimes as beoad as long, the apices either pointed, everted, or irregulary branched. Surface of shell punctate.
Dimensions: Shell 56-107 µm, appandages 5-36 µm long (majority between 13 and 23 µm).
Autonym. Now Heterosphaeridium? heteracanthum ssp. heteracanthum. Originally Hystrichosphaeridium heteracanthum ssp. heteracanthum, subsequently Heterosphaeridium heteracanthum ssp. heteracanthum, thirdly (and now) Heterosphaeridium? heteracanthum ssp. heteracanthum
Holotype: Deflandre and Cookson, 1955, pl.2, fig.5
Locus typicus: Victoria, Australia
Stratum typicum: ?Late Cretaceous-Early Eocene
Original description: Deflandre and Cookson, 1955, p. 276
Shell large, approximately circular in outline, with numerous appandages of variable size, shape and form. Appandages solid, usually elongated, frequently filiform, sometimes as beoad as long, the apices either pointed, everted, or irregulary branched. Surface of shell punctate.
Dimensions: Shell 56-107 µm, appandages 5-36 µm long (majority between 13 and 23 µm).