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Cribroperidinium wilsonii
Cribroperidinium wilsonii (Yun 1981) Poulsen 1996
Originally Acanthaulax, subsequently (and now) Cribroperidinium.
Taxonomic junior synonym: Acanthaulax saetosa (name not validly published), according to Slimani (2001a, p.192).
Junior homonym: Cribroperidinium wilsonii (Slimani, 1994) Schiøler et al., 1997.
Holotype: Yun Hyesu, 1981, pl.1, fig.6; Jan du Chêne et al., 1986a, pl.2, fig.18; Fensome et al., 1991, fig.3 - p.773.
Age: Late Campanian.
Poulsen 1996, p. 78
Cribroperidinium wilsonii (Yun 1981) comb. nov.
Acanthaulax wilsonii Yun, 1981, p. 7-8, pl. 1, figs. 2-3, 6-7a-b.
Remarks. Acanthaulax wilsonii is included in Cribroperidinium.
Original description: Yun, 1981, p. 8
The central body is of oval, rounded or angularly rounded outline and consists of a single wall layer which may be finely perforate (perforations below 1 llm). The central body has numerous, solid, penitabular and intratabular spines which taper distally, their free end either thickened and ilared or occasionally pointed. The penitabular spines are arranged in rows, generally interconnected proximally and commonly also medially or distally, so that they appear to form a perforated [spine] wall. Apart from these [spines] there are also 2-12 isolated, occasionally distally forked intratabular spines per plate. Between the 'spine walls' is a spinefree, pandasutural zone. The 4 - 5 llm wide paracingulum is weakly helicoidal and not subdivided. The narrow parasulcus is recognizable by an interruption of the cingulum and an absence of spines. The paratabulation shows the following arrangement: 3' (?4'), 6", 6''', lp, 1''''. Occasionally, there is an apical horn (?) comprised of spines.
Originally Acanthaulax, subsequently (and now) Cribroperidinium.
Taxonomic junior synonym: Acanthaulax saetosa (name not validly published), according to Slimani (2001a, p.192).
Junior homonym: Cribroperidinium wilsonii (Slimani, 1994) Schiøler et al., 1997.
Holotype: Yun Hyesu, 1981, pl.1, fig.6; Jan du Chêne et al., 1986a, pl.2, fig.18; Fensome et al., 1991, fig.3 - p.773.
Age: Late Campanian.
Poulsen 1996, p. 78
Cribroperidinium wilsonii (Yun 1981) comb. nov.
Acanthaulax wilsonii Yun, 1981, p. 7-8, pl. 1, figs. 2-3, 6-7a-b.
Remarks. Acanthaulax wilsonii is included in Cribroperidinium.
Original description: Yun, 1981, p. 8
The central body is of oval, rounded or angularly rounded outline and consists of a single wall layer which may be finely perforate (perforations below 1 llm). The central body has numerous, solid, penitabular and intratabular spines which taper distally, their free end either thickened and ilared or occasionally pointed. The penitabular spines are arranged in rows, generally interconnected proximally and commonly also medially or distally, so that they appear to form a perforated [spine] wall. Apart from these [spines] there are also 2-12 isolated, occasionally distally forked intratabular spines per plate. Between the 'spine walls' is a spinefree, pandasutural zone. The 4 - 5 llm wide paracingulum is weakly helicoidal and not subdivided. The narrow parasulcus is recognizable by an interruption of the cingulum and an absence of spines. The paratabulation shows the following arrangement: 3' (?4'), 6", 6''', lp, 1''''. Occasionally, there is an apical horn (?) comprised of spines.