Back
Acanthaulax wilsonii
Acanthaulax wilsonii, Yun Hyesu, 1981, p. 7-8
NOW Cribroperidinium. Originally Acanthaulax, subsequently (and now) Cribroperidinium.
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.
Paratype: Yun, 1981; Jan du Chene et al. 1986
Locus typicus: Timmermann brickyard near Esbeck, Germany
Stratum typicum: Santonian
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Yun, 1981, p.7-8] (Translation: Fensome et al., 1991, p. 774):
Diagnosis:
Proximochorate, tabulate cyst with a globular to ovoidal central body and isolated intratabular and proximally or medially interconnected penitabular spines which are usually capitate, rarely acuminate. The paraplates, which are marked by penitabular spines, show the same arrangement as in Gonyaulacysta. A relatively small, triangular archeopyle is formed through the loss of paraplate 3".
Description:
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 µm). 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 spine-free, pandasutural zone. The 4 - 5 µm 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.
NOW Cribroperidinium. Originally Acanthaulax, subsequently (and now) Cribroperidinium.
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.
Paratype: Yun, 1981; Jan du Chene et al. 1986
Locus typicus: Timmermann brickyard near Esbeck, Germany
Stratum typicum: Santonian
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Yun, 1981, p.7-8] (Translation: Fensome et al., 1991, p. 774):
Diagnosis:
Proximochorate, tabulate cyst with a globular to ovoidal central body and isolated intratabular and proximally or medially interconnected penitabular spines which are usually capitate, rarely acuminate. The paraplates, which are marked by penitabular spines, show the same arrangement as in Gonyaulacysta. A relatively small, triangular archeopyle is formed through the loss of paraplate 3".
Description:
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 µm). 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 spine-free, pandasutural zone. The 4 - 5 µm 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.