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Ctenidodinium thulium
Ctenidodinium? thulium (Davies, 1983) Jan du Chêne et al., 1986
Originally Occisucysta, subsequently (and now) Ctenidodinium?. Jan du Chêne et al., 1986, considered this to be a provisionally accepted species of Ctenidodinium.
Holotype: Davies, 1983, pl.5, figs.10-11
Locus typicus: Eastern Cornwall Island, Northwest Territories, Canada
Stratum typicum: Middle Callovian-Oxfordian
Original diagnosis: Davies, 1983, p. 19: Occisucysta thulia
A large oblate species of Occisucysta marked by denticulate crests and penitabular hair-like spines. Tabulation: "?4". ?a, 6", 6c, ?""",?"""". Archeopyle: P(3). Size: length- 83(89)94 Ám; breadth - 80(92)112 Ám.
Original description: Davies, 1983, p. 19: Occisucysta thulia
The hair-like spines (2-5 Ám long) arise in penitabular bands around the periphery of the plates leaving the centre of the plates less ornamented. The sutural crests are 8 Ám high. The cyst is usually polarly compressed and is oval in outline. When eventually compressed it has a rounded pentagonal outline with little or no apical horn development. It is often split epitractally.
Affinities:
Davies, 1983, p. 20: Occisucysta thulia
The large size, the denticulate crests and the hair like spines distinguish it from all other species of Occisucysta.
Originally Occisucysta, subsequently (and now) Ctenidodinium?. Jan du Chêne et al., 1986, considered this to be a provisionally accepted species of Ctenidodinium.
Holotype: Davies, 1983, pl.5, figs.10-11
Locus typicus: Eastern Cornwall Island, Northwest Territories, Canada
Stratum typicum: Middle Callovian-Oxfordian
Original diagnosis: Davies, 1983, p. 19: Occisucysta thulia
A large oblate species of Occisucysta marked by denticulate crests and penitabular hair-like spines. Tabulation: "?4". ?a, 6", 6c, ?""",?"""". Archeopyle: P(3). Size: length- 83(89)94 Ám; breadth - 80(92)112 Ám.
Original description: Davies, 1983, p. 19: Occisucysta thulia
The hair-like spines (2-5 Ám long) arise in penitabular bands around the periphery of the plates leaving the centre of the plates less ornamented. The sutural crests are 8 Ám high. The cyst is usually polarly compressed and is oval in outline. When eventually compressed it has a rounded pentagonal outline with little or no apical horn development. It is often split epitractally.
Affinities:
Davies, 1983, p. 20: Occisucysta thulia
The large size, the denticulate crests and the hair like spines distinguish it from all other species of Occisucysta.