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Circulodinium wulagenense
From Fensome et al., 2019:
Circulodinium wulagenense (He Chengquan, 1991, p.57, pl.9, fig.16) He Chengquan et al., 2009, p.272. Holotype: He Chengquan, 1991, pl.9, fig.16; Fensome et al., 2019a, fig.15H. Originally Canningia, subsequently Circulodinium, thirdly (and now) Circulodinium?. Questionable assignment: Fensome et al. (2019a, p.39). Fensome et al. (2019a, p.39) recommended that this species be restricted to the holotype. Age: Late Cretaceous.
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Original description: [He Chengquan, 1991]: (translated by Suning Hou, 07-01-2019):
Description:
Cyst oblique (inclined) side flattened, outline elongated - nearly pentagonal, lack of apical horn, antapical concave, 2 wide, circle antapical horns tiny display and unequal.
Cyst wall thin, the surface granulate and diluted short rod-like processes, which expand distally, about 20 on the outline, of which the majority are on the antapical horns, but absent at the antapical concave place (equivalent to sulcus), and even the particles are deteriorated.
There is no trace of the cingulum.
Apical archeopyle, type (tA), caused by the movement of the apical part, edge clearly angular. Operculum completely separated and preserved in-situ.
Dimensions:
Holotype length (excluding processes) 75 μm, lateral side width about 60 μm, process 1-2.5 μm.
Affinities:
The new species is somewhat similar in morphology to Canningia chinensis (sp. Nov.) And C. insignis (sp. Nov.). However, C. wulagenensis lacks a apical horn, whereas C. chinensis has an apical horn, process spiny; C. insignis is smaller, apical horn visible, antapical horns relatively long.
Circulodinium wulagenense (He Chengquan, 1991, p.57, pl.9, fig.16) He Chengquan et al., 2009, p.272. Holotype: He Chengquan, 1991, pl.9, fig.16; Fensome et al., 2019a, fig.15H. Originally Canningia, subsequently Circulodinium, thirdly (and now) Circulodinium?. Questionable assignment: Fensome et al. (2019a, p.39). Fensome et al. (2019a, p.39) recommended that this species be restricted to the holotype. Age: Late Cretaceous.
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Original description: [He Chengquan, 1991]: (translated by Suning Hou, 07-01-2019):
Description:
Cyst oblique (inclined) side flattened, outline elongated - nearly pentagonal, lack of apical horn, antapical concave, 2 wide, circle antapical horns tiny display and unequal.
Cyst wall thin, the surface granulate and diluted short rod-like processes, which expand distally, about 20 on the outline, of which the majority are on the antapical horns, but absent at the antapical concave place (equivalent to sulcus), and even the particles are deteriorated.
There is no trace of the cingulum.
Apical archeopyle, type (tA), caused by the movement of the apical part, edge clearly angular. Operculum completely separated and preserved in-situ.
Dimensions:
Holotype length (excluding processes) 75 μm, lateral side width about 60 μm, process 1-2.5 μm.
Affinities:
The new species is somewhat similar in morphology to Canningia chinensis (sp. Nov.) And C. insignis (sp. Nov.). However, C. wulagenensis lacks a apical horn, whereas C. chinensis has an apical horn, process spiny; C. insignis is smaller, apical horn visible, antapical horns relatively long.