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Hashenia
From Fensome et al., 2019:
"Hashenia", Yu Jingxian and Zhang Wangping, 1980, p.107.
Taxonomic senior synonym: Canningia, according to Chen et al. (1988, p.16).
Type: Yu Jingxian and Zhang Wangping, 1980, pl.2, fig.1, as Hashenia reticulata.
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Original description: [Yu Jing-xian and Zhang Wang-ping, 1980]: (Translation: Suning Hou 2025):
Genus Hashenia gen. nov
Type species: Hashenia reticulata gen. et sp. nov.
Characteristics: The cyst has a 4- to 6-sided polygonal contour. The central body is surrounded by an outer membrane approximately 3–4 µm, with reticulate ornamentation. It features a cingulum and a slightly indistinct apical horn. Apical archeopyle
Comparison: The new genus is characterized by a central body surrounded by a thin outer membrane, resembling the genus Membranilarnacia. However, it can be distinguished from the latter by the absence of a cingulum and an apical archeopyle in Membranilarnacia. The apical archeopyle features are similar to those of the genus Canningia, but Canningia cysts lack an outer membrane and rarely exhibit a distinct cingulum, setting them apart.
"Hashenia", Yu Jingxian and Zhang Wangping, 1980, p.107.
Taxonomic senior synonym: Canningia, according to Chen et al. (1988, p.16).
Type: Yu Jingxian and Zhang Wangping, 1980, pl.2, fig.1, as Hashenia reticulata.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Yu Jing-xian and Zhang Wang-ping, 1980]: (Translation: Suning Hou 2025):
Genus Hashenia gen. nov
Type species: Hashenia reticulata gen. et sp. nov.
Characteristics: The cyst has a 4- to 6-sided polygonal contour. The central body is surrounded by an outer membrane approximately 3–4 µm, with reticulate ornamentation. It features a cingulum and a slightly indistinct apical horn. Apical archeopyle
Comparison: The new genus is characterized by a central body surrounded by a thin outer membrane, resembling the genus Membranilarnacia. However, it can be distinguished from the latter by the absence of a cingulum and an apical archeopyle in Membranilarnacia. The apical archeopyle features are similar to those of the genus Canningia, but Canningia cysts lack an outer membrane and rarely exhibit a distinct cingulum, setting them apart.