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Bohaidina microreticulata
Bohaidina microreticulata, Jiabo, 1978; emend. Xu Jinli and Mao Shaozhi, 1989
Holotype: Jiabo, 1978, pl.10, fig.2
Age: Early Tertiary
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Supplemented and emended description:
Xu Jinli and Mao Shaozhi, 1989: (Provisional translation by GSC: courtesy R. Fensome):
Description:
Cyst subrhombic in outline, triangular in lateral view. Two girdle projections developed around both equatorial edges in ventral side. Dorsal side in lateral view bow-like in shape. Wall autophragm, its surface finely reticulate with polygonal to rounded polygonal mesh uniformly arranged. Combination archeopyle of tAa+3Ia type, opercula compound. Apical piece remaining in situ or falling towards ventral side, is attached ventrally to the cyst, or torn away from cyst, leaving a zigzag edge.
Discussion:
Under the present emendation Bohaidina microreticulata is defined as forms whose girdle projection in dorsal side degenerated and dorsal side convex strongly like a bow, by which it differs from Bohaidina dorsiprominentis.
Holotype: Jiabo, 1978, pl.10, fig.2
Age: Early Tertiary
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Supplemented and emended description:
Xu Jinli and Mao Shaozhi, 1989: (Provisional translation by GSC: courtesy R. Fensome):
Description:
Cyst subrhombic in outline, triangular in lateral view. Two girdle projections developed around both equatorial edges in ventral side. Dorsal side in lateral view bow-like in shape. Wall autophragm, its surface finely reticulate with polygonal to rounded polygonal mesh uniformly arranged. Combination archeopyle of tAa+3Ia type, opercula compound. Apical piece remaining in situ or falling towards ventral side, is attached ventrally to the cyst, or torn away from cyst, leaving a zigzag edge.
Discussion:
Under the present emendation Bohaidina microreticulata is defined as forms whose girdle projection in dorsal side degenerated and dorsal side convex strongly like a bow, by which it differs from Bohaidina dorsiprominentis.