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Archeotectatum
From Williams et al., 2017:
[Archeotectatum, Habib, 1972, p. 375-376
tax. jr. syn. of Apteodinium eisenack, 1958, according to Stover and Eitt, 1978, and Jan du Chêne et al., 1986. Lentin and Williams, 1981, 1989, retained Archeotectatum as a separate genus.
Type species: Archeotectatum sarjeantii, Habib, 1972 (pl.5, fig.3)]
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Original description: [Habib, 1972]:
Diagnosis:
Proximate dinoflagellate cyst. Outline polygonal in lateral view, with an apical horn ant two rounded antapical horns; essentially oval in dorsoventral compression. Wall is thick and spongy. Archaeopyle precingular. Untabulated. Ornamentation variable.
Affinities:
Archeotectadinium is similar to Tectatodinium Wall with respect to the thick wall and precingular archeopyle. It is distinguished by the occurrence of apical and antapical horns. The genus closely resembles Apteodinium Eisenack but is distinguished by its thick tectum-like wall.
[Archeotectatum, Habib, 1972, p. 375-376
tax. jr. syn. of Apteodinium eisenack, 1958, according to Stover and Eitt, 1978, and Jan du Chêne et al., 1986. Lentin and Williams, 1981, 1989, retained Archeotectatum as a separate genus.
Type species: Archeotectatum sarjeantii, Habib, 1972 (pl.5, fig.3)]
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Original description: [Habib, 1972]:
Diagnosis:
Proximate dinoflagellate cyst. Outline polygonal in lateral view, with an apical horn ant two rounded antapical horns; essentially oval in dorsoventral compression. Wall is thick and spongy. Archaeopyle precingular. Untabulated. Ornamentation variable.
Affinities:
Archeotectadinium is similar to Tectatodinium Wall with respect to the thick wall and precingular archeopyle. It is distinguished by the occurrence of apical and antapical horns. The genus closely resembles Apteodinium Eisenack but is distinguished by its thick tectum-like wall.