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Ginginodinium claustrum
From Fensome et al., 2019:
Ginginodinium? claustrum Islam, 1983b, p.339, pl.2, figs.12–14; text-fig.6. Holotype: Islam, 1983b, pl.2, figs.12–13; text-fig.6. Questionable assignment: Islam (1983b, p.339). Age: Early Eocene.
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Paratype: Islam, 1983
Locus typicus: Hampshire Basin, S England
Stratum typicum: Early Eocene
Original diagnosis: Islam, 1983, p. 339
Cyst dorsoventrally compressed peridinioid, bearing short apical horn with blunt tip, acavate, proximochorate and biphragmal; endophragm chagrinate or microreticulate; periphragm chagrinate; penitabular septa of variable heights not exceeding 5 µm, with variable distal indentations, Iying too close to parasutures to look parasutural in location; paratabulation 4', 3a, 7'', 6c, 5''', 2'''', 1-3s; critically located posterior septa often resembling antapical horns, which are absent; a few forms with divided septa, resembling discrete processes; archeopyle intercalary type 3I/3I with free opercular pieces.
Dimensions: Holotype: cyst body 45 x 40 µm, length of apical horn 6 µm. Range: cyst length 48(38)32 µm, breadth 48(39)31 µm, length of apical horn 8(6)4 µm. Specimens measured: 12.
Affinities:
Islam, 1983, p. 339: This species differs from others of the genus in possessing closely Iying penitabular septa and in the absence of intratabular ornamentation. Its generic allocation remains tentative for the latter.
Ginginodinium? claustrum Islam, 1983b, p.339, pl.2, figs.12–14; text-fig.6. Holotype: Islam, 1983b, pl.2, figs.12–13; text-fig.6. Questionable assignment: Islam (1983b, p.339). Age: Early Eocene.
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Paratype: Islam, 1983
Locus typicus: Hampshire Basin, S England
Stratum typicum: Early Eocene
Original diagnosis: Islam, 1983, p. 339
Cyst dorsoventrally compressed peridinioid, bearing short apical horn with blunt tip, acavate, proximochorate and biphragmal; endophragm chagrinate or microreticulate; periphragm chagrinate; penitabular septa of variable heights not exceeding 5 µm, with variable distal indentations, Iying too close to parasutures to look parasutural in location; paratabulation 4', 3a, 7'', 6c, 5''', 2'''', 1-3s; critically located posterior septa often resembling antapical horns, which are absent; a few forms with divided septa, resembling discrete processes; archeopyle intercalary type 3I/3I with free opercular pieces.
Dimensions: Holotype: cyst body 45 x 40 µm, length of apical horn 6 µm. Range: cyst length 48(38)32 µm, breadth 48(39)31 µm, length of apical horn 8(6)4 µm. Specimens measured: 12.
Affinities:
Islam, 1983, p. 339: This species differs from others of the genus in possessing closely Iying penitabular septa and in the absence of intratabular ornamentation. Its generic allocation remains tentative for the latter.