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Kisselevia clathrata
Kisselevia clathrata (Eisenack, 1938b, p.187; text-fig.5) Lentin and Williams, 1976, p.136.
NOW Talladinium? Originally Wetzeliella, subsequently Kisselevia?, thirdly Charlesdowniea, fourthly (and now) Talladinium? Questionable assignment: Lentin and Williams (1976, p.136).
Taxonomic senior synonym: Wetzeliella (as Hystrichosphaeridium) articulata, according to Pastiels (1948, p.42) — however, this synonymy has not been generally accepted.
Holotype: Eisenack, 1938b, fig.5; Eisenack, 1954b, pl.7, fig.12.
Age: Late Eocene-Early Oligocene.
Original description: Eisenack, 1938, p. 187: Wetzeliella clathrata
Wetzeliella clathrata differs from Wetzeliella articulata in its stronger diamond shape and the balustrade-like fusion of the marginal spines.
Eisenack, 1954, p. 57: Wetzeliella clathrata
Diagnosis: Body flattened, outline more strongly diamond-shaped than in W. articulata, because the "horns" project much less, the smaller antapical horn either indicated as a mere bulge of the margin or totally reduced. The thorns are arranged in rows and form, by the fusion of their ends, characteristical balustrade- like fences, which are most clearly visible along the sides, but also stand on the front and back sides, there delimiting several fields. The area of the transverse furrow is sometimes delimited quite clearly by such balustrades. Capsule oval, located mostly farther from the margin than in W. articulata. Longitudinal not observable.
Dimensions: Holotype: 160:150 µm, capsule 83:81 µm. 11 specimens observed, 134-165 µm long.
Affinities:
Eisenack, 1954, p. 57-58: Wetzeliella clathrata
(annotated) W. clathrata differs from W. articulata in the formation of the balustrade-like fences, and from other related species in the general habit. The body is essentially flatter and more strongly diamond-shaped, resulting from the reduction of the horns. A delimitation of fields by rows of thorns is not present in W. articulata, but clearly observable in W. clathrata.
NOW Talladinium? Originally Wetzeliella, subsequently Kisselevia?, thirdly Charlesdowniea, fourthly (and now) Talladinium? Questionable assignment: Lentin and Williams (1976, p.136).
Taxonomic senior synonym: Wetzeliella (as Hystrichosphaeridium) articulata, according to Pastiels (1948, p.42) — however, this synonymy has not been generally accepted.
Holotype: Eisenack, 1938b, fig.5; Eisenack, 1954b, pl.7, fig.12.
Age: Late Eocene-Early Oligocene.
Original description: Eisenack, 1938, p. 187: Wetzeliella clathrata
Wetzeliella clathrata differs from Wetzeliella articulata in its stronger diamond shape and the balustrade-like fusion of the marginal spines.
Eisenack, 1954, p. 57: Wetzeliella clathrata
Diagnosis: Body flattened, outline more strongly diamond-shaped than in W. articulata, because the "horns" project much less, the smaller antapical horn either indicated as a mere bulge of the margin or totally reduced. The thorns are arranged in rows and form, by the fusion of their ends, characteristical balustrade- like fences, which are most clearly visible along the sides, but also stand on the front and back sides, there delimiting several fields. The area of the transverse furrow is sometimes delimited quite clearly by such balustrades. Capsule oval, located mostly farther from the margin than in W. articulata. Longitudinal not observable.
Dimensions: Holotype: 160:150 µm, capsule 83:81 µm. 11 specimens observed, 134-165 µm long.
Affinities:
Eisenack, 1954, p. 57-58: Wetzeliella clathrata
(annotated) W. clathrata differs from W. articulata in the formation of the balustrade-like fences, and from other related species in the general habit. The body is essentially flatter and more strongly diamond-shaped, resulting from the reduction of the horns. A delimitation of fields by rows of thorns is not present in W. articulata, but clearly observable in W. clathrata.