Back
Kisselevia ornata subsp. ornata
Kisselevia ornata subsp. ornata
Autonym. Now redundant.
Taxonomic junior synonym: Kisselevia ornata forma reticulata, according to Lentin and Vozzhennikova (1989, p.221,223).
Holotype: Vozzhennikova, 1967, pl.44, fig.6, lost according to Lentin and Vozzhennikova (1989, p.223).
Lectotype: Vozzhennikova, 1967, pl.44, fig.1 (as holotype of Kisselevia ornata forma reticulata); Lentin and Vozzhennikova, 1989, pl.1, figs.1-2; Lentin and Vozzhennikova, 1990, pl.9, fig.1; designated by Lentin and Vozzhennikova (1989, p.223).
Locus typicus: Tara, W Siberia, Russia
Translation Vozzhenikova, 1967: Lees in Sarjeant, 1971, p. 157
Original description: Vozzhennikova (1960) 1967, p. 103-104
Theca divided by the transverse furrow into two almost equal parts. Epitheca triangular with a small apical outgrowth. Hypotheca trapeziform with a short, acutely pointed antapical horn. Lateral angles slightly drawn out, or not drawn out. Thecal sculpture reticulate or reticulate spinous. Thecal armour divided into plates (fields) by colored sutures, which permit some recognition of the shape and position of the plates but do not allow an exact assessment of their number. The plate formula is suggested tentatively as: on the epitheca, na + 3cp + (5 6) np; on the hypotheca, (5?) zd + 2cp' + na'. The pylome takes the place of the middle intermediate plate. Transverse furrow equatorial and approximately annulate although its ends are separated from each other by a short distance. The central field occurs on the hypotheca but does not extend to the antapex. It corresponds with the position of the longitudinal furrow. Pylome trapeziform.
Original diagnosis: As for the species with following additions:
Thecal surface with reticulate-spinous sculpturing, the angles of the honeycomb-like cells bearing short spines which are also developed on the sides.
Dimensions: Holotype length of theca 108 Ám, breadth 97,2 Ám, width of transverse furrow 5.4 Ám. In other specimens length of body 102.5 - 121.0 Ám, breadth 94.5 - 120 Ám, width of transverse furrow 5.4 - 8.1 Ám.
Autonym. Now redundant.
Taxonomic junior synonym: Kisselevia ornata forma reticulata, according to Lentin and Vozzhennikova (1989, p.221,223).
Holotype: Vozzhennikova, 1967, pl.44, fig.6, lost according to Lentin and Vozzhennikova (1989, p.223).
Lectotype: Vozzhennikova, 1967, pl.44, fig.1 (as holotype of Kisselevia ornata forma reticulata); Lentin and Vozzhennikova, 1989, pl.1, figs.1-2; Lentin and Vozzhennikova, 1990, pl.9, fig.1; designated by Lentin and Vozzhennikova (1989, p.223).
Locus typicus: Tara, W Siberia, Russia
Translation Vozzhenikova, 1967: Lees in Sarjeant, 1971, p. 157
Original description: Vozzhennikova (1960) 1967, p. 103-104
Theca divided by the transverse furrow into two almost equal parts. Epitheca triangular with a small apical outgrowth. Hypotheca trapeziform with a short, acutely pointed antapical horn. Lateral angles slightly drawn out, or not drawn out. Thecal sculpture reticulate or reticulate spinous. Thecal armour divided into plates (fields) by colored sutures, which permit some recognition of the shape and position of the plates but do not allow an exact assessment of their number. The plate formula is suggested tentatively as: on the epitheca, na + 3cp + (5 6) np; on the hypotheca, (5?) zd + 2cp' + na'. The pylome takes the place of the middle intermediate plate. Transverse furrow equatorial and approximately annulate although its ends are separated from each other by a short distance. The central field occurs on the hypotheca but does not extend to the antapex. It corresponds with the position of the longitudinal furrow. Pylome trapeziform.
Original diagnosis: As for the species with following additions:
Thecal surface with reticulate-spinous sculpturing, the angles of the honeycomb-like cells bearing short spines which are also developed on the sides.
Dimensions: Holotype length of theca 108 Ám, breadth 97,2 Ám, width of transverse furrow 5.4 Ám. In other specimens length of body 102.5 - 121.0 Ám, breadth 94.5 - 120 Ám, width of transverse furrow 5.4 - 8.1 Ám.