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Kalyptea wisemaniae
Kalyptea wisemanniae Stover and Helby, 1987
Holotype: Stover and Helby, 1987, fig.9A
Paratypes: Stover and Helby, 1987
Locus typicus: Carnarvon Basin, Australia
Stratum typicum: Berriasian
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Kalyptea wisemaniae Stover and Helby, 1987a, is elongate, with a long apical and a long antapical horn. Both horns are rounded at their ends.. Autophragm thick, up to 3 µm, smooth to granular but may be rugulate towards the posterior end of the antapical horn. K. wisemaniae is larger and has much longer horns than K. diceras and K. stegasta. It also lacks the solid anterior extension of the apical horn in K. diceras. Size: length of 155-256 µm, apical horn length 35-96 µm, width generally less than 5 µm, antapical horn length 25-56 µm, width 9-17 µm.
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Original description: Stover and Helby, 1987, p. 110
Cysts proximate, elongate spindle-shaped with long, single, apical and antapical horns. Body of the cyst broader laterally than dorsoventrally with discernible inflation on the dorsal surface. Apical horn very long (35-96 Ám), narrow (generally less than 5 Ám over most of its length) tapered markedly anterior of the archeopyle, hollow, and gently rounded at the anterior end. Antapical horn long (25-56 Ám), relatively wide over most of its length (9-17 Ám) hollow, and gently rounded at the posterior end. Autophragm thick (up to 3 Ám on the antapical horn), smooth to granulate over most of the cyst, often rugulate towards the posterior end of the antapical horn. Paratabulation indicated only by the archeopyle; archeopyle intercalary, type I (2a only), and 6-sided: operculum free (although it is in place in a majority of the specimens). Paracingulum and parasulcus not evident.
Measurements. All measurements in microns. B = Barrow-25 (13 specimens). E = Eendracht-1 (12specimens).
B E
Total length 155-256 Ám 168-233 Ám
apical horn length 35-96 Ám 48-80 Ám
antapicalhorn length 25-45 Ám 37-56 Ám
cyst body width 32-56 Ám 30-48 Ám
Affinities:
Stover and Helby, 1987, p. 110: Kalyptea wisemaniae is larger and has much longer horns than K. diceras Cookson & Eisenack 1960 and K. stegasta (Sarjeant) Wiggins 1975. In addition, it lacks the solid anterior extension of the apical horn which characterizes K. diceras. It superficially resembles the acritarch Diplofusa gearlensis Cookson & Eisenack 1960 but is distinguished by its clear dinoflagellate affinities (archeopyle), larger size, asymmetry and single wall layer.
Holotype: Stover and Helby, 1987, fig.9A
Paratypes: Stover and Helby, 1987
Locus typicus: Carnarvon Basin, Australia
Stratum typicum: Berriasian
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Kalyptea wisemaniae Stover and Helby, 1987a, is elongate, with a long apical and a long antapical horn. Both horns are rounded at their ends.. Autophragm thick, up to 3 µm, smooth to granular but may be rugulate towards the posterior end of the antapical horn. K. wisemaniae is larger and has much longer horns than K. diceras and K. stegasta. It also lacks the solid anterior extension of the apical horn in K. diceras. Size: length of 155-256 µm, apical horn length 35-96 µm, width generally less than 5 µm, antapical horn length 25-56 µm, width 9-17 µm.
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Original description: Stover and Helby, 1987, p. 110
Cysts proximate, elongate spindle-shaped with long, single, apical and antapical horns. Body of the cyst broader laterally than dorsoventrally with discernible inflation on the dorsal surface. Apical horn very long (35-96 Ám), narrow (generally less than 5 Ám over most of its length) tapered markedly anterior of the archeopyle, hollow, and gently rounded at the anterior end. Antapical horn long (25-56 Ám), relatively wide over most of its length (9-17 Ám) hollow, and gently rounded at the posterior end. Autophragm thick (up to 3 Ám on the antapical horn), smooth to granulate over most of the cyst, often rugulate towards the posterior end of the antapical horn. Paratabulation indicated only by the archeopyle; archeopyle intercalary, type I (2a only), and 6-sided: operculum free (although it is in place in a majority of the specimens). Paracingulum and parasulcus not evident.
Measurements. All measurements in microns. B = Barrow-25 (13 specimens). E = Eendracht-1 (12specimens).
B E
Total length 155-256 Ám 168-233 Ám
apical horn length 35-96 Ám 48-80 Ám
antapicalhorn length 25-45 Ám 37-56 Ám
cyst body width 32-56 Ám 30-48 Ám
Affinities:
Stover and Helby, 1987, p. 110: Kalyptea wisemaniae is larger and has much longer horns than K. diceras Cookson & Eisenack 1960 and K. stegasta (Sarjeant) Wiggins 1975. In addition, it lacks the solid anterior extension of the apical horn which characterizes K. diceras. It superficially resembles the acritarch Diplofusa gearlensis Cookson & Eisenack 1960 but is distinguished by its clear dinoflagellate affinities (archeopyle), larger size, asymmetry and single wall layer.