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Thalassiphora patula
From Fensome et al., 2019:
Thalassiphora patula (Williams and Downie, 1966c, p.217–218, pl.24, figs.1–2; text-fig.58) Stover and Evitt, 1978, p.195.
Holotype: Williams and Downie, 1966c, pl.24, fig.2; text-fig.58.
Originally Adnatosphaeridium?, subsequently (and now) Thalassiphora.
Taxonomic senior synonym: Pterospermopsis (as and now Thalassiphora) pelagica, according to Benedek and Gocht (1981, p.59) — however, Lentin and Williams (1985, p.354) retained Thalassiphora patula.
Taxonomic junior synonym: Subathua sahnii, according to Stover and Williams (1987, p.207) and Lentin and Williams (1989, p.354). Bujak et al. (1980, p.36) also proposed this combination.
Locus typicus: London Clay, Enborne, England
Stratum typicum: Early Eocene
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Original diagnosis: Williams and Downie, 1966, p. 217: Adnatosphaeridium patulum
Sub-spherical central body with fibrous wall up to 1Á thick, composed of endocoel and pericoel. Processes intratabular open, flared, with fibrous walls; one per plate. Adjacent processes united distally. Archaeopyle haplotabular.
Dimensions: Holotype: diameter of central body 75 by 80 Ám. Length of processes up to 37 Ám. Observed range: diameter of central body 75-95 Ám. Length of processes up to 37 Ám.
Original description: Williams and Downie, 1966, p. 218: Adnatosphaeridium patulum
A. patulm has a quadrate archaeopyle resulting from the loss of a single plate. The archaeopyle is surrounded by six processes in the holotype; these may be precingular but until more specimens are studied definite conclusions cannot be drawn. The processes are considerably broader distally than proximally and have undulose margins. Distal margins of adj acent processes are united. The fibres of the process walls are haphazard in orientation. The walls often appear perforate and this may in part be due to differential staining. The central body is medium brown, the processes tranparent, yellowish green.
Affinities:
Williams and Downie, 1966, p. 218: Adnatosphaeridium patulum
The processes readily distinguish ?A. patulum from other described species. Because of the uncertainty with regard to the type of archaeopyle and its shape, the species is tentatively placed in Adnatosphaeuidium.
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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.
Thalassiphora patula (Williams and Downie, 1966c) Stover and Evitt, 1978. Thalassiphora patula has a subspherical central body with fibrous wall up to 1 µm thick. Periphragm makes contact with endophragm to form “processes”. Archeopyle precingular. Size: diameter of central body 75-95 µm, height of membrane up to 37 µm.
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Thalassiphora patula (Williams and Downie, 1966c, p.217–218, pl.24, figs.1–2; text-fig.58) Stover and Evitt, 1978, p.195.
Holotype: Williams and Downie, 1966c, pl.24, fig.2; text-fig.58.
Originally Adnatosphaeridium?, subsequently (and now) Thalassiphora.
Taxonomic senior synonym: Pterospermopsis (as and now Thalassiphora) pelagica, according to Benedek and Gocht (1981, p.59) — however, Lentin and Williams (1985, p.354) retained Thalassiphora patula.
Taxonomic junior synonym: Subathua sahnii, according to Stover and Williams (1987, p.207) and Lentin and Williams (1989, p.354). Bujak et al. (1980, p.36) also proposed this combination.
Locus typicus: London Clay, Enborne, England
Stratum typicum: Early Eocene
---------------------------------------------------------------------------------------------------
Original diagnosis: Williams and Downie, 1966, p. 217: Adnatosphaeridium patulum
Sub-spherical central body with fibrous wall up to 1Á thick, composed of endocoel and pericoel. Processes intratabular open, flared, with fibrous walls; one per plate. Adjacent processes united distally. Archaeopyle haplotabular.
Dimensions: Holotype: diameter of central body 75 by 80 Ám. Length of processes up to 37 Ám. Observed range: diameter of central body 75-95 Ám. Length of processes up to 37 Ám.
Original description: Williams and Downie, 1966, p. 218: Adnatosphaeridium patulum
A. patulm has a quadrate archaeopyle resulting from the loss of a single plate. The archaeopyle is surrounded by six processes in the holotype; these may be precingular but until more specimens are studied definite conclusions cannot be drawn. The processes are considerably broader distally than proximally and have undulose margins. Distal margins of adj acent processes are united. The fibres of the process walls are haphazard in orientation. The walls often appear perforate and this may in part be due to differential staining. The central body is medium brown, the processes tranparent, yellowish green.
Affinities:
Williams and Downie, 1966, p. 218: Adnatosphaeridium patulum
The processes readily distinguish ?A. patulum from other described species. Because of the uncertainty with regard to the type of archaeopyle and its shape, the species is tentatively placed in Adnatosphaeuidium.
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Thalassiphora patula (Williams and Downie, 1966c) Stover and Evitt, 1978. Thalassiphora patula has a subspherical central body with fibrous wall up to 1 µm thick. Periphragm makes contact with endophragm to form “processes”. Archeopyle precingular. Size: diameter of central body 75-95 µm, height of membrane up to 37 µm.
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