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Ternia
From Fensome et al., 2019:
Ternia Helby and Stover, 1987a, p.135. Type: Helby and Stover, 1987a, figs.4A–C, as Ternia balmei.
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Original description: [Helby and Stover, 1987]:
Synopsis:
Cysts proximochorate, body longitudinally elongate, outline subcircular to broadly elliptical in apical-antapical view, subquadrate with rounded corners in lateral view; extending outward from the anterior subapical and ventral surfaces are relatively widely spaced processes which support paired, continuous trabeculae; each pair merging posteroventrally into a single trabecula, one on each side of the cyst, supported by a trabecular network projecting outward from the posterior surface; similarly constructed, single or paired, trabecular structure(s) extending along all or part of the dorsal surface; archeopyle at apex, probably apical.
Description:
Shape: Body longitudinally elongate, outline subcircular to broadly elliptical in apical-antapical view, subquadrate with rounded corners in lateral view, and somewhat ovoidal with a flattened apical end in dorsal- ventral view.
Wall relationships: Autophragm only.
Wall features: Local, simple or complexly branched processes and complicated trabecular network; processes arising from the anterior subapical and ventral surfaces supporting either one or both of the paired trabeculae, generally complex trabecular networks projecting from posterior and dorsal surfaces supporting single trabecula; trabecula less commonly supported by a row of relatively simple processes.
Archeopyle: At apex, type unknown, probably apical; free opercula not recognized.
Paratabulation: Not indicated, or possibly expressed by archeopyle some processes could be intratabular, but confirming evidence lacking.
Paracingulum: Paired trabeculae and supporting processes arising from the subapical anterior surface interpreted as representing the paracingulum.
Parasulcus: Paired trabeculae and supporting structures arising from the ventral surface interpreted as delimiting the parasulcus.
Size: Intermediate to large.
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Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Ternia Helby and Stover, 1987a. Diagnosis from Helby and Stover (1987a, p.135). Cysts proximochorate, body longitudinally elongate, outline subcircular to broadly elliptical in apical-antapical view, subquadrate with rounded corners in lateral view; extending outward from the anterior subapical and ventral surfaces are relatively widely spaced processes which support paired, continuous trabeculae; each pair merging posteroventrally into a single trabecula, one on each side of the cyst, supported by a trabecular network projecting outward from the posterior surface; similarly constructed, single or paired, trabecular structure(s) extending along all or part of the dorsal surface; archeopyle at apex, probably apical.
Ternia Helby and Stover, 1987a, p.135. Type: Helby and Stover, 1987a, figs.4A–C, as Ternia balmei.
---------------------------------------------------------------------------------------------------
Original description: [Helby and Stover, 1987]:
Synopsis:
Cysts proximochorate, body longitudinally elongate, outline subcircular to broadly elliptical in apical-antapical view, subquadrate with rounded corners in lateral view; extending outward from the anterior subapical and ventral surfaces are relatively widely spaced processes which support paired, continuous trabeculae; each pair merging posteroventrally into a single trabecula, one on each side of the cyst, supported by a trabecular network projecting outward from the posterior surface; similarly constructed, single or paired, trabecular structure(s) extending along all or part of the dorsal surface; archeopyle at apex, probably apical.
Description:
Shape: Body longitudinally elongate, outline subcircular to broadly elliptical in apical-antapical view, subquadrate with rounded corners in lateral view, and somewhat ovoidal with a flattened apical end in dorsal- ventral view.
Wall relationships: Autophragm only.
Wall features: Local, simple or complexly branched processes and complicated trabecular network; processes arising from the anterior subapical and ventral surfaces supporting either one or both of the paired trabeculae, generally complex trabecular networks projecting from posterior and dorsal surfaces supporting single trabecula; trabecula less commonly supported by a row of relatively simple processes.
Archeopyle: At apex, type unknown, probably apical; free opercula not recognized.
Paratabulation: Not indicated, or possibly expressed by archeopyle some processes could be intratabular, but confirming evidence lacking.
Paracingulum: Paired trabeculae and supporting processes arising from the subapical anterior surface interpreted as representing the paracingulum.
Parasulcus: Paired trabeculae and supporting structures arising from the ventral surface interpreted as delimiting the parasulcus.
Size: Intermediate to large.
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Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Ternia Helby and Stover, 1987a. Diagnosis from Helby and Stover (1987a, p.135). Cysts proximochorate, body longitudinally elongate, outline subcircular to broadly elliptical in apical-antapical view, subquadrate with rounded corners in lateral view; extending outward from the anterior subapical and ventral surfaces are relatively widely spaced processes which support paired, continuous trabeculae; each pair merging posteroventrally into a single trabecula, one on each side of the cyst, supported by a trabecular network projecting outward from the posterior surface; similarly constructed, single or paired, trabecular structure(s) extending along all or part of the dorsal surface; archeopyle at apex, probably apical.