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Endoscrinium campanula
Endoscrinium campanula (Gocht, 1959) Vozzhennikova, 1967
Originally Scriniodinium, subsequently (and now) Endoscrinium, thirdly Scriniodinium?.
Taxonomic junior synonym: Gonyaulacysta fragosa, according to Harker and Sarjeant (1975, p.224) and Brideaux and McIntyre (1975, p.33).
Stover and Evitt, 1978, and Jan du Chene et al., 1986, questionably retained this species in Scriniodinium Klement, 1957. Lentin and Williams, 1981, 1989, retained it in Endoscrinium.
Riding and Fensome (2003, p.13-14) retained this species without question in Scriniodinium.
Holotype: Gocht, 1959, pl.5, fig1; Jan du Chene et al., 1986, pl.110, fig.1-5; Fensome et al., 1991, figs.1-3-p.593, figs.1-5 - p.597
Paratype: Gocht, 1959
Locus typicus: R³hlertwist 2 Well, Emsland, NW Germany
Stratum typicum: Hauterivian
Translation Gocht, 1959: LPP
Translation Vozhennikova, 1967: Lees in Sarjeant, 1971, p. 272-273
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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.
Endoscrinium campanula (Gocht, 1959) Vozzhennikova, 1967. Circumcavate. Epicyst helmet-shaped. Apical horn short, truncated. Hypocyst somewhat longer, rounded or slightly truncated at the antapex. The dorsal surface shows dextral torsion. Size: overall length 85-100 µm, width 74-91 µm. Holotype, pericyst length ca 104 µm, width 91 µm, length of apical horn, from the margin of the endocyst, 16 µm, dimensions of endocyst 74 x 72 µm.
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Original description: Gocht, 1959, p. 61: Scriniodinium campanula
Outer shell flattened, tabulated, with an almost straight girdle and a distinct longitudinal furrow. Epitheca helmet-shaped. Apical horn short, blunt and sligthly sagged, resulting in a bell-shaped form on both sides of the shell. Hypotheca slightly longer, rounded or slightly blunt at the pole. Inner body ovoidal and laterally separated from the main body.
Dimensions: lenght: 85-100 Ám; width: 74-91 Ám.
Vozzhennikova 1967, p. 175: Endoscrinium campanula.
Theca thickwalled and the shape of an equilateral rhombus. The internal body oval,
quadrangular. Transverse furrow equatorial, its margin provided with with folds which extend into the cavity of the furrow. Epitheca somewhat smaller than hypotheca, horseshoe-shaped with a small apical process. Hypotheca has the form of a large triangle with a rounded antapex. The dorsal side of the hypotheca consists of two large plates separated from each other by a high crest extending from the transverse furrow to the end of the hypotheca. Dorsal part of epitheca consists of anterior equatorial plates 2, 3 and 4; these extend from the transverse furrow to the boundaries of the apical plates. The high crests give the dorsal side of the theca a more convex form. The pylome often assumes the position of plate 3np. The number and postion of the apical plates, the plates on the ventral side etc. remain indefinite because of damage to the surface of the theca.
Dimensions: length: 90.0-92.7 Ám; breadth: 80.0-84.4 Ám; width of processes 11.2-16.8 Ám; length inner body: 58.0-61.8 Ám; breadth inner body: 57.0-59.0 Ám; length apical horn: 10.5-11.2 Ám.
Affinities:
Gocht 1959, p. 62
Scriniodinium campanula is related to S. luridum (Deflandre), but it differs from the Jurassic species in size, in shape of the hypotheca and in possession of longitudinal plates.
Originally Scriniodinium, subsequently (and now) Endoscrinium, thirdly Scriniodinium?.
Taxonomic junior synonym: Gonyaulacysta fragosa, according to Harker and Sarjeant (1975, p.224) and Brideaux and McIntyre (1975, p.33).
Stover and Evitt, 1978, and Jan du Chene et al., 1986, questionably retained this species in Scriniodinium Klement, 1957. Lentin and Williams, 1981, 1989, retained it in Endoscrinium.
Riding and Fensome (2003, p.13-14) retained this species without question in Scriniodinium.
Holotype: Gocht, 1959, pl.5, fig1; Jan du Chene et al., 1986, pl.110, fig.1-5; Fensome et al., 1991, figs.1-3-p.593, figs.1-5 - p.597
Paratype: Gocht, 1959
Locus typicus: R³hlertwist 2 Well, Emsland, NW Germany
Stratum typicum: Hauterivian
Translation Gocht, 1959: LPP
Translation Vozhennikova, 1967: Lees in Sarjeant, 1971, p. 272-273
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Endoscrinium campanula (Gocht, 1959) Vozzhennikova, 1967. Circumcavate. Epicyst helmet-shaped. Apical horn short, truncated. Hypocyst somewhat longer, rounded or slightly truncated at the antapex. The dorsal surface shows dextral torsion. Size: overall length 85-100 µm, width 74-91 µm. Holotype, pericyst length ca 104 µm, width 91 µm, length of apical horn, from the margin of the endocyst, 16 µm, dimensions of endocyst 74 x 72 µm.
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Original description: Gocht, 1959, p. 61: Scriniodinium campanula
Outer shell flattened, tabulated, with an almost straight girdle and a distinct longitudinal furrow. Epitheca helmet-shaped. Apical horn short, blunt and sligthly sagged, resulting in a bell-shaped form on both sides of the shell. Hypotheca slightly longer, rounded or slightly blunt at the pole. Inner body ovoidal and laterally separated from the main body.
Dimensions: lenght: 85-100 Ám; width: 74-91 Ám.
Vozzhennikova 1967, p. 175: Endoscrinium campanula.
Theca thickwalled and the shape of an equilateral rhombus. The internal body oval,
quadrangular. Transverse furrow equatorial, its margin provided with with folds which extend into the cavity of the furrow. Epitheca somewhat smaller than hypotheca, horseshoe-shaped with a small apical process. Hypotheca has the form of a large triangle with a rounded antapex. The dorsal side of the hypotheca consists of two large plates separated from each other by a high crest extending from the transverse furrow to the end of the hypotheca. Dorsal part of epitheca consists of anterior equatorial plates 2, 3 and 4; these extend from the transverse furrow to the boundaries of the apical plates. The high crests give the dorsal side of the theca a more convex form. The pylome often assumes the position of plate 3np. The number and postion of the apical plates, the plates on the ventral side etc. remain indefinite because of damage to the surface of the theca.
Dimensions: length: 90.0-92.7 Ám; breadth: 80.0-84.4 Ám; width of processes 11.2-16.8 Ám; length inner body: 58.0-61.8 Ám; breadth inner body: 57.0-59.0 Ám; length apical horn: 10.5-11.2 Ám.
Affinities:
Gocht 1959, p. 62
Scriniodinium campanula is related to S. luridum (Deflandre), but it differs from the Jurassic species in size, in shape of the hypotheca and in possession of longitudinal plates.