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Scriniodinium inritibile
Scriniodinium inritibile Riley in Fisher and Riley, 1980
This species name was a nomen nudum in Fisher and Riley, 1976 and Riley, 1979
Holotype: Riley, 1980, pl.2, figs.7,9: Jan du Chene et al., 1986, pl.111, fig.5
Locus typicus: Kimmeridge Clay, Marton, Yorkshire, England
Stratum typicum: Late Kimmeridgian
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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.
Scriniodinium inritibile Riley in Fisher and Riley, 1980. Diagnosis according to Riley in Fisher and Riley (1980, p.322-323), outer membrane thin, close fitting, extending anteriorly to form a blunt, hollow apical horn. Apex of inner body conical to subrounded. Antapex of cyst rounded to somewhat flattened. Plate boundaries feebly indicated. Cingulum weakly indicated, approximately equatorial or the hypotract is slightly larger than the epitract. Inner body wall finely granular, thin; outer membrane finely granular and/ or perforate. S. playfordii is consistently larger and has a surface ornamentation in the form of small meshed reticulum and a wide smooth hyaline outer membrane. S.parvimarginatum is consistently larger and does not have an apical horn. Size overall 65-87 x 54-80 µm, endocyst 62-76 x 54-76 µm.
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Original diagnosis: Riley, 1980, p.322
A species of Scriniodinium, outer membrance thin, close fitting, extending anteriorly to form a blunt, hollow apical horn. Apex of inner body conical to subrounded. Antapex of cyst rounded to somewhat -flattened. Plate boundaries feebly indicated. Cingulum weakly indicated, approximately equatorial, or the hypotract is slightly larger than the epitract. Inner body wall finely granular, thin; outer membrane finely granular and/or perforate.
Dimensions--Holotype: overall length 73 µm, overall breadth 62 µm; inner body length 64 µm, breadth 58 µm. Range: overall dimensions 65-87 x 54-80 µm; inner body 62-76 x 54-76 µm.
Affinities:
Riley, 1980, p.322-323: S. playfordi Cookson and Eisenack differs in being consistently larger and by possessing a surface ornamentation in the form of small meshed reticulum and a wide, smooth, hyaline outer membrane. S. parvimarginatum (Cookson and Eisenack) differs in being consistently larger and by the lack of an apical horn. The specimens recorded by Gitmez (1970) as S. playfordi may, at least in part, be attributable to S. inritibilum.
This species name was a nomen nudum in Fisher and Riley, 1976 and Riley, 1979
Holotype: Riley, 1980, pl.2, figs.7,9: Jan du Chene et al., 1986, pl.111, fig.5
Locus typicus: Kimmeridge Clay, Marton, Yorkshire, England
Stratum typicum: Late Kimmeridgian
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Scriniodinium inritibile Riley in Fisher and Riley, 1980. Diagnosis according to Riley in Fisher and Riley (1980, p.322-323), outer membrane thin, close fitting, extending anteriorly to form a blunt, hollow apical horn. Apex of inner body conical to subrounded. Antapex of cyst rounded to somewhat flattened. Plate boundaries feebly indicated. Cingulum weakly indicated, approximately equatorial or the hypotract is slightly larger than the epitract. Inner body wall finely granular, thin; outer membrane finely granular and/ or perforate. S. playfordii is consistently larger and has a surface ornamentation in the form of small meshed reticulum and a wide smooth hyaline outer membrane. S.parvimarginatum is consistently larger and does not have an apical horn. Size overall 65-87 x 54-80 µm, endocyst 62-76 x 54-76 µm.
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Original diagnosis: Riley, 1980, p.322
A species of Scriniodinium, outer membrance thin, close fitting, extending anteriorly to form a blunt, hollow apical horn. Apex of inner body conical to subrounded. Antapex of cyst rounded to somewhat -flattened. Plate boundaries feebly indicated. Cingulum weakly indicated, approximately equatorial, or the hypotract is slightly larger than the epitract. Inner body wall finely granular, thin; outer membrane finely granular and/or perforate.
Dimensions--Holotype: overall length 73 µm, overall breadth 62 µm; inner body length 64 µm, breadth 58 µm. Range: overall dimensions 65-87 x 54-80 µm; inner body 62-76 x 54-76 µm.
Affinities:
Riley, 1980, p.322-323: S. playfordi Cookson and Eisenack differs in being consistently larger and by possessing a surface ornamentation in the form of small meshed reticulum and a wide, smooth, hyaline outer membrane. S. parvimarginatum (Cookson and Eisenack) differs in being consistently larger and by the lack of an apical horn. The specimens recorded by Gitmez (1970) as S. playfordi may, at least in part, be attributable to S. inritibilum.