Back
Pareodinia mutabilis
Pareodinia mutabilis Riley in Fisher and Riley, 1980, p.324–325, pl.3, figs.1–3. Emendation: Below, 1990, p.49, as Gochteodinia mutabilis.
Now Gochteodinia. Originally Pareodinia, subsequently (and now) Gochteodinia. This species name was a nomen nudum in Fisher and Riley, 1976.
Holotype: Gitmez and Sarjeant, 1972, pl.11, fig.1 (as Imbatodinium cf. villosum Vozzhennikova, 1967)
Locus typicus: Kimmeridge Clay, Dorset, England
Stratum typicum: Volgian
Original diagnosis: Riley, 1980, p. 324
Cyst elongate ovoidal, bearing a strong apical horn, typically terminating in a thread-like apicular structure of variable length. Epitract and hypotract approximately equal with little or no cingular trace. Reflected paratabulation other than cingular trace, archaeopyle outline and operculum not evident. Archaeopyle intercalary, type 2I. Cyst wall smooth to densely granular, bearing numerous, irregularly distributed processes of variable form: slender, short, simple spine-like projections to very irregularly knobbly and frequently branched or capitate structures.
Dimensions: Overall length 50-87 µm; breadth: 25-43 µm; length of apical horn: 11 µm; length of apical thread: 3-11 µm; length of surface processes: 2-8 µm.
Now Gochteodinia. Originally Pareodinia, subsequently (and now) Gochteodinia. This species name was a nomen nudum in Fisher and Riley, 1976.
Holotype: Gitmez and Sarjeant, 1972, pl.11, fig.1 (as Imbatodinium cf. villosum Vozzhennikova, 1967)
Locus typicus: Kimmeridge Clay, Dorset, England
Stratum typicum: Volgian
Original diagnosis: Riley, 1980, p. 324
Cyst elongate ovoidal, bearing a strong apical horn, typically terminating in a thread-like apicular structure of variable length. Epitract and hypotract approximately equal with little or no cingular trace. Reflected paratabulation other than cingular trace, archaeopyle outline and operculum not evident. Archaeopyle intercalary, type 2I. Cyst wall smooth to densely granular, bearing numerous, irregularly distributed processes of variable form: slender, short, simple spine-like projections to very irregularly knobbly and frequently branched or capitate structures.
Dimensions: Overall length 50-87 µm; breadth: 25-43 µm; length of apical horn: 11 µm; length of apical thread: 3-11 µm; length of surface processes: 2-8 µm.