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Dinaurelia
From Williams et al., 2017:
[Dinaurelia, Wille and Gocht, 1985, p. 129-131, 133-135
tax. jr. synonym of Rosswangia, Wille and Gocht, 1985, according to Below, 1987 - Stover and Williams, 1987, retained Dinaurelia as a separate genus.
Type species: Dinaurelia pyrgos, Wille and Gocht, 1985 (pl.1, figs.1a–d)]
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Original description: [Wille and Gocht, 1985]: (Translation: Stover and Williams, 1987, p. 79):
Description:
Several oval cysts of organic substance, inserted one into the other, form a horn-shaped cystocone. The cystocone is uniserial, slightly bent, and its diameter increases toward the distal end. Each single cyst develops an intercalary-apical archeopyle with an adjoining operculum (type [tAtla], after Evitt, 1967) which has six angular lobes. The opercula are arranged one over the other in the same line on the convex side of the cystocone; this results in a uniform orientation of all cysts. The paratabulation of the cysts is expressed only in the crown of the 7 precingular flaps and the correspondingly angular outline of the operculum. Cyst walls are predominantly smooth; the opercula and precingular flaps are often scabrate to granulate.
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Modified description:
Stover and Williams, 1987, p.79:
Synopsis:
Multiple, ellipsoidal to ovoidal cysts arranged in an obligate, uniserial, slightly arcuate cone (cystocone); distally each autocyst greater in diameter than preceding one; paratabulation expressed only on epicyst, formula: 4`, 4a, 7"; archeopyle combined apical and intercalary, type [tAtl]@.
Description:
Shape: Cystocone conical, slightly arcuate; individual cysts ellipsoidal to ovoidal, progressively larger in diameter distally.
Wall relationships: Individual cysts single-layered; cystocones composed of multiple cysts (usually 2 to 5, but may be more); ventral sides of successive cysts aligned along the convex side of cystocone.
Wall features: No parasutural features; autophragm smooth or finely ornamented.
Archeopyle: Combined apical and intercalary, type [tAtl]@, adnate operculum has six marginal and distally camerate paraplates and a narrow isthmus.
Paratabulation: Indicated mainly by shape of archeopyle margin, expressed on epicyst only, formula: 4`, 4a, 7".
Paracingulum: Not indicated.
Parasulcus: Not indicated.
Size: Intermediate, cystocones with more than two cysts about 50 to 90 µm in length.
Affinities:
Dinaurelia differs from Rosswangia Wille and Gocht 1985 in having the individual cysts retained in obligate, uniserial cystocones. Rosswangia has solitary cysts.
[Dinaurelia, Wille and Gocht, 1985, p. 129-131, 133-135
tax. jr. synonym of Rosswangia, Wille and Gocht, 1985, according to Below, 1987 - Stover and Williams, 1987, retained Dinaurelia as a separate genus.
Type species: Dinaurelia pyrgos, Wille and Gocht, 1985 (pl.1, figs.1a–d)]
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Original description: [Wille and Gocht, 1985]: (Translation: Stover and Williams, 1987, p. 79):
Description:
Several oval cysts of organic substance, inserted one into the other, form a horn-shaped cystocone. The cystocone is uniserial, slightly bent, and its diameter increases toward the distal end. Each single cyst develops an intercalary-apical archeopyle with an adjoining operculum (type [tAtla], after Evitt, 1967) which has six angular lobes. The opercula are arranged one over the other in the same line on the convex side of the cystocone; this results in a uniform orientation of all cysts. The paratabulation of the cysts is expressed only in the crown of the 7 precingular flaps and the correspondingly angular outline of the operculum. Cyst walls are predominantly smooth; the opercula and precingular flaps are often scabrate to granulate.
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Modified description:
Stover and Williams, 1987, p.79:
Synopsis:
Multiple, ellipsoidal to ovoidal cysts arranged in an obligate, uniserial, slightly arcuate cone (cystocone); distally each autocyst greater in diameter than preceding one; paratabulation expressed only on epicyst, formula: 4`, 4a, 7"; archeopyle combined apical and intercalary, type [tAtl]@.
Description:
Shape: Cystocone conical, slightly arcuate; individual cysts ellipsoidal to ovoidal, progressively larger in diameter distally.
Wall relationships: Individual cysts single-layered; cystocones composed of multiple cysts (usually 2 to 5, but may be more); ventral sides of successive cysts aligned along the convex side of cystocone.
Wall features: No parasutural features; autophragm smooth or finely ornamented.
Archeopyle: Combined apical and intercalary, type [tAtl]@, adnate operculum has six marginal and distally camerate paraplates and a narrow isthmus.
Paratabulation: Indicated mainly by shape of archeopyle margin, expressed on epicyst only, formula: 4`, 4a, 7".
Paracingulum: Not indicated.
Parasulcus: Not indicated.
Size: Intermediate, cystocones with more than two cysts about 50 to 90 µm in length.
Affinities:
Dinaurelia differs from Rosswangia Wille and Gocht 1985 in having the individual cysts retained in obligate, uniserial cystocones. Rosswangia has solitary cysts.