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Dinaurelia
From Fensome et al., 2019:
Dinaurelia, Wille and Gocht, 1985, p.129–131,133–135.
Taxonomic senior synonym: Rosswangia, according to Below (1987b, p.29) -- however, Stover and Williams (1987, p.79) retained Dinaurelia. Type: Wille and Gocht, 1985, pl.1, figs.1a–d, as Dinaurelia pyrgos.
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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.
Taxonomic senior synonym: Rosswangia, according to Below (1987b, p.29) -- however, Stover and Williams (1987, p.79) retained Dinaurelia. Type: Wille and Gocht, 1985, pl.1, figs.1a–d, as Dinaurelia pyrgos.
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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.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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.