(Loose) Schopf, Wilson & Bentall, 1944
Radial, trilete, miospores. Amb including corona rounded triangular to circular. Outline of spore body triangular with rounded apices and concave sides. Trilete mark distinct, sutures simple or with weak narrow low labra; straight, extending almost to equatorial margin. Well-developed corona composed of setae up to 1 µm wide and more or less in full lateral contact throughout their length. Corona attached to exine just proximally of the equatorial margin. Maximum width of corona, including overlap on proximal side, 17–28 µm; occurs in the inter-radial position. In the radial positions the corona may be as narrow as 2 µm and may be attached nearer to the proximal pole so that on compression it may appear to cross the angles of the spore body. Exine moderately thick, laevigate to scabrate, folding rare.
Schopf, Wilson and Bentall, 1944, p. 53, fig. 2.
Smith and Butterworth, 1967, pp. 211–212, pl. 13, figs. 13–14
Equatorial diameter of spore body 50(58)95 µm
Kosanke 1950 is distinguished from R. speciosa
in possessing straight sides, labra, and setae which are discrete and commonly partate. R. magnifica
Kosanke 1950, differs by having broader angles to the spore body and a corona composed of discrete elements.
Pennsylvanian; Bashkirian to Moscovian [Kinderscoutian to Bolsovian] (Smith and Butterworth, 1967, and unpublished information)
MPK 7433 Figure 41a
Argill Shell Bed, Argill Beck, Stainmore, Cumbria, England; Bashkirian [uppermost Langsettian], RA Biozone, Sample ASB, Specimen MPK 7433. Strongly concave triangular spore body with well-developed trilete mark, sutures accompanied by low, narrow, thickened labra extending to equator. Exine relatively thick. Corona composed of densely arranged setae, longest in inter-radial region. Corona attached to equatorial portion of proximal surface.
Specimen maximum dimension 94 µm.
MPK 7435 Figure 41b
Passage Group, Diddup Borehole, 7.20 m, Scotland; Bashkirian [earliest Langsettian], SS Biozone, Sample MPA 4578, Specimen MPK 7435
Specimen maximum dimension 52 µm.