(Waltz) Hoffmeister, Staplin & Malloy, 1955
Radial, trilete, camerate miospores with a bilaterally symmetrical appearance due to the presence of an elliptical saccus-like exoexinal structure. Amb oval but occasionally sub-circular. Trilete mark distinct to indistinct; sutures straight, extending up to two-thirds of spore body radius, sutures often of unequal length on individual specimens. Intexine forms circular to oval inner body; long axis of inner body rarely orientated obliquely to the long axis of the miospore. Exoexine infrapunctate with a narrow dark zone often occurring where the saccus overlies the equatorial margin of the spore body. Radial compression folds infrequently developed.
Sullivan and Marshall, 1966, pp. 274–275, pl. 3, figs. 13–14.
Smith and Butterworth, 1967, pp. 274–275, pl. 23, fig. 1
Long axis dimension 76(94)114 µm.
Diameter of inner body 46(54)70 µm
Kosanke 1950 is distinguished from S. campyloptera
by its more rounded equatorial outline and its proportionately larger spore body. The long axis of the inner body of S. campyloptera
is not normally orientated obliquely to the long axis of the miospore, a characteristic which is typical of S. ocellata
(Horst) Potonié & Kremp 1956. Intermediate forms may occur but it is not known if these represent morphological intergradations or are the result of compressional effects.
Mississipian; Visean to Serpukhovian [Arnsbergian]; TC to SO biozones (Clayton et al. 1977, and Varker et al., 1990)
MPK 7137 Figure 48a
Shales below Hurlet Limestone, Hurlet Borehole, 181.35 m, Strathclyde, Scotland; Visean, VF Biozone, Sample MPA 9165, Specimen MPK 7137. Equatorial outline ovoid but long axis of ovoid inner body at right angles to long axis of miospore. Trilete mark distinct, sutures simple, straight; extending up to two-thirds of inner body radius. Note darkened zone where exoexine overlaps inner body.
Specimen maximum dimension 89 µm.
MPK 7145 Figure 48b
Shales below Hurlet Limestone, Hurlet Borehole, 181.35 m, Strathclyde, Scotland; Visean, VF Biozone, Sample MPA 9165, Specimen MPK 7145.
Specimen maximum dimension 86 µm.