(Bharadwaj & Venkatachala) Williams in Neves et al., 1973
Radial, trilete, camerate miospores. Amb circular, subcircular or rounded triangular. Trilete mark distinct or indistinct, sutures extending to margin of intexine; straight, simple or accompanied by elevated narrow folds or labra, extending to or almost to the equatorial margin where they fuse laterally with the curvaturae. Intexine sometimes clearly separated from the exoexine, otherwise closely adpressed. Intexine may form indistinct inner body occupying at least four-fifths of the spore diameter. Degree of cameration variable but exoexine probably attached to intexine on both proximal and distal surfaces. Exoexine relatively thick, strongly infrapunctate.
Bharadwaj and Venkatachala, 1961, p. 39, pl. 10, figs. 142–164.
Neves et al., 1973, p. 41, pl. 2, figs. 11–13
Overall equatorial diameter 40(53)75 μm
Neves et al., 1973 differs by possessing an exoexinal ornament of small spinae, bacula, coni and grana.
Mississippian; Tournaisian; PC to CM biozones (Higgs et al., 1988)
MPK 7671 Figure 8a
Pinskey Gill Beds, Wygarth Gill Borehole, Ravenstonedale, Cumbria, England; Mississippian, Tournaisian, CM Biozone, Sample MPA 302, Specimen MPK 7671. Miospore with circular amb and closely adpressed intexine and exoexine. Trilete suture simple, extending approximately half of spore radius.
Specimen maximum dimension 61 μm.
MPK 7672 Figure 8b
Pinskey Gill Beds, Wygarth Gill Borehole, Ravenstonedale, Cumbria, England; Mississippian, Tournaisian, CM Biozone, Sample MPA 292, Specimen MPK 7672. Clear evidence of separation of exoexine from intexine in the equatorial plane. Trilete mark open, suture simple extending approximately three-quarters of the radius. Exoexine finely infrapunctate. Minor secondary folds.
Specimen maximum dimension 58 μm.