Taxonomy Online - Carboniferous spores part I - Species details


Species name
Tripartites vetustus Schemel, 1950

Description
Radial, trilete, miospores. Amb triangular, sides slightly to strongly concave, apices rounded or truncated. Trilete mark distinct; sutures straight simple or accompanied by low narrow labra extending within a very short distance of the equatorial margin. Exine extended laterally in the equatorial plane to form well-developed auriculae in the radial positions, inter-radial connections between auriculae reduced or absent. Distal surface of auriculae plicated; remainder of exine laevigate.

Other descriptions
Schemel, 1950, p. 243, pl. 40, fig. 11

Size
Overall equatorial diameter 30(42)50 µm

Range
Mississippian; late Visean to early Serpukhovian [early Arnsbergian], VF to TK biozones (Clayton et al., 1977, Owens et al., 1977)

Images

MPK 7555 MPK 7555 Figure 59a
Shales below Hurlet Limestone, Hurlet Borehole 85.50 m, Scotland; Visean, VF Biozone, Sample MPA 9155, Specimen MPK 7555. Specimen with slightly concave inter-radial margins and rounded apices. Well-developed plicated auriculae present at radial margins with no obvious inter-radial thickenings. Specimen maximum dimension 39 µm.


MPK 7556 MPK 7556 Figure 59b
Shales below Faraday House Sill, Argill Beck, Stainmore, Cumbria, England; Serpukhovian [Pendleian], NC Biozone, Sample LCS, Specimen MPK 7556. Simple trilete mark with indication of minor labra development; sutures extend more than three-quarters of spore radius. Radial margins bear prominent plicated auriculae that are connected by narrower inter-radial crassitudes. Specimen maximum dimension 47 µm