Taxonomy Online - Carboniferous spores part I - Species details


Species name
Angulisporites splendidus Bhardwaj, 1954

Description
Radial, trilete, camerate miospores. Amb rounded triangular to subcircular or oval. Miospores consist of inner body conformable in outline with equatorial margin, surrounded by exoexinal body with thickened equatorial rim approximately 5 µm wide. Trilete mark distinct, sutures straight, extending at least as far as the margin of the inner body; simple or accompanied by relatively low elevated, flexuous folds of the exoexine that extend decreasing in height to the equatorial margin of spore. Intexine relatively thick; forms inner body which occupies between two-thirds and three-quarters of the spore diameter. Exoexine thicker; extent of separation of exoexine from intexine difficult to ascertain but inner body commonly possesses independent compression folds suggesting separation in, at least, the equatorial region and part of the distal surface. Exoexine has thickened equatorial rim, similar to a cingulum, which occupies up to half the width of exoexinal extension. Exoexine infrapunctate.

Other descriptions
Bhardwaj, 1954, p. 516, text-fig. 4

Size
Overall equatorial diameter 70(83)105 μm. Diameter of inner body 50(64)76 μm

Remarks
The presence of the cingulum-like thickening at the equatorial margin of the exoexinal body distinguishes representatives of this genus from Endosporites.

Range
Late Pennsylvanian to Early Permian; [latest Westphalian D (Asturian) to early Autunian]; VC Biozone (Sánchez de Posada et al., 2002; Clayton et al., 1977)

Images

MPK 7049 MPK 7049 Figure 1a
Sample L. 1349, Naukuieres VIII, Decazeville, Central France; [Stephanian B], ST Biozone, Specimen MPK 7050. Specimen maximum dimension 105 μm.


MPK 7050 MPK 7050 Figure 1b
Sample L. 1349, Naukuieres VIII, Decazeville, Central France; [Stephanian B], ST Biozone, Specimen MPK 7049. Specimen maximum dimension 100 μm.