Taxonomy Online - Carboniferous spores part I - Species details


Species name
Spelaeotriletes owensi Loboziak & Alpern, 1978

Description
Radial, trilete, camerate miospores. Amb rounded triangular to subcircular. Trilete mark distinct, sutures obscured by elevated sinuous folds of the exoexine which extend, decreasing in height, to the equatorial margin. Well-defined inner body formed by thin intexine; outline circular to subcircular. Equatorial margin of exoexine together with that part of the proximal surface which is invaginated opposite the ends of the trilete sutures, thickened to form equatorial border. Equatorial border and distal surface ornamented with fine vermiculate or reticulate ridges. Ridges surmounted by small spinae. Exoexine of contact areas laevigate.

Other descriptions
Loboziak and Alpern, 1978, pp. 60–61, pl. 2, figs. 15–17

Size
Equatorial diameter 60(77)109 µm. Diameter of inner body 32(46) 68 µm

Remarks
This species is readily distinguished from all other species assigned to the genus Spelaeotriletes on the basis of possessing a well-defined inner body, by having a thickened equatorial exoexinal border which extends onto the proximal surface in the radial positions, and by having a fine vermiculate/reticulate ornament.

Range
Mississippian; Visean to early Serpukhovian (Loboziak and Clayton, 1988)

Images

MPK 7245 MPK 7245 Figure 55a
North-east Libya; Mississippian, late Visean, SG Biozone, OA Sub-Biozone (Loboziak and Clayton, 1988), Sample 6314, Specimen MPK 7245. Sub-circular camerate miospore with well-defined subcircular inner body. Trilete mark distinct and accompanied by elevated folds of exoexine which extend almost to the equatorial margin. Elevated folds accompanying trilete mark merge into the equatorial margin. Exoexine ornament finely reticulate to vermiculate. Muri surmounted by small coni. Specimen maximum dimension 82 µm.


MPK 7248 MPK 7248 Figure 55b
North-east Libya; Mississippian, late Visean, SG Biozone, OA Sub-Biozone (Loboziak and Clayton, 1988), Sample 6314, Specimen MPK 7248. Specimen maximum dimension 88 µm.