Taxonomy Online - Carboniferous spores part I - Species details


Species name
Grandispora lupata Turnau, 1975

Description
Radial, trilete camerate miospores. Amb rounded triangular with convex sides and rounded apices. Trilete mark distinct, sutures straight, accompanied by elevated flexuous folds of the exoexine which extend, decreasing in height, towards the equatorial margin of spore. Exoexine separated from intexine at least in the equatorial region and over part of distal surface. Intexine thin, forming rounded triangular inner body occupying up to three-quarters of the total spore diameter. Exoexine finely infrapunctate, relatively thick over distal surface and equatorial portion of proximal surface, thinner over contact areas which occupy approximately two-thirds of spore radius. Ornamentation of exoexine confined to the distal surface and consists of spinae with bulbous bases and sharply pointed terminations. Elements up to 2.5 µm high and 1.5 µm in basal diameter, varying between 1.5 and 9 µm (commonly 5 µm) apart.

Other descriptions
Turnau, 1975, pp. 517–518, pl. 6, figs. 1–3

Size
Overall equatorial diameter 64(75)95 µm

Remarks
Grandispora echinata Hacquebard 1957, is distinguished by possessing a thinner exoexine which is of uniform thickness, and a more obvious intexine forming the inner body. Grandispora gracilis (Kedo) Streel in Becker et al. 1974 is smaller, has a thinner exoexine and possesses a finer ornamentation. Grandispora cf. uncata (Hacquebard) Playford 1971, is smaller and has a relatively coarser but less densely distributed ornamentation.

Range
Devonian; Famennian (from Higgs et al., 2000)

Images

MPK 7286 MPK 7286 Figure 19a
Babilon Borehole 2626.6 m, west Pomerania, Poland; Late Devonian, Strunian (Tn lA), Lu Biozone (Turnau, 1978), Sample MPA 33203, Specimen MPK 7286. Rounded triangular miospore consisting of indistinct spore body surrounded by exoexine forming ? flange which appears thickened in the equatorial region. Trilete mark distinct, extending to margin of inner body and accompanied by narrow elevated exoexinal folds that taper towards the margin. Distal equatorial exoexine ornamented with small sharply pointed spinae surmounting small, bulbous bases. Ornament projects at equatorial margin. Specimen maximum dimension 64 µm.


MPK 7292 MPK 7292 Figure 19b
Babilon Borehole, 2624.6 m, west Pomerania, Poland; Late Devonian, Strunian (Tn lA), Lu Biozone (Turnau 1978), Sample MPA 33203, Specimen MPK 7292. Proximal focus showing indistinct inner body, trilete sutures accompanied by elevated exoexinal folds that extend almost to equator. Proximal surface laevigate. Specimen maximum dimension 75 µm.