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2 Systematic Descriptions
Fig. 2.34 Two focal levels of Microbaculispora micronodosa
Fig. 2.35 a Laesurae accompanied by folds. b Coarse micro-reticulate pattern made by bases of
projections. b Prominent sculpture seen in optical section
Description: Trilete. Amb triangular; sides convex. Laesurae long, extending to
equatorial margin, followed by broad sinuous folds. Exine thick on distal face,
thinning towards proximal face; contact area thin and devoid of sculpture. Sculpture consists of densely spaced rod-like elements. These are uniform in shape
and size, forming a perfect mini-reticulate pattern in surface view (Fig. 2.35).
Sculptural elements up to 4 µ in height.
Dimensions: 54–90 µ (50 specimens measured). Microbaculispora villosa is distinguished from M. trisina mainly by the length of its processes which in the
former exceed 1.5 µ.
Microbaculispora tentula (Tiwari 1965) (Fig. 2.36).
Occurrence: Lower Permian (Sakmarian) of Collie-Muja Basin, Sue No. 1 bore.
Description: Trilete. Amb triangular, sides straight to slightly concave. Laesurae
long, extending to equatorial margin of spore. Broad sinuous folds accompanying