2 Systematic Descriptions
51
Fig. 2.33 a Fine microgranulate structure, notice detached ektexine. b Folds following laesurae
Anapiculatisporites lacks crested laesurae and thinning of proximal exine characteristic of Microbaculispora. Furthermore, a very regular sculpture characterises
Microbaculispora.
Microbaculispora trisina (Balme and Hennelly 1956) New Comb (Fig. 2.33).
Occurrence: Upper Permian of Collie–Muja Basin. Sue No.1 Bore.
Description: Amb triangular, convex sides. Trilete; laesurse clearly outlined,
extending to equatorial margin of spore. Undulating folds following tetrad rays.
Proximal face pyramidal. Distal face convex. Exine about 2 µ thick on distal face,
thinning out towards proximal face. Sculpture granulate; grana vary in height from
≤1 to 1 µ, closely packed forming a regular pattern in surface view, flattening
towards proximal face, absent from contact area.
Dimensions: 50–80 µ (20 specimens measured).
Remarks and comparisons: M. trisina is distinguished mainly by the size of its
sculptural elements, which are grana not exceeding 1 µ in diameter and height.
M. trisina reported and described by Backhouse (1991) from Collie Basin, and
from the Karroo Basin by Anderson (1977).
Microbaculispora micronodosa (Balme and Hennelly 1956) (Fig. 2.34).
Occurrence: Upper Permian of Collie–Muja Basins, Sue No.1 bore hole.
Description: Trilete. Sinuous folds accompanying tetrad scar, signifying ridges
before compression. Amb triangular with convex sides. Proximal face pyramidal
and devoid of sculpture. Distal face convex and sculptures: Sculpture of exine
granulate; grana about 1 µ in diameter and 1–2 µ in height, diminishing in size
on the proximal face and absent altogether over contact area.
Dimensions: 36–57 µ (15 specimens measured).
Remarks and comparisons: M. micronodosus is distinguished from M. trisina by
possessing larger sculptural elements relative to its overall size.
Microbaculispora villosa (Balme and Hennelly 1956; Bharadwaj 1962)
(Fig. 2.35).
Occurrence: Upper Permian of Collie–Muja Basins. Sue No.1 bore hole.
51
Fig. 2.33 a Fine microgranulate structure, notice detached ektexine. b Folds following laesurae
Anapiculatisporites lacks crested laesurae and thinning of proximal exine characteristic of Microbaculispora. Furthermore, a very regular sculpture characterises
Microbaculispora.
Microbaculispora trisina (Balme and Hennelly 1956) New Comb (Fig. 2.33).
Occurrence: Upper Permian of Collie–Muja Basin. Sue No.1 Bore.
Description: Amb triangular, convex sides. Trilete; laesurse clearly outlined,
extending to equatorial margin of spore. Undulating folds following tetrad rays.
Proximal face pyramidal. Distal face convex. Exine about 2 µ thick on distal face,
thinning out towards proximal face. Sculpture granulate; grana vary in height from
≤1 to 1 µ, closely packed forming a regular pattern in surface view, flattening
towards proximal face, absent from contact area.
Dimensions: 50–80 µ (20 specimens measured).
Remarks and comparisons: M. trisina is distinguished mainly by the size of its
sculptural elements, which are grana not exceeding 1 µ in diameter and height.
M. trisina reported and described by Backhouse (1991) from Collie Basin, and
from the Karroo Basin by Anderson (1977).
Microbaculispora micronodosa (Balme and Hennelly 1956) (Fig. 2.34).
Occurrence: Upper Permian of Collie–Muja Basins, Sue No.1 bore hole.
Description: Trilete. Sinuous folds accompanying tetrad scar, signifying ridges
before compression. Amb triangular with convex sides. Proximal face pyramidal
and devoid of sculpture. Distal face convex and sculptures: Sculpture of exine
granulate; grana about 1 µ in diameter and 1–2 µ in height, diminishing in size
on the proximal face and absent altogether over contact area.
Dimensions: 36–57 µ (15 specimens measured).
Remarks and comparisons: M. micronodosus is distinguished from M. trisina by
possessing larger sculptural elements relative to its overall size.
Microbaculispora villosa (Balme and Hennelly 1956; Bharadwaj 1962)
(Fig. 2.35).
Occurrence: Upper Permian of Collie–Muja Basins. Sue No.1 bore hole.