46
2 Systematic Descriptions
Fig. 2.27 a Distal face with ring-like thickening. b Proximal face
Occurrence: Widespread in Upper Permian Collie–Muja Basin. Ranges from
Artinskian in the samples examined.
Description: Trilete. Amb triangular, sides often slightly convex. Laesurae clearly
outlined, extending to or almost equatorial margin, often sinuous and accompanied
by folds which indicates raised commissures in the unflattened spores. Exine 1 µ
thick or less, smooth or intra-punctate.
Dimensions: 40–50 µ (20 specimens measured).
Remarks and discussion: Spores closely resembling L. directus were encountered
by Remy and Remy (1957) in the sporangia of Oligocarpia guthieri. Backhouse
(1991) recorded and described L. directus from Collie Basin.
Genus Indospora (Bharadwaj 1962).
Diagnosis: Amb triangular. Laesurae long, extending to equator. Exine thin, verrucate or bacculate. Three ridges arising from the sub-equatorial region on the
proximal face and extending from the apices over equator to meet over the distal
polar region, either at a point, or by forming one or more circular or polygonal
loops.
Known distribution: Upper Permian of India (Bharadwaj 1962).
Remarks: Indospora is distinguished by the unique triradiated ridges on the distal
face.
Indospora clara (Bharadwaj 1962) (Fig. 2.27).
Occurrence: Rare, Upper Permian.
Description: Trilete. Amb triangular, sides straight to slightly concave. Laesurae
long, extending to equatorial margins. Exine thin, less than 1 µ thick, smooth.
Three distal ridges extend from apices, one from each apex to the distal pole area.
They meet at a triangular rounded area on the distal face (Fig. 2.25a).
Dimensions: 30–40 µ (4 specimens measured).
Remarks: I. clara was described from Collie Basin by Backhouse (1991).
Genus Granulatisporites (Potonie and Kremp 1954).
Diagnosis: Trilete. Amb triangular. Exine sculpture granulate; grana about 1 µ or
less in basal diameter.
2 Systematic Descriptions
Fig. 2.27 a Distal face with ring-like thickening. b Proximal face
Occurrence: Widespread in Upper Permian Collie–Muja Basin. Ranges from
Artinskian in the samples examined.
Description: Trilete. Amb triangular, sides often slightly convex. Laesurae clearly
outlined, extending to or almost equatorial margin, often sinuous and accompanied
by folds which indicates raised commissures in the unflattened spores. Exine 1 µ
thick or less, smooth or intra-punctate.
Dimensions: 40–50 µ (20 specimens measured).
Remarks and discussion: Spores closely resembling L. directus were encountered
by Remy and Remy (1957) in the sporangia of Oligocarpia guthieri. Backhouse
(1991) recorded and described L. directus from Collie Basin.
Genus Indospora (Bharadwaj 1962).
Diagnosis: Amb triangular. Laesurae long, extending to equator. Exine thin, verrucate or bacculate. Three ridges arising from the sub-equatorial region on the
proximal face and extending from the apices over equator to meet over the distal
polar region, either at a point, or by forming one or more circular or polygonal
loops.
Known distribution: Upper Permian of India (Bharadwaj 1962).
Remarks: Indospora is distinguished by the unique triradiated ridges on the distal
face.
Indospora clara (Bharadwaj 1962) (Fig. 2.27).
Occurrence: Rare, Upper Permian.
Description: Trilete. Amb triangular, sides straight to slightly concave. Laesurae
long, extending to equatorial margins. Exine thin, less than 1 µ thick, smooth.
Three distal ridges extend from apices, one from each apex to the distal pole area.
They meet at a triangular rounded area on the distal face (Fig. 2.25a).
Dimensions: 30–40 µ (4 specimens measured).
Remarks: I. clara was described from Collie Basin by Backhouse (1991).
Genus Granulatisporites (Potonie and Kremp 1954).
Diagnosis: Trilete. Amb triangular. Exine sculpture granulate; grana about 1 µ or
less in basal diameter.