40
2 Systematic Descriptions
Fig. 2.22 a Corrosion of endexine in P. gretensis. b Thinner and less rigid endexine in immature
spore does not lend itself to corrosion. c Semi-distal and proximal views. d Proximal view showing
simple laesurae and very thick exine. e Microtome sections of P. gretensis showing thick smooth
exine. f, g Tetrads of immature Punctatisporites gretensis pollen
Diagnosis: Amb circular to sub-circular. Laesurae complex. Tetrad rays followed
by distinct margo from flattened thickened exine. Sculpture consists of low-relief,
wide-based verrucae confined to contact area.
Occurrence: Upper Permian, common in Collie–Muja Basin; Bore B/224
-227
,
D/201
-212
and 1/50
.
2 Systematic Descriptions
Fig. 2.22 a Corrosion of endexine in P. gretensis. b Thinner and less rigid endexine in immature
spore does not lend itself to corrosion. c Semi-distal and proximal views. d Proximal view showing
simple laesurae and very thick exine. e Microtome sections of P. gretensis showing thick smooth
exine. f, g Tetrads of immature Punctatisporites gretensis pollen
Diagnosis: Amb circular to sub-circular. Laesurae complex. Tetrad rays followed
by distinct margo from flattened thickened exine. Sculpture consists of low-relief,
wide-based verrucae confined to contact area.
Occurrence: Upper Permian, common in Collie–Muja Basin; Bore B/224
-227
,
D/201
-212
and 1/50
.