44
2 Systematic Descriptions
Fig. 2.24 a Partly split spore, showing fine, hyaline ektexine. b Proximal view, simple laesurae.
c Microtome section showing the extremely thin gossamer-like structured ektexine breaking up and
separating from thick and solid endexine
Fig. 2.25 a Proximal face, thickenings of exine between laesurae. b Slight thickening and folding
of exine between proximal mark, c thickening around equatorial area, d folds in exine
Discussion: Retusotriletes was emended by Richardson to include smooth exine
forms only.
Retusotriletes diversiformis (Balme and Hennelly 1956; Balme and Playford
1967) (Fig. 2.25).
Occurrence: Sakmarian to Upper Permian of Collie–Muja Basin, Sue No.1 Bore.
More common in Upper Permian. Rare in Lower Permian.
2 Systematic Descriptions
Fig. 2.24 a Partly split spore, showing fine, hyaline ektexine. b Proximal view, simple laesurae.
c Microtome section showing the extremely thin gossamer-like structured ektexine breaking up and
separating from thick and solid endexine
Fig. 2.25 a Proximal face, thickenings of exine between laesurae. b Slight thickening and folding
of exine between proximal mark, c thickening around equatorial area, d folds in exine
Discussion: Retusotriletes was emended by Richardson to include smooth exine
forms only.
Retusotriletes diversiformis (Balme and Hennelly 1956; Balme and Playford
1967) (Fig. 2.25).
Occurrence: Sakmarian to Upper Permian of Collie–Muja Basin, Sue No.1 Bore.
More common in Upper Permian. Rare in Lower Permian.