24
2 Systematic Descriptions
Fig. 2.6 General view of
Circulisporites
a
b
c
d
e
Fig. 2.7 a, b Mature spores, c immature spore, d, e immature spore with beginnings of sculpture
Verrucosphaera colliensis sp. nov (Fig. 2.7).
Diagnostic features: Outline circular. Wall two-layered; inner wall up to 2 µ
thick, overlain by a sculptured outer membrane which is devoid of sculpture in
immature spores. Sculpture starts developing with spore maturation (Fig. 2.7c).
Sculpture appears as verrucate, pilate or micro-bacculate in surface view; individual elements about 1 µ long or longer in mature spores. A pylome is present
in immature, semi-mature and mature spores.
Specimen: Holotype U.W.A. 61925. Isotype U.W.A. 60941.
2 Systematic Descriptions
Fig. 2.6 General view of
Circulisporites
a
b
c
d
e
Fig. 2.7 a, b Mature spores, c immature spore, d, e immature spore with beginnings of sculpture
Verrucosphaera colliensis sp. nov (Fig. 2.7).
Diagnostic features: Outline circular. Wall two-layered; inner wall up to 2 µ
thick, overlain by a sculptured outer membrane which is devoid of sculpture in
immature spores. Sculpture starts developing with spore maturation (Fig. 2.7c).
Sculpture appears as verrucate, pilate or micro-bacculate in surface view; individual elements about 1 µ long or longer in mature spores. A pylome is present
in immature, semi-mature and mature spores.
Specimen: Holotype U.W.A. 61925. Isotype U.W.A. 60941.