2 Systematic Descriptions
23
Fig. 2.4 a A test split into two halves. b One half of a test
Fig. 2.5 a Test splitting into two parts, b one half of a test
Distribution: Widely distributed and reported from many parts of the world. In
Australia was described and reported from the Permian of Collie Basin (Balme
1952), from the Devonian of Carnarvon (Balme 1959), from the Triassic of Tasmania (Playford 1965), Triassic of Victoria Land, Antarctica (Norris 1965), Permian
of India (Banerjee and D’Rozario 1990), Tertiary of New South Wales (J. A.
Owen, pers. comm.).
Circulisporites parvus (de Jersey 1962; Norris 1965) (Fig. 2.6).
Occurrence: Sakmarian to Upper Permian of Collie–Muja Basins. Frequent in the
following samples: Collie Site B bore 664
-68
, 800
.
Description: Outline circular. Whole tests spheroidal, very small 23 µ in diameter.
Wall one-layered, less than 1 µ in thickness. Sculpture ribbed; ribs closely spaced,
faintly visible, of low relief, arranged in a concentric pattern.
Dimensions: 18–20 µ (20 specimens measured) (Fig. 2.6).
Sub-group Sphaeromorphitae (Downie, Evitt and Sargeant 1963)
Genus Verrucosphaera gen. nov.
23
Fig. 2.4 a A test split into two halves. b One half of a test
Fig. 2.5 a Test splitting into two parts, b one half of a test
Distribution: Widely distributed and reported from many parts of the world. In
Australia was described and reported from the Permian of Collie Basin (Balme
1952), from the Devonian of Carnarvon (Balme 1959), from the Triassic of Tasmania (Playford 1965), Triassic of Victoria Land, Antarctica (Norris 1965), Permian
of India (Banerjee and D’Rozario 1990), Tertiary of New South Wales (J. A.
Owen, pers. comm.).
Circulisporites parvus (de Jersey 1962; Norris 1965) (Fig. 2.6).
Occurrence: Sakmarian to Upper Permian of Collie–Muja Basins. Frequent in the
following samples: Collie Site B bore 664
-68
, 800
.
Description: Outline circular. Whole tests spheroidal, very small 23 µ in diameter.
Wall one-layered, less than 1 µ in thickness. Sculpture ribbed; ribs closely spaced,
faintly visible, of low relief, arranged in a concentric pattern.
Dimensions: 18–20 µ (20 specimens measured) (Fig. 2.6).
Sub-group Sphaeromorphitae (Downie, Evitt and Sargeant 1963)
Genus Verrucosphaera gen. nov.