2 Systematic Descriptions
81
Fig. 2.57 a Taeniae of
corpus. b Thick nexine of
corpus. Distal view: ‘sulcus’,
sacci roots
a
b
Genus Protohaploxypinus (Samoilovich 1953; Hart 1964).
Diagnosis: Disaccate striatiti. Haploxylonoid to slightly diploxylonoid. Corpus
outline circular. Cappa striated; divided into four or more taeniae. Sacci of same
size as corpus or slightly smaller.
Known distribution: Lower Permian to Triassic of Northern and Southern hemispheres. Reported from Permian coal of Brazil (Cazzulo-Klepzig et al.2009), from
Permian of Antarctica (Farabee et al. 1990), Permian of Collie Basin (Backhouse
1991).