WESTERN AUSTRALIAN PERMIAN BRACHIOPODS 
5 
Superfamily Aulostegacea Muir-Wood & 
Cooper, 1960 
Family Aulostegidae Muir-Wood & Cooper, 
1960 
Subfamily Aulosteginae Muir-Wood & 
Cooper, 1960 
Genus Aulosteges von Helmersen, 1847 
Type species. Orthis wangenheimi de Verneuil, 1845 
(= Aulosteges variabilis von Helmersen, 1847). 
Aulosteges cf. baracoodensis Etheridge, 1903 
Fig. 3A-C 
cf. Aulosteges baracoodensis Etheridge 1903: 22, pi. 
2, figs 1—2a.—Hosking 1933: 32, pi. 1, figs la-c, pi. 2, 
figs a, b.—Coleman 1957: 36, pi. 1, figs 1, 3, 4, 6. 
cf. Aulosteges lyndonensis Coleman 1957 (partim.), 
pi. 4, figs 9, 10 (non cet.). 
Aulosteges. —Dickins 1976: 100. 
Material. One natural cast of a ventral valve with 
attached ear of dorsal valve and one external mould of 
the anterior of a dorsal valve (CPC 28036-28037) 
from BMR locality T127, Scott Bluff, Lake Blanche 
(22°3r06"S, 123°14'06"E), collected by BMR field 
parties in 1975. 
Comments. The Aulosteginae is represented in 
the Scott Bluff collections by some nine speci¬ 
mens, two of them belonging to Aulosteges itself. 
On the basis of shell shape, the low convexity of 
the ventral valve, the apparently relatively low 
ventral interarea and the fine to medium sized, 
relatively closely spaced spine bases on the ven¬ 
tral valve, comparison with A. baracoodensis is 
indicated. A natural cast of a ventral valve (CPC 
28036) possesses a clearly demarcated small ear 
and recalls a specimen from the Callytharra For¬ 
mation assigned to A. lyndonensis by Coleman 
(1957, pi. 4, figs 9, 10). Coleman’s specimen is 
herein assigned to A. baracoodensis on the basis 
of its relatively closely spaced ventral spine 
bases. An incomplete external mould of a dorsal 
valve is also compared with A. baracoodensis on 
the basis of a low dorsal median fold. Other in¬ 
complete external moulds of dorsal valves from 
Scott Bluff show very minor development of a 
similar feature and are discussed under Taenio- 
thaerus cf. invinensis.A. baracoodensis is known 
from the Sterlitamakian Callytharra Formation 
(Carnarvon Basin) and the Fossil Cliff Member 
of the Holmwood Shale (Perth Basin). 
Genus Taeniothaerus Whitehouse, 1928 
Type species. Productus subquadratus Morris, 1845. 
Comments. The type species has been rede¬ 
scribed by Parfrey (1983). Reports of the species 
Fig. 2. A-E, Strophalosia irwinensis Coleman. A, CPC 28035, internal mould of ventral valve, x 2. B, C, CPC 
24430, internal mould of ventral valve and latex cast of mould, x 2.3 and x 2.6. D, E, CPC 24429, internal mould 
of ventral valve in ventral and anterior views, x 2.5. 
