Traits taxon details
original description
Brown, I. A. (1953). Permian spirifers from Tasmania. <em>Journal Proceedings of the Royal Society N. S. W.</em> 86: 55-63. [details]
taxonomy source
Waterhouse, J. B. (2016). On the evolution and classification of Spiriferida (Brachiopoda). <em>Earthwise.</em> 14: 1-434. note: Recognizes genus as valid and allocates it to Subfamily Grantoniinae. [details] Available for editors 
additional source
Armstrong, J. D. (1968). Synonymy of the Australian Permian spiriferid genera <i>Trigonotreta</i> Koenig, 1825 and <i>Grantonia</i> Brown, 1953. <em>Journal of the Geological Society of Australia.</em> 15(1): 79-86, pl. 6. [details]
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