Traits taxon details
original description
Walcott, C. D. (1902). Cambrian Brachiopoda: Acrotreta; Linnarssonella; Obolus; with descriptions of new species. <em>United States National Museum, Proceedings.</em> 25: 577-612. [details]
basis of record
Hansen, J.; Holmer, L. E. (2011). Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen. <em>Zootaxa.</em> 3076(1): 1-122., available online at https://doi.org/10.11646/zootaxa.3076.1.1 [details] Available for editors 
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