MolluscaBase name details
original description
Cowper Reed, F. R. (1920). A Monograph of the British Ordovician and Silurian Bellerophontacea. Part I. Pages 1–48; Plates I–VIII. <em>Monographs of the Palaeontographical Society.</em> 72(345): 1-48., available online at https://doi.org/10.1080/02693445.1920.12035580 page(s): 34, pl. VI, fig. 12-14 [details] 
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