MolluscaBase taxon 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): 24, pl. IV, fig. 15 [details]