Brunton, C.H.C.; Curry, G.B. (1979). British brachiopods. Keys and notes for the identification of the species. <em>Synopses of the British fauna (New Series), N.S. 17. Academic Press: London. ISBN 0-12-137960-4.</em> 64 pp.[details]
reach a max. length of ca. 25 mm and a max. width of ca. 20 mm