1995 Cravenoceras gressinghamense Brandon, Riley, Wilson, & R.A. Ellison: v. 50:333-355, figs. 9-12.

Holotype. RHR 333 (Figs 10A, 12C, D), fragmentary adult exfoliated conch. Paratypes: RHR 296, 297, 298, 302308, 312, 313 (Figs., 10D, 12A, B), 317, 318, 319, 324 (Fig. 10C), 327, 330, 331, 332, 333, 334, 335, 342, 343, 345, 347, 348, 352, 353, 355 (Fig. 10B), 356, (Fig. 10E), 362 (Fig. 9A).

Type locality and horizon. North bank of Gressigham Beck [SD 5644 6996], Gressigham, Lancashire, UK. From a nodular limestone in the Cravenoceras gressighamense Marine Band (E2a-2alpha), Roeburndale Formation, Arnsbergian Stage, Namurian Series.

This species is closest to Cravenoceras subplicatum Bisat 1932, these are the only Cravenoceras species to develop umbilical plications. C. subplicatum developed umbilical plications during early adolescence rather than late adolescence, and its transverse ornament is also more feeble than that of C. gressinghamense sp. nov. The most prominent is the difference in the umbilical diameter/conch diameter ratio which is consistently lower in C. subplicatum (after D = 4 mm) than in C. gressinghamense sp. nov.