Gastropods from the Cretaceous-Palaeogene boundary in Denmark Author Hansen, Thomas text Zootaxa 2019 2019-08-12 4654 1 1 196 journal article 26049 10.11646/zootaxa.4654.1.1 9ce1d103-9234-4fbe-9544-f1c294bb8783 1175-5326 3365803 CFD82CC0-3110-472E-972B-7ADC0C523A04 Trochocerithium sp. Fig. 24R Material. Specimen MGUH 33151 is an external mould of the spire. Occurrence. Lower Danian Cerithium Limestone Member just south of Højerup Church, Stevns. Description. Protoconch unknown. Teleoconch broad-spired, conical, with flat sides; whorls low, height corresponding to just over 35% of width. Whorl sculpture dominated by up to around ten weak, beaded spiral ribs and a slightly more pronounced abapical beaded spiral rib located just adjacent to abapical suture. Nearly effaced prosocline and slightly opisthocyrt striae cross the spiral ribs, resulting in a dense beading of spiral ribs. Abapical spiral rib carrying nearly 90 tubercles on sixth preserved whorl. Measurements. Specimen MGUH 33151 measures 13.3 mm in height and 9.0 mm in width and has 8 whorls. Remarks. The Danish specimen is easily distinguished from the Danian Trochocerithium chapuisi ( Briart & Cornet, 1873 ) from Belgium in the extensive spiral and transverse ribbing of the whorls and the distinct tuberculation of the primary abapical spiral rib. It may be conspecific with the Cretaceous Cerithium heberti Geinitz, 1875 from Germany