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 Babylonella sp. Figs 33 M–N Material. MGUH 33293, MGUH 33294 and possibly an incomplete external mould with the informal sample number SS.213.A–C. Occurrence. The Cerithium Limestone Member at Højerup and perhaps Flagbanken, Stevns Klint. Description. Protoconch conical with nearly planispiral apex. It consists of just over three convex and smooth whorls, with a sharp transition to teleoconch marked by the appearance of transverse ribs. Width 0.95 mm ; height slightly lower. Teleoconch fairly slender with highly convex whorls and a marked shoulder and adapical ramp; whorls twice as wide as high. Last whorl taking up approximately 70 % of the shell height, abapically forming short canal. Columella with two moderately weak folds. Teleoconch sculpture dominated by 10 to 11 sharp, prosocline transverse ribs, fading out adapically and abapically on ramp and base; ribs highest at shoulder. Ribs crossed by four or five fine spiral threads from shoulder and down on spire whorl, and two additional but weaker spiral threads on ramp. Last whorl covered by 12 more or less evenly distributed primary spiral threads and two weaker ones alternating with the original two spiral threads on ramp. Measurements. MGUH 33293 is 2.6 mm high and 1.6 mm wide, consisting of protoconch and two teleoconch whorls. Remarks. This taxon has a strong morphological resemblance to the Selandian Babylonella ravni ( Glibert, 1960 ) from Denmark , but the protoconch has more whorls and may be slightly more conical in outline, while the number of transverse teleoconch ribs per whorl is in the low end.