Danilia, Brusina, 1865

Hansen, Thomas, 2019, Gastropods from the Cretaceous-Palaeogene boundary in Denmark, Zootaxa 4654 (1), pp. 1-196 : 69-70

Danilia sp.

Figs 21 J–K

Material. MGUH 33102 is an external mould.

Occurrence. Upper metre of the lower Danian ‘dead layer’ in Vokslev Quarry, Northern Jutland.

Description. Protoconch planispiral to slightly heterostrophic, submerged, nearly 0.4 mm in width, with 1 ¼ moderately convex whorls, appearing smooth. Transition to teleoconch marked by appearance of transverse ribs.

Teleoconch with strongly convex, low whorls separated by fairly deep suture located slightly below periphery of preceding whorl. Base convex. Aperture rounded with concave columella. No columellar folds or denticles present on preserved part.

Teleoconch sculpture dominated by sharp and strong prosocline and prosocyrt transverse ribs, numbering 22 to 23 per whorl on initial whorls. Transverse ribs crossed by five or six weak spiral ribs, becoming stronger on later whorls. Connecting points marked by tubercles.

Measurements. MGUH 33102 1.9 mm high and 1.3 mm wide, consisting of parts of 3 ½ teleoconch whorls in addition to protoconch.

Remarks. Danilia sp. is easily distinguished from Danilia kosslerae Kiel & Bandel, 2001b from the Campanian of Spain by the convex whorls and the nearly planispiral protoconch. It has a passing resemblance to the middle Danian Danilia quadricordata Ravn, 1933 from Denmark, but differs by the more convex whorls and finer spirals.

Figures

FIGURE 21. A–B. Leptomaria meyeri Pacaud, 2004. Silicone cast and inner mould of MGUH 33097. Width of cast 14.5. Width of inner mould 11.4 mm. C–H. Bathrotomaria jakobseni n. sp. C–F. Silicone cast and inner mould of holotype MGUH 33098. Width of exposed shell 21.3, 21.3, 15.6, 17.3 mm respectively. G. Outer mould of paratype MGUH 33099. Preserved radius 4.4 mm. H. Silicone cast of last whorl of paratype MGUH 33100. Width 16.2 mm. I. Bathybembix? sp., Silicone cast of MGUH 33101. Width 3.65 mm. J–K. Danilia sp., Silicone cast of MGUH 33102. Width 1.25 mm. L–Q. Chilodonta rudis (Binkhorst, 1861). L–M. Silicone cast of MGUH 33103. Width 6.0 mm for complete specimen, 0.25 mm for protoconch. N–O. Silicone cast of MGUH 33104. Width 7.35 mm. P. Silicone cast of aperture MGUH 33105. Height 4.8 mm. Q. Silicone cast of MGUH 33106. Width 4.65 mm. R–T. Eucycloscala gracilicostatus n. sp. R. Silicone cast of paratype MGUH 33107. Width of fragment 1.3 mm. S–T. Silicone cast of holotype MGUH 33108. Width 2.3 mm. U. Phorcus sp., Silicone cast of MGUH 33109. Height 3.2 mm, exposed width 2.2 mm.