undefinedB Mutvei 2013

Multiceratoidea gen. et sp. indet. B Fig. 39C Material examined ESTONIA • 1 spec.; Vormsi Island, Saxby shore; Kõrgessaare Formation, Vormsi Regional Stag; TUG 1743-37. Description The specimen is a fragment of a curved adoral part of a mature body chamber. The complete length of the fragment is 63 mm. At the aperture, the conch is 50 mm high and slightly compressed, a shallow apertural sinus (hyponomic?) occurs at the side of the conch which in lateral profile forms the convex conch margin. Otherwise, the peristome was apparently straight, transverse. At its apical end, 47 mm from the aperture, the conch has a diameter of 55 mm and is circular in cross section. In lateral view, on the convex side of the conch curvature shallow, irregularly spaced ribs occur, which are ca 15 mm apart. The conch surface is ornamented with distinct growth lines. Remarks The available information about this species, i.e., the contracted curved body chamber, compressed conch cross section, hyponomic sinus on the convex side of the conch curvature suggest that it belongs to an unknown annulated multiceratoid. More complete material is needed for a definite determination.