Dalecarlioceras undetermined

Dalecarlioceras sp. Fig. 34C Material examined ESTONIA • Vohilaid Island, Vohilaid shore (E); Adila Formation, Pirgu Regional Stage; GIT 878-250. Description GIT 878-250 is a fragment of a phragmocone with part of the body chamber, in which details of the siphuncle are well-preserved. The conch increases in height from 35 mm to 49 mm over 31 mm (angle of expansion 25°). At a height of 38 mm, its width is 30 mm (CHI = 1.27), and the conch cross section is ovate with a slightly narrower margin on the prosiphuncular side. The preserved part of the body chamber is 40 mm long. In lateral view, the conch is nearly straight with a convex margin on the prosiphuncular side and a straight margin at the antisiphuncular side, which is slightly convex near the adoral end of the body chamber. The sutures are straight and directly transverse, 6 mm apart where the conch height is 49 mm (RCL = 0.12). The siphuncle is close to the conch margin, ca 3 mm in diameter where the conch height is 35 mm (RSH = 0.09). The siphuncular segments are expanded within the chambers, with their greatest width near the adoral end of the segments. Remarks The near mature size of this specimen is indicated by the convex shape of its antisiphuncular body chamber margin. The fragmentary preservation of the specimen does not permit species level determination.