Kiaeroceras undefined-C

Kiaeroceras sp. C Fig. 35E, G Material examined ESTONIA • 1 spec.; Niibi hillock; Moe Formation, Pirgu Regional Stage; GIT 225-997. Description The specimen is a nearly complete mold of a mature body chamber with height, width, and length of 53 mm, 44 mm and 75 mm, respectively (CHI = 1.11). The conch is straight and tubular. The conch cross section is oval compressed with a relatively narrow, drop-shaped margin on the prosiphuncular side. The peristome is nearly straight and a very shallow (5 mm) hyponomic sinus occurs on the prosiphuncular side. The siphuncle is nearly marginal with a septal foramen ca 8 mm in diameter, located ca 3 mm from the conch margin (RSH = 0.15, RSP = 0.16). Comparison This specimen differs from K. ormsoense sp. nov., to which it is otherwise similar, in having a compressed conch cross section and a longer, perfectly tubular body chamber (RBL = 1.4 as compared with RBL ca 1 in K. (?) ormsoense).