Kiaeroceras undefined-B

Kiaeroceras sp. B Fig. 35A–B Material examined ESTONIA • 1 spec.; Vormsi Island, Saxby shore; Kõrgessaare Formation, Vormsi Regional Stage; GIT 878-161. Description The specimen is an almost tubular, almost straight fragment of a mature body. The conch surface is poorly preserved but apparently smooth. The conch cross section is drop-shaped with a widely rounded antisiphuncular and a narrower prosiphuncular side. The conch height and width are 43 mm and 37 mm, respectively (CHI = 1.4). The body chamber is 63 mm long, without constriction. The remaining peristome appears to be straight and directly transverse. The base of the body chamber indicates that the sutures formed shallow lateral lobes. The siphuncle is nearly marginal, and the septal foramen has a width of 4 mm (RSH = 0.09). Remarks The fragment is relatively strongly compressed compared with other Estonian specimens of Kiaeroceras. Its adult body chamber height is smaller than in the Norwegian species.