nautiloid fossils鹦鹉螺化石
nautiloid new genus鹦鹉螺类
N（名词） any mollusc of the Nautiloidea, a group of cephalopods that includes the pearly nautilus and many extinct forms 鹦鹉螺目的软体动物
ADJ（形容词） of, relating to, or belonging to the Nautiloidea 鹦鹉螺目的