n.鹦鹉螺类动物
"These surprising results made us wonder if nautiloid fossilsmight also have some secrets to reveal. 他们有明显的头部，眼睛很大，视力很好。
From 2003 to 2004, we collected a large amount of Nautiloid and Graptolite fossils in upper metamorphic formations of Mayigangri area and determined the age to be middle and Late Ordovician-Silurian. 2004年我们在玛依岗日一带变质岩系上部采获大量鹦鹉螺类和笔石类化石
Nautiloid（new genus）； 鹦鹉螺类（新属）；
nautiloid fossils 鹦鹉螺化石
