MOULTING VARIABILITY IN THE MIDDLE DEVONIAN TRILOBITE DUCTINA FROM NANDAN,GUANGXI, CHINA
MOULTING VARIABILITY IN THE MIDDLE DEVONIAN TRILOBITE DUCTINA FROM NANDAN,GUANGXI, CHINA
广西南丹中泥盆世三叶虫Ductina的蜕壳
MOULTING VARIABILITY IN THE MIDDLE DEVONIAN TRILOBITE DUCTINA FROM NANDAN,GUANGXI, CHINA
广西南丹中泥盆世三叶虫Ductina的蜕壳