Key;
Laboratory;
of;
Palaeobiology;
and;
Stratigraphy,;
Nanjing;
Institute;
of;
Geology;
and;
Palaeontology,;
Chinese;
Academy;
of;
Sciences,;
Nanjing;
210008,;
China;
of;
Earth;
and;
Space;
Sciences,;
Peking;
University,;
Beijing;
100871,;
China;