Table 2 The standard of taphonomic grades.
From: A new method for examining the co-occurrence network of fossil assemblages
Taphonomic grades | Preservation | ||
|---|---|---|---|
Clam shrimps and bivalves | Other arthropods | Vertebrates | |
A | Shell edge >90% preserved. growth bands are fully clear. | >90% preserved. Body articulated, wing veins visible and almost complete. | Body and limbs are complete and articulated. |
B | Shell edge >70% preserved. growth bands are almost clear. | 80–90% preserved. Body almost complete, including head, thorax, abdomen and thoracic appendages, details such as antennae or cerci lost. | 70–80% torso and limbs are complete. Partial joint displacement. |
C | Shell edge >60% preserved. growth bands are partially clear. | 60–80% preserved. Body deformed, at least one of six legs lost. | 60–70% torso preserved. |
D | Shell edge >50% preserved. | 30–60% preserved. Wings disarticulated, remains of head, thorax and abdomen preserved. | Torso with missing tail or head. |
E | Shell fragments. | <30% preserved. High disarticulated body, isolated structures such as single legs, abdomen and/or wings preserved. | Scattered bones. |
