tailshield
Etymology
From tail + shield.
tailshield means the pygidium. Lexicurio rates it Sui generis — a strength score of 85 out of 100.
noun
- The pygidium.“Trilobites have a distinct headshield or cephalon and a distinct tailshield or pygidium, and in both these regions the original segmentation has been suppressed — more completely in the cephalon than in the pygidium — and [...]”