Meanings of diabolical ironclad in English

Now researchers have revealed the secrets behind the near-indestructibility of the diabolical ironclad beetle.

While other beetles have interlocking elytra, the diabolical ironclad had a greater number of interlocking sections, resembling connected jigsaw-puzzle pieces.

Barclay added that while most beetles lived for only a matter of weeks, the diabolical ironclad could live for about seven or eight years.