Devonian armoured fish organ record (2022)
Long and colleagues described a 380-million-year-old Devonian armoured fish preserving internal organs, regarded as the oldest known vertebrate organs.
The find showed organ preservation can extend back hundreds of millions of years in vertebrates.
It set a benchmark for soft-tissue preservation studies and deepened understanding of ancient anatomy.
Austronaga minuta extends this type of preservation to reptiles, providing the oldest complete digestive system in the group.
