| This extinct order of giant scale trees includes relatives of the modern quillworts. |
| The first DNA to be extracted from an ancient specimen was from 150-year-old tissues from the quagga, an extinct relative of the zebra. |
| These turned out to be remains from the tentacles of extinct squid-like belemnites. |
| In traditional classifications, the hagfish, lampreys, and extinct armored jawless fish are grouped together in the paraphyletic Class Agnatha. |
| Dada is as extinct as the dodo, and absurdism gave Surrealism a different spin. |
| Most jawless species went extinct long ago and are known only from the fossil record. |
