Definition

A type of bony fish that has paired fins resembling limbs and is believed to be related to the ancestors of land vertebrates, many of which are now extinct.

Example

The crossopterygian fish, like the coelacanth, are fascinating because they show features that link them to the evolution of land animals.

Conversation

Have you ever heard of a crossopterygian?

No, I haven't! What is it?

It's a type of ancient fish that some say might be related to the first land animals.

That's really interesting! I love learning about prehistoric creatures.

Synonyms & Antonyms

Root Explanation

Crossopterygian → It is formed from "crosso-" (from Greek "krossos", meaning cross) and "pterygion" (from Greek "pterux", meaning fin). The term refers to a group of fish characterized by their cross-shaped fins.

Memory Tip

Think of the 'cross' shape of the fins ('crosso-') and 'pterygion' meaning fins, which helps you remember that crossopterygian refers to fish with cross-shaped fins.

Visually Confused Words