Cephalaspis (from Greek: κεφαλή kephalḗ, 'head' and Greek: ἀσπίς aspís, 'shield') is a possibly monotypic genus of extinct osteostracan agnathan vertebrate. It was a trout-sized detritivorous fish that lived in the early Devonian.

Cephalaspis, extinct genus of very primitive, jawless, fishlike vertebrates found in Lower Devonian rocks (the Devonian Period lasted from 416 to 359.2 million years ago) in Europe and North America.

2024年5月27日 · The cephalaspis (meaning “head shield”) is a fossilized genus of fish that lived during the early Devonian Period roughly 416-359.2 million years ago. These were heavily armored fish that defended themselves against predators such as the placoderms and eurypterids. The cephalaspis lived in a calcium-poor freshwater habitat.

Cephalaspis (meaning 'head shield') is a genus of armoured fish in the early Devonian about 400 million years ago (mya). It was one of the jawless fishes, or ostracoderms, which were common at the time. They were discovered in the first half of the 19th century in the Old Red Sandstone of Britain. Louis Agassiz named it in 1835. [2] .

Osteostraci (osteostracans) is a group of extinct bony-armored jawless fish that lived in what are now North America, Europe and Asia from the Middle Silurian to Late Devonian period. These bottom-dwelling creatures were probably relatively good swimmers, possessing dorsal fins, paired pectoral fins, and a strong tail.

Cephalaspis is a good example of the jawless fish that swam through the waters of the Devonian.‭ ‬Although jawless,‭ ‬it still had a mouth that was situated to the underside of the head,‭ ‬suggesting that it was a bottom feeder.‭ ‬Also there seems to be sensory organs on the underside of the head suggesting that it searched for ...

2022年6月6日 · Cephalaspis is the jawless fish of the Paleozoic era. Their mouths are located under their head, like a shark. Due to its mouth position, it is suggested that it often feeds off the ocean floor. Their biological evolution also suggests …