A fossil analysis suggests that the yunnanozoan, a wormlike fish that flourished around 520 million years ago, sported structures that were the precursors of the head and jaws of modern vertebrates.

This oddly shaped and nearly transparent denizen of antarctic waters lacks two characteristics once thought to be present in all vertebrates: it has no red blood cells and no hemoglobin ...

While fish appear to use sound for the same purposes that other vertebrates do—typically to attract mates ... based on morphological characteristics in fish families and evolutionary relationships ...

The Marine Vertebrate Collection of Scripps Institution of Oceanography (ASIH Collection Code: SIO) maintains approximately two million alcohol-preserved specimens in over 120,000 lots, representing ...

Osaka Metropolitan University researchers review the evidence for individual face recognition in fish and speculate that face identification neural networks are both similar and widespread across ...

A fossil creature from the Devonian discovered more recently has been hailed as a vital link between fish and the first vertebrates ... land. The fish showed other characteristics of terrestrial ...

Vertebrates are animals that have a backbone inside their body. The major groups include fish, amphibians, reptiles, birds and mammals. Invertebrates don't have a backbone. They either have a soft ...

which is possibly the smallest vertebrate fossil animal known from Queensland—Palaeospondylus australis. Details about this ancient fish, found in the Georgina Basin (west of Boulia and close to ...

provide freedom of movement to all vertebrates. Scientists have known for decades that synovial joints were present in early tetrapods, and more recently also discovered them in bony fishes, but it ...

Almost all vertebrate embryos exhibit 6 aortic arches. Ancestral condition (shown in some vertebrate embryos) may have more. In gill breathing fishes, the aortic arches are retained and provide ...