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Evolution of fish. The evolution of fish began about 530 million years ago during the Cambrian explosion. It was during this time that the early chordates developed the skull and the vertebral column, leading to the first craniates and vertebrates. The first fish lineages belong to the Agnatha, or jawless fish.
The evolution of fishes took place over a timeline which spans the Cambrian to the Cenozoic, including during that time in particular the Devonian, which has been dubbed the "age of fishes" for the many changes during that period. The Late Devonian extinctions played a crucial role in shaping the evolution of fish, or vertebrates in general. [1]
Synonyms. Placodermata. Placoderms (from Greek πλάξ ( plax, plakos) ' plate ' and δέρμα ( derma) 'skin') [1] are vertebrate animals of the class Placodermi, an extinct group of prehistoric fish known from Paleozoic fossils during the Silurian and the Devonian periods. While their endoskeletons are mainly cartilaginous, their head and ...
Sarcopterygii (/ ˌ s ɑːr k ɒ p t ə ˈ r ɪ dʒ i. aɪ /; from Ancient Greek σάρξ (sárx) 'flesh', and πτέρυξ (ptérux) 'wing, fin') — sometimes considered synonymous with Crossopterygii (from Ancient Greek κροσσός (krossós) 'fringe') — is a clade (traditionally a class or subclass) including both a group of bony fish commonly referred to as lobe-finned fish, and ...
Morton was a crucial innovator in the evolution from the early jazz form known as ragtime to jazz piano, and could perform pieces in either style; in 1938, Morton made a series of recordings for the Library of Congress in which he demonstrated the difference between the two styles. Morton's solos, however, were still close to ragtime, and were ...
Eel life history. Eels are any of several long, thin, bony fishes of the order Anguilliformes. They have a catadromous life cycle, that is: at different stages of development migrating between inland waterways and the deep ocean. Because fishermen never caught anything they recognized as young eels, the life cycle of the eel was long a mystery.
Tales of the Jazz Age (1922) is a collection of eleven short stories by F. Scott Fitzgerald. Divided into three separate parts, according to subject matter, it includes one of his better-known short stories, "The Curious Case of Benjamin Button". All of the stories had first appeared, independently, in either Metropolitan Magazine, The Saturday ...
Jazz is a 1992 historical novel by Pulitzer and Nobel Prize -winning American author Toni Morrison. The majority of the narrative takes place in Harlem during the 1920s; however, as the pasts of the various characters are explored, the narrative extends back to the mid-19th-century American South . The novel forms the second part of Morrison's ...