Fishionary

A blog about fish words!

By Abigail Lynch

A blog about fish words!

teleost

phylogeny

June 28, 2019 by abby

Phylogeny is the representation of evolutionary relationships, often displayed as a “tree” (i.e., branching diagram) where the most closely related organisms are connected by a node and more distantly related organisms have multiple steps back in the tree before they are connected.  Nodes are often characterized by biogeographic events and evolutionary innovations. In fishes, jawless … [Read more…]

Posted in: P Tagged: biogeography, chondrichthyes, ctenoid, cycloid, derived fishes, ganoid, genetics, osteichthyes, primitive fishes, rays, scales, sharks, swim bladder, teleost

Osteichthyes

November 6, 2015 by abby

Osteichthyes are a taxonomic grouping of bony fishes.  This group includes ray-finned fishes (class: Actinopterygii) and lobe-finned fishes (class: Sarcopterygii).  This highly diverse group of fishes, which contains almost all fish species, is the most diverse group of vertebrates today.  Osteichthyes differ from chondrichthyes by (in most cases) possessing a bony skeleton, a swim bladder, … [Read more…]

Posted in: O Tagged: chondrichthyes, ctenoid, cycloid, ganoid, osteichthyes, scales, swim bladder, teleost

Teleost

September 12, 2014 by abby Leave a Comment

Teleosts are the most diverse group of fishes (over 26,500 extant species).  Over half of all living vertebrate species are teleosts.  Teleosts are characterized by a protrusible jaw (musculature gives them the ability to move their maxilla and premaxilla) and a symmetrical tail (their spine that ends at the caudal peduncle unlike, for example, sharks).  Teleosts … [Read more…]

Posted in: T Tagged: caudal peduncle, protrusible jaw, teleost

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