Fishionary

A blog about fish words!

By Abigail Lynch

A blog about fish words!

primitive fishes

Cartilaginous

September 25, 2020 by abby

If you’ve ever eaten a fish fillet, you’ve probably had the ‘pleasure’ of picking out fish bones from your meal.  While most fish are, indeed, bony (superclass: Osteichthyes), certain lineages of fish have cartilaginous skeletons, meaning that their skeletal structure is composed of cartilage, like a human ear or nose, rather than bone.  Elasmobranchs (sharks, skates, … [Read more…]

Posted in: C Tagged: chimaera, chondrichthyes, elasmobranchs, genetics, osteichthyes, placoid denticles, placoid scale, primitive fishes, rays, scute, sharks

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

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