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Mar 6, 2024 · Chordata is a diverse phylum within the animal kingdom, encompassing a wide array of organisms, from fish and birds to humans. This phylum is characterized by the presence of a notochord, a hollow nerve cord, pharyngeal slits, and a muscular post-anal tail at some stage of their development.
- Chordate Superhero League. Holy notochords, Batman! Chordates are the vertebrate superhero league of the animal kingdom - but they also have a few sidekicks: lancelets and tunicates: All members of team Chordata, whether swimmiest of fish or stealthiest of mammals, share a common origin story that includes a notochord during their embryonic stage, pharyngeal slits for water-based superpowers, a dorsal nerve cord for crime-fighting reflexes, and a post-anal tail for mighty locomotion.
- Cathaymyrus Pickup Line. Once upon a prehistoric ocean, in a world of underwater speed dating, the Cathaymyrus had its very own unique pickup line: "Hey, are you a vertebrate?
- Sea Squirts' Childhood Dreams. Did you know sea squirts have an odd way of throwing in the towel on their childhood dreams? They start with ambitions of being spinal cord superstars, but eventually, they settle for a more humble existence: Tunicates, also known as sea squirts, are invertebrate chordates that have a notochord only during their larval stage, but as they mature, they lose it, squeezing out a life as filter feeders with characteristics like a dorsal nerve cord.
- Lancelets: Smart Invertebrates. Whoever said "get your head in the game" must have had lancelets in mind: These quirky invertebrates are the only living spineless creatures with an actual head, complete with sensory organs and a brain-like structure called the cerebral vesicle, giving them a clear edge over their invertebrate chordate pals!
Apr 22, 2015 · Most of these fossils have been referred to as chordates because they show at least some indication of either a notochord (the axial support of chordates, and precursor of the vertebral...
- Philippe Janvier
- janvier@mnhn.fr
- 2015
Characteristics of Chordata. Animals in the phylum Chordata share four key features that appear at some stage during their development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail ( [link] ). In some groups, some of these are present only during embryonic development.
Phyla. Chordates. Associated Shape of Life Content. I Am the Walrus. Seabirds are Sentinels of Ocean Health. The Marvelous Mobula Rays. Our Chordate Family Tree. Man, are those Mantas Brainy! Chordates: The Voyage to Us Bones, Brawn, and Brains. Read more.
Evolution and paleontology. Many scientists maintain that chordates originated sometime earlier than 590 million years ago; that is, they predate the fossil record. Such early representatives were soft-bodied and therefore left a poor fossil record. The oldest known fossil chordate is Pikaia gracilens, a primitive cephalochordate dated to ...
Chordates. Animal behavior. The nervous system. Circulatory & respiratory systems. The digestive system. The excretory system: From your heart to the toilet. The skeletal system: It's ALIVE! Big Guns: The Muscular System. Your immune system: Natural born killer. Great glands - Your endocrine system. The reproductive system: How gonads go.
- 12 min
- EcoGeek