ecdysozoan
Look at other dictionaries:
Arthropod — Temporal range: 540–0 Ma … Wikipedia
Ecdysis — For other uses, see Ecdysis (disambiguation). Series of pictures showing the progression of ecdysis in Callinectes sapidus, the blue crab Ecdysis (from Ancient Greek: ἐκδύω – ekduo – to take off, strip off … Wikipedia
Chaetognatha — Arrow worms Temporal range: Lower Cambrian–Recent … Wikipedia
Nematode — Not to be confused with ringworm. Nematodes Unidentified roundworm from wet soil. The mouth is at the top left corner. Scientific classification … Wikipedia
Exoskeleton — The discarded exoskeleton of a dragonfly nymph An exoskeleton is the external skeleton that supports and protects an animal s body, in contrast to the internal skeleton (endoskeleton) of, for example, a human. In popular usage, some of the larger … Wikipedia
Spriggina — Taxobox name = Spriggina color = #taxobox colour|incertae sedis fossil range = Ediacaran image width = 250px image caption = Fossil of S. floundersi . Scale in millimetres. image2 width = 120px image2 caption = Sketch reconstruction regnum =… … Wikipedia
Evolutionary history of life — Although evidence of early life is scarce and often difficult to interpret, it appears that life appeared on Earth relatively soon (on the geologic time scale) after the planet had cooled enough for liquid water to be present. The dominant theory … Wikipedia
Cambrian explosion — The Cambrian explosion or Cambrian radiation was the seemingly rapid appearance of most major groups of complex animals around Ma|530, as evidenced by the fossil record. [http://www.ucmp.berkeley.edu/cambrian/camb.html The Cambrian Period] ]… … Wikipedia
Explosion cambrienne — L’explosion cambrienne (il y a entre 542 et 530 Ma) désigne l apparition soudaine à l échelle géologique de la plupart des grands embranchements actuels de métazoaires (animaux pluricellulaires)[1] ainsi qu une grande diversification des espèces… … Wikipédia en Français
Spriggina — Spriggina Rango temporal: Cámbrico … Wikipedia Español
