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  • Pteraspis - Wikipedia
    Like other heterostracan fishes, Pteraspis had a protective armored plating covering the front of its body, and no fins other than a lobed tail Despite this, Pteraspis had two wing-like protrusions derived from the armoured plates over its gills, and a single protrusion in the center of its back
  • Pteraspis | Devonian, Placoderm, Armor | Britannica
    Pteraspis was approximately 16 cm (6 5 inches) in length and had a heavy, rounded, bony shield that covered the anterior parts of the body The remainder of the body was encased in small scales; it is probable that Pteraspis was an active, though inefficient, swimmer This article was most recently revised and updated by Richard Pallardy
  • PTERASPID Definition Meaning - Merriam-Webster
    The meaning of PTERASPID is of or relating to the Pteraspidae
  • Morphogenesis of pteraspid heterostracan oral plates and the . . .
    Here we investigate the structure and morphogenesis of pteraspid heterostracan oral plates and their associated denticles to explore their possible homology with the teeth of jawed vertebrates
  • The last pteraspids (Vertebrata, Heterostraci): new material . . . - JSTOR
    One of the main taxa, the Pteraspidiformes (Blieck, 1984), has a complex arrangement of the armor in which a number of plates grew separately and, in some taxa, fused at maturity to form larger elements
  • Pteraspis - Prehistoric Wildlife
    These adaptations all point to a fish that probably swam upwards into open water rather than cruising around the bottom ‭ ‬The chosen food source of Pteraspis is thought to have been small open water vertebrates like shrimp – On Cephalaspis and Pteraspis – Quarterly Journal of The Geological Society 01 1858; 14:267-280 – T H Huxley – 1858
  • Finite element and microstructural analyses indicate that pteraspid . . .
    Pteraspidiform heterostracans possessed an oral apparatus composed of rod-like plates that have been alternately interpreted to have been used for passive suspension feeding or mechanical food processing
  • Finite element and microstructural analyses indicate that pteraspid . . .
    Pteraspidiform heterostracans possessed an oral apparatus composed of rod-like plates that has been interpreted as being used for either passive suspension feeding or mechanical food processing
  • Pteraspididae - Wikipedia
    Pteraspididae is an extinct family of heterostracan vertebrates It is an Early Devonian-aged family that contains the stereotypical, torpedo -shaped pteraspidids, such as the type genus, Pteraspis, and its close relatives Errivaspis and Rhinopteraspis, that are popularly thought to have actively swam about in the water column
  • Pteraspid - Simple English Wikipedia, the free encyclopedia
    Pteraspids were early agnathan vertebrates They lived from later Silurian to the end of the Devonian Fossils are found in Europe and North America The whole group has the head and front of the body armoured Delicate, finger-like parts of the plates were at the edges of the mouth





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