Pteraspis


Pteraspis

Taxobox
name = "Pteraspis"
fossil_range = Early Devonian



regnum = Animalia
phylum = Chordata
classis = Heterostraci
familia = Pteraspidae
genus = "Pteraspis"
species = "P. stensioei"
binomial = "Pteraspis stensioei"
binomial_authority =

"Pteraspis" is an extinct genus of primitive jawless fish that lived in the Devonian period.

Description

Like other heterostracan fishes, "Pteraspis" had a protective armored plating covering the front of its body. Though lacking fins beyond its lobed tail, it is thought to have been a good swimmer thanks to stiff, wing-like protrusions derived from its branchial plates (the parts of their armor that covered their gills). This, along with the horn-like "rostrum" (nose-like projection), made "Pteraspis" very streamlined in shape- a perfect quality for a good swimmer. "Pteraspis" also had some stiff spikes on its back, possibly an additional form of protection against predators. It is thought to have fed from shoals of plankton just under the ocean surface.


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Look at other dictionaries:

  • Pteraspis — Saltar a navegación, búsqueda ? Pteraspis Rango fósil: Devónico Estado de conservación …   Wikipedia Español

  • Pteraspis — ▪ paleontology       genus of extinct jawless fishlike vertebrates found as fossils in Early Devonian rocks (those 398 million to 416 million years old) in North America and Europe. Pteraspis was approximately 16 cm (6.5 inches) in length and had …   Universalium

  • pteraspis — pte·ras·pis …   English syllables

  • pteraspis — pə̇s noun Usage: capitalized Etymology: New Latin, from pter + aspis : the type genus of Pteraspidae comprising small ostracoderms in which the dorsal armor is made up of 7 large plates …   Useful english dictionary

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  • Astraspida — Pteraspidomorphi Pteraspis (Heterostraci), Zeichnung von Joseph Smit, aus Nebula to Man, 1905 England Zeitraum Unteres Ordovizium bis Oberdevon 470 bis 370 …   Deutsch Wikipedia

  • Astraspidida — Pteraspidomorphi Pteraspis (Heterostraci), Zeichnung von Joseph Smit, aus Nebula to Man, 1905 England Zeitraum Unteres Ordovizium bis Oberdevon 470 bis 370 …   Deutsch Wikipedia

  • Astraspis — Pteraspidomorphi Pteraspis (Heterostraci), Zeichnung von Joseph Smit, aus Nebula to Man, 1905 England Zeitraum Unteres Ordovizium bis Oberdevon 470 bis 370 …   Deutsch Wikipedia

  • Eriptychiida — Pteraspidomorphi Pteraspis (Heterostraci), Zeichnung von Joseph Smit, aus Nebula to Man, 1905 England Zeitraum Unteres Ordovizium bis Oberdevon 470 bis 370 …   Deutsch Wikipedia


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