Facts about Placoderms, an extinct prehistoric animal

Dinosaur Jungle



Dinosaur Books



Dinosaur Clothing



Dinosaur Crosswords



Dinosaur Facts
   Amazing Dinosaurs
   Classification
      Ornithischia
         Ankylosaurs
         Ceratopsians
         Marginocephalia
         Ornithopods
         Pachycephalosaurs
         Stegosaurs
      Saurischia
         Prosauropods
         Sauropods
         Theropods
   Definition
   Diet
   Eggs
   Extinction
   Family Tree
   Fossils
         Footprints
   Life Span
   Living Dinosaurs?
   Myths
   Timeline
      Triassic Period
      Jurassic Period
      Cretaceous Period
   World
      African Dinosaurs
      Antarctic Dinosaurs
      Asian Dinosaurs
      Australian Dinosaurs
      European Dinosaurs
      Indian Dinosaurs
      N. American Dinosaurs
      S. American Dinosaurs



Dinosaur Fun



Dinosaur Games



Dinosaur Jokes



Dinosaur Museums
   Australia Dinosaur Museums
   Canada Dinosaur Museums
   UK Dinosaur Museums
   USA Dinosaur Museums



Dinosaur Names



Dinosaur Pictures



Dinosaur Scientists
   Charles Darwin
   Mary Anning
   Sir Richard Owen
   More Dinosaur Scientists



Dinosaur Software



Dinosaur Types
   Allosaurus
   Ankylosaurus
   Apatosaurus
   Baryonyx
   Brachiosaurus
   Centrosaurus
   Ceratosaurus
   Coelophysis
   Deinonychus
   Dilophosaurus
   Diplodocus
   Euoplocephalus
   Iguanodon
   Kentrosaurus
   Lambeosaurus
   Maiasaura
   Megalosaurus
   Microraptor
   Monoclonius
   Pachycephalosaurus
   Parasaurolophus
   Pentaceratops
   Protoceratops
   Saltopus
   Saurolophus
   Seismosaurus
   Spinosaurus
   Stegosaurus
   Styracosaurus
   Supersaurus
   Triceratops
   Tyrannosaurus Rex
   Velociraptor
   More Dinosaur Types



Dinosaur Toys



Dinosaur Video Games



Dinosaur Videos



Dinosaur Word Search



Other Prehistoric Animals
   Aetosaurs
   Ambulocetus
   Ammonites
   Andrewsarchus
   Archaeopteryx
   Basilosaurus
   Belemnites
   Brontotheres
   Chalicotheres
   Champsosaurs
   Coelacanth
   Cynodonts
   Dicynodonts
   Dimetrodon
   Gastornis
   Glyptodonts
   Gorgonopsians
   Hesperornis
   Hyracotherium
   Ichthyosaurs
   Mammal-like Reptiles
   Mammoths
   Mastodons
   Megaloceros
   Megalodon
   Meganeura Monyi
   Megatherium
   Mosasaurs
   Moschops
   Pakicetus
   Paraceratherium
   Phorusrhacids
   Placoderms
   Plesiosaurs
   Pliosaurs
   Pterosaurs
   Sea Scorpions
   Smilodon
   Spiny Sharks
   Tiktaalik
   Titanoboa
   Trilobites
   More Prehistoric Animals





Dinosaur Links
   Dinosaur Coloring
   Dinosaur Hangman
   Dinosaurs News
   Dinosaurs Parks

Education - Math Downloads
   Fun With Figures
   Making Math More Fun
   Math Bingo
   Math Riddle Book
   Download Math eBooks

Education - Reading Downloads
   Child Learning Reading
   Dolch Sight Words
   Phonics Bingo
   Robot Reading Games
   Sight Word Bingo

Education - Science Downloads
   24 Hour Science Projects
   Super Science Fair Projects
   Download Science eBooks


 
   
Dinosaur Jungle   >   Other Prehistoric Animals   >   Placoderms

Placoderms



Placoderm

Scientific Classification
  Kingdom Animalia
  Phylum Chordata
  Infraphylum Gnathostomata
  Class Placodermi
Placoderms are a group of extinct armored fish. They are noted for their heavily armored head and thorax, which are covered with armor plates (whereas the rest of the body either has scales or is unarmored depending on the particular species). Additionally, Placoderms are noteworthy for using sharp bony plates as teeth (recent research suggests that Placoderms may have evolved their jaws independently from other jawed vertebrates).

The earliest known fossils date from the mid-Silurian period of the Paleozoic Era (about 430 million years ago) and are found in China. During this time, Placoderms are not believed to have been uncommon, although fossils from rocks of this age seem to be relatively rare - paleontologists attribute this to Placoderms living in environments where fossilization was unlikely.

During the following Devonian period (beginning about 408 million years ago), a diverse array of Placoderms are known to have lived, in both freshwater and saltwater environments. Placoderms however under went a rapid decline during and after the late Devonian mass extinction (about 364 million years ago), and were completely extinct by the end of the Devonian period (about 360 million years ago).

The first scientific descriptions and studies of Placoderms were published by Louis Agassiz in the first half of the 19th century. Since that time, a variety of theories about Placoderms classification have been proposed (in the past, they have been at times described as related to jawless fish, related to cartilaginous fish such as sharks, and even as shelled invertebrates), however today, they are usually classified to fall within the Gnathostomata (the group of animals that includes all jawed fish and other vertebrates), but to be a sister group of all other known Gnathostomata.

Placoderms Timeline:



Placoderms were armored fish that lived between 430 and 360 million years ago

Placoderms were armored fish that lived between 430 and 360 million years ago


Related Information & Resources


See Also

Placoderm Books


Here are some books from Amazon.com:

Disclosure: Products details and descriptions provided by Amazon.com. Our company may receive a payment if you purchase products from them after following a link from this website.

17 Placoderms: Everyone Should Know About (Prehistoric Beasts Everyone Should Know About) (Volume 9)
By Mr Stanton Fordice Fink V

CreateSpace Independent Publishing Platform
Paperback (46 pages)

17 Placoderms: Everyone Should Know About (Prehistoric Beasts Everyone Should Know About) (Volume 9)
List Price: $8.00*
Lowest New Price: $8.00*
Lowest Used Price: $8.28*
Usually ships in 24 hours*
*(As of 04:35 Pacific 22 May 2019 More Info)


Click Here
Product Description:
If you love prehistoric fishes, this is the coloring book series for you! Wikipedia Illustrator Stanton F. Fink presents his reconstructions of extinct species of placoderm fishes, both famous and obscure, for the coloring pleasure of everyone, their inner child and their outer child, as well as information about each bygone creature.
THE PLACODERM FISH RHACHIOSTEUS PTERYGIATUS GROSS AND ITS RELATIONSHIPS.
By Roger S. Miles

Royal Society of Edinburgh
Paperback

THE PLACODERM FISH RHACHIOSTEUS PTERYGIATUS GROSS AND ITS RELATIONSHIPS.
Lowest Used Price: $26.93*
*(As of 04:35 Pacific 22 May 2019 More Info)


Click Here
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON B BIOLOGICAL SCIENCES VOL 263 PP 101-234 NUMBER 849: THE HOLONEMATIDAE (PLACODERM FISHES), A REVIEW BASED ON NEW SPECIMENS OF HOLONEMA FROM THE UPPER DEVONIAN OF WESTERN AUSTRALIA
By R S. Miles

Royal Soc
Paperback

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON B BIOLOGICAL SCIENCES VOL 263 PP 101-234 NUMBER 849: THE HOLONEMATIDAE (PLACODERM FISHES), A REVIEW BASED ON NEW SPECIMENS OF HOLONEMA FROM THE UPPER DEVONIAN OF WESTERN AUSTRALIA
Lowest Used Price: $24.95*
*(As of 04:35 Pacific 22 May 2019 More Info)


Click Here
Product Description:
Association copy: The prior owner, Craig Black (1932-1998), was a respected vertebrate paleontologist and professor who served as Curator and later Director of Carnegie Museum of National History, and from 1982 until his retirement in 1994, Director of the Natural History Museum of Los Angeles County.
Evolution and Classification of Placoderm Fishes
Cambridge Museum of Comparative Zoology
Paperback
Lowest Used Price: $35.00*
*(As of 04:35 Pacific 22 May 2019 More Info)


Click Here
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON B: BIOLOGICAL SCIENCES, VOLUME 282, NUMBER 986: ON SOME VARIATIONS IN THE LATERO-SENSORY LINES OF THE PLACODERM FISH 'BOTHRIOLEPSIS'; ON THE LATERAL LINES AND DERMAL BONES IN THE PARIETAL REGION OF
By W. Graham-Smith

Royal Society
Paperback
Lowest Used Price: $31.54*
*(As of 04:35 Pacific 22 May 2019 More Info)


Click Here
Isolation of Sexual Strains of Placoderm Desmids [extracted from the Bulletin of the Torrey Botanical Club]
By Richard C Starr

Torrey Botanical Club
Paperback
Lowest Used Price: $8.84*
*(As of 04:35 Pacific 22 May 2019 More Info)


Click Here
FEATURES OF PLACODERM DIVERSIFICATION AND THE EVOLUTION OF THE ARTHRODIRE FEEDING MECHANISM.
By Roger S. Miles

Royal Society of Edinburgh
Paperback
Lowest Used Price: $26.93*
*(As of 04:35 Pacific 22 May 2019 More Info)


Click Here
TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH VOL. LXVI-NO. 15: THE PLACODERM FISH RHACHIOSTEUS PTERYGIATUS GROSS AND ITS RELATIONSHIPS.
By Roger S. Miles

Oliver & Boyd
Paperback
Lowest Used Price: $34.30*
*(As of 04:35 Pacific 22 May 2019 More Info)


Click Here
Evolutionary and Classification of Placoderm Fishes, 1975, Breviora, Number 432 : 24 pages with illustrations.
By R. H. Denison

Harvard Museum of Comparative Zoology
Paperback
 
Antiarchs (placoderm fishes) from the Devonian Aztec siltstone, southern Victoria Land, Antarctica (Palaeontographica)
By Gavin C Young

E. Schweizerbart
Unknown Binding (125 pages)
 


Discuss This Page


Please feel free to post your comments:



Linking to This Page


We do hope that you find this site useful. We welcome people linking to this website or citing us.

The URL of this web page, is:


If you want to link to this web page from your own web site, you can use the following HTML code:


You are also very welcome to tell your friends about us on Facebook:
24 Hour Science Projects


 
 










































     
 
DinosaurJungle.com is
Copyright © 2006-2019, Answers 2000 Limited

CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED 'AS IS' AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.
CERTAIN CONTENT THAT APPEARS ON THIS SITE,COMES FROM AMAZON EU S. r.l. THIS CONTENT IS PROVIDED 'AS IS' AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.


In Association With Amazon.com
Answers 2000 Limited is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
In Association With Amazon.co.uk
Answers 2000 Limited is a participant in the Amazon EU Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.co.uk.
As an Amazon Associate, our company earns from qualifying purchases. Amazon, the Amazon logo, Endless, and the Endless logo are trademarks of Amazon.com, Inc. or its affiliates.

Disclosure: Our company's websites' content (including this website's content) includes advertisements for our own company's websites, products, and services, and for other organization's websites, products, and services. In the case of links to other organization's websites, our company may receive a payment, (1) if you purchase products or services, or (2) if you sign-up for third party offers, after following links from this website. Unless specifically otherwise stated, information about other organization's products and services, is based on information provided by that organization, the product/service vendor, and/or publicly available information - and should not be taken to mean that we have used the product/service in question. Additionally, our company's websites contain some adverts which we are paid to display, but whose content is not selected by us, such as Google AdSense ads. For more detailed information, please see Advertising/Endorsements Disclosures

Our sites use cookies, some of which may already be set on your computer. Use of our site constitutes consent for this. For details, please see Privacy.

Click privacy for information about our company's privacy, data collection and data retention policies, and your rights.

Contact Us   Privacy   Terms Of Use   Advertising/Endorsements Disclosures