Extinct: sister to all
other gnathostomes; Occur first in marine deposits, then freshwater; First
appear in the middle Ordovician period 470 million years ago.
Research Links
Fishes
- Class Placodermi
Unit: Fishes, 4 Class Placodermi. Class Placodermi.
The Placodermi (Placo-, scale; -dermi, skin ...
Class
Placodermi
Class Placodermi. ... non-technical. Placoderms (armored fishes) -
short non-technical intro Class Placodermi - short intro. ...
Class
Placodermi
... Placodermi. (jointed neck fish, placoderms). Species
included in the Animal Diversity Web: Bothriolepis ...
CHAP5E.HTM
Chapter 5 ARMOURED FISHES AND FISHES WITH ARMS ~Class
Placodermi The placoderms were armour-plated ...
Class: Placodermi
... Sign up for: YourName@placodermi.com. Class: Placodermi.
Start your search on Class: Placodermi. ...
Chapter
30 - Vertebrates
... [Topics] Fishes. Class Agnatha; Class Placodermi; Class Chondrichthyes;
Class Osteichthyes. [Topics] 6. Class Agnatha. ... [Topics] 7. Class Placodermi.
...
Vertebrate Evolution and
Diversity
... (a) Class Agnatha. (b) Superclass Gnathostomata. (i) Class Placodermi.
(ii) Class Chondrichthyes. ... (d). ... (14) Class Placodermi. ...
Phylum
Chordata
... Minnesota. Class Placodermi (Extinct Jawed Fish). Class
Chondrichthyes (Cartilaginous Fishes). Introduction ...
Placodermi
... Jawed fish with bony plates covering the head and anterior
trunk. 420-355 MYA (Silurian through Devonian). ...
Lecture
Outline: Early Vertebrates
... fish. The placoderms (Class Placodermi, Devonian-Mississippian) originated
from
the agnathan fish; they included both freshwater and marine forms. Placoderms
...
Primative
Fish & the Evolution of Jaws & Lungs
... are towards the end ofthe Silurian and the upper Silurian, the way the
geological
rockswould be arranged, is the guy shown here. This is a class Placodermi. ...
Chordata:
Subphylum Vertebrata
... cases a well-developed bony skeleton. Class Placodermi.
The placoderms, an entirely extinct group ...
vertebrate
- Britannica.com
... Class Placodermi (placoderms) Extinct; fishlike; jaws supported by both
cranium
and hyoid arch (amphistylic); partly ossified cranium; primitive; head and ...
Subphylum
Vertebrata
Subphylum Vertebrata, Gnathostomes, Class Placodermi:
Class Placodermi. More on fishes. Just placoderms ...
Abstracts
... Johnson, DK Elliott & JH Wittke, 1999, A new actinolepis arthrodire
(Class Placodermi)
from the Lower Devonian Sevy Dolomite, east-central Nevada: Zoological ...
Class:
Agnatha
... Agnatha Sub-unit: Ostracoderms Sub-unit: Lampreys Sub-unit: Hagfishes Class
Placodermi
Class Chondrichthyes Subclass: Elasmobranchii Subclass Holocephali Class ...
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