Extinct
group of small, fishlike Paleozoic vertebrates, species of which belonged to
several orders particularly copious in Late Silurian and Early Devonian periods
(387 to 421 million years old) of North America, Europe and Eurasia.
Research Links
Ostracoderms
- under construction
Ostracoderms. early armoured morphotypes. ... Paleozoic Agnaths (Ostracoderms)
- Evolutionary diagram. Ostracoderm Environments. ...
Vertebrata
... and the majority of the vertebrate species were jawless fishes (the "ostracoderms",
presumably more closely related to the gnathostomes than to lampreys). The ...
Nearctica -
Paleontology -
... OSTRACODERMS (jawless fish). Vertebrates. Tree of Life. Philippe Janvier.
This portion
of the Tree of Life is an excellent introduction to the "ostracoderms"
of ...
Untitled
Sub-Unit: Ostracoderms. Ostracoderms. The extinct Agnatha
were all small fish, being only a few inches ...
Fossil
Agnathan Fishes
... they may have been important in maneuvering. In early thinking about the
ostracoderms,
only the orders Heterostraci and Osteostraci were well known. The paired ...
ostracoderm
- Britannica.com
... appendages were often absent. These primitive characteristics show that the
ostracoderms
were allied to the living Cyclostomata--hagfishes and lampreys--an ...
Systematics
of the Vertebrates
Vertebrates: Systematics. Early Vertebrate Groups. Move deeper into the
systematics
of vertebrate groups by selecting one of the boxes containing a picture! ...
Evolution
of the Vertebrates
... Ostracoderms - Class Agnatha. Ostracoderms. The earliest fish fossils
are found in marine rocks, suggesting that fishes evolved in the sea. ...
Fossil Groups -
Vertebrates
... Early vertebrates (called Ostracoderms) were quite different from any living
today
because they lacked fins, a lower jaw, and they were heavily armored for ...
OSSM Vertebrate Zoology
... Jawless Ostracoderms (shell, skin). ... The fossils represented organisms
that were
small, jawless forms collectively called ostracoderms (shell, skin). ...
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