-
Agnatha (/ˈæɡnəθə, æɡˈneɪθə/; from
Ancient Gr**** ἀ- (a-) 'without' and γνάθος (gnáthos) 'jaws') or
jawless fish is a
paraphyletic infraphylum of animals...
- and
various classes of fish and reptiles. The fish
include the
jawless Agnatha, and the
jawed Gnathostomata. The
jawed fish
include both the cartilaginous...
- (Osteichthyes),
cartilaginous fish (Chondrichthyes), and
jawless fish (
Agnatha).
According to FishBase, 35,800
species of fish had been
described as of...
- taxonomy.
Traditional classification divides fish into
three extant classes (
Agnatha, Chondrichthyes, and Osteichthyes), and with
extinct forms sometimes classified...
- with
Metaspriggina and the
other craniates (both
gnathostomatans and
Agnatha)
grouped with
Branchiostoma and the cephalochordates, and
Pikaia out on...
- Fish vary
greatly in size. The
extant whale shark and
basking shark exceed all
other fish by a
considerable margin in
weight and length. With the extinct...
-
first craniates and vertebrates. The
first fish
lineages belong to the
Agnatha, or
jawless fish.
Early examples include Haikouichthys.
During the late...
-
cartilaginous fishes or
primitive vertebrates. Cope (1889)
coined the name
Agnatha ("jawless") for a
group that
included the
cyclostomes and a
number of fossil...
- The
following is a list of the
classes in each
phylum of the
kingdom Animalia.
There are 107
classes of
animals in 33
phyla in this list. However, different...
- This
article contains a list of all of the
classes and
orders that are
located in the
Phylum Chordata. The
subphyla Tunicata and
Vertebrata are in the...
