- γνάθος (gnathos) 'jaw' + στόμα (stoma) 'mouth') are
jawed vertebrates.
Gnathostome diversity comprises roughly 60,000 species,
which accounts for 99% of...
-
Acanthodii or
acanthodians is an
extinct class of
gnathostomes (jawed fishes). They are
currently considered to
represent a
paraphyletic grade of various...
- Wang, Jianhua; Wang, Chun-Chieh; et al. (September 2022). "The
oldest gnathostome teeth". Nature. 609 (7929): 964–968. Bibcode:2022Natur.609..964A. doi:10...
- †"Placodermi" (Paleozoic
armoured forms;
paraphyletic in
relation to all
other gnathostomes)
class Chondrichthyes (cartilaginous fish; 900+ species)
class †"Acanthodii"...
- the
squamosal (a
small cranial bone) meet to form the joint. In most
gnathostomes,
including early therapsids, the
joint consists of the
articular (a small...
-
closely integrated as in
modern gnathostomes.
These teeth were
likely homologous to the
teeth of
other gnathostomes. One of the
largest known arthrodires...
- is one of the two
essential processes during fetal development of the
gnathostome (excluding
chondrichthyans such as sharks)
skeletal system by
which rudimentary...
-
Vertebrata └─Infraphylum
Gnathostomata ├─Placodermi —
extinct (armored
gnathostomes) └Eugnathostomata (true
jawed vertebrates) ├─Acanthodii (stem cartilaginous...
- cephalaspidomorphs,
among others). They are
sister to
vertebrates with jaws
known as
gnathostomes, who
evolved from
jawless ancestors during the
early Silurian by developing...
-
cyclostomes (jawless
lamprey and hagfish) to
gnathostomes (jawed fish). In
terrestrial chordates,
which are
gnathostomes themselves, the
myomeres become fused...
