-
Acanthostega (meaning "spiny roof") is an
extinct genus of stem-tetrapod,
among the
first vertebrate animals to have
recognizable limbs. It
appeared in...
-
evolved in the Devonian,
including the Late Devonian-age
Ichthyostega and
Acanthostega, as well as the
trackmakers of the
Middle Devonian-age
Zachelmie trackways...
-
defining changes on the
basis of
anatomy of Ichthyostega, Tulerpeton, and
Acanthostega. In the cranium,
there is a
stapes derived from the
hyomandibular of...
- fin was not as deep as in
Acanthostega, and
would have been less
useful for swimming.
Ichthyostega is
related to
Acanthostega gunnari,
which is also from...
- group, the
earliest limbed tetrapodomorphs such as
Ichthyostega and
Acanthostega,
which evolved in the
Devonian period long
before the
origin of the crown...
-
Russia at a site
named Andreyevka. This
genus and the
closely related Acanthostega and
Ichthyostega represent the
earliest tetrapods.
Tulerpeton is considered...
- (7472): 546–549. doi:10.1038/nature12645. Benton,
Michael J. (2019). "
Acanthostega".
Vertebrate Palaeontology (Kindle ed.). Wiley. p. 90. Encyclopædia Britannica...
- the
transition to the Carboniferous.
Ichthyostegalia Acanthostegidae Acanthostega Cr****igyrinidae Cr****igyrinus
Densignathidae Densignathus Elginerpetontidae...
-
Ventastega is more
primitive than
other Devonian tetrapodomorphs including Acanthostega and Ichthyostega, and
helps further understanding of the fish-tetrapod...
- the
species that
existed during this transition, such as
Tiktaalik and
Acanthostega. Many of
these species were also the
first to
develop adaptations suited...
