- can be
distinguished by
their well-developed head capsule,
amphineustic spiracular arrangement, and are oblique/vertical. The
oldest fossil of the group...
- Berquist,
Rachel M.; Frank,
Lawrence R.; Long, John A. (January 2014). "
Spiracular air
breathing in
polypterid fishes and its
implications for
aerial respiration...
-
immediately above the
spiracular line
being larger and more
distinct giving the
effect of a
black line over the
white spiracular line. The
paired lines...
- scales". www.geology.cz.
Retrieved 2024-02-28. Graham,
Jeffrey (2014). "
Spiracular air
breathing in
polypterid fishes and its
implications for
aerial respiration...
-
capitulum (dorsal view); b,
capitulum (ventral view); c, scutum; d,
spiracular plate; e,
sternal plate; f, hypostome; g, coxae; h,
tarsus I; i, tarsus...
- N.; Berquist,
Rachel M.; Frank,
Lawrence R.; Long, John A. (2014). "
Spiracular air
breathing in
polypterid fishes and its
implications for
aerial respiration...
-
opercular bone is very
small and
holds a
large soft-tissue
opercular flap. A
spiracular chamber is present, but the
spiracle is
closed and
never opens during...
- to Gaiasia. On the edge of the braincase, a spur of bone
divides the
spiracular cleft (a hole
which hosted the
spiracle or ear canal) from the depressor...
- glabrous,
often partially sclerotized and
bearing posterior spiracles. The
spiracular disc is
usually surrounded by lobe-like
projections and anal papillae...
-
increase in the size of the
spiracular chamber and its
opening to the outside.
Compared to Eusthenopteron, the
spiracular chamber of
Panderichthys is...
