The strong implication was that the animal still possessed an internal gill system.
2.
They have 7 internal gills connected to a single opening on each side of the body.
3.
The internal gills are free from attachment to the stem, but are attached full-length to the inside of the cap.
4.
It even had a sheet of bone along its shoulders that supported the rear wall of an internal gill chamber.
5.
Instead of internal gills, they develop three feathery external gills that grow from the outer surface of the gill arches.
6.
Whereas damselfly nymphs have three feathery external gills, dragonfly nymphs have internal gills, located around the fourth and fifth abdominal segments.
7.
In the " Amphiumas ", metamorphosis is incomplete, and they retain one pair of gill slits as adults, with fully functioning internal gills.
8.
Some amphibians retain the external larval gills in adulthood, the complex internal gill system as seen in fish apparently being irrevocably lost very early in the evolution of tetrapods.
9.
Tadpoles lack eyelids and have cartilaginous skeletons, lateral line systems, gills for respiration ( external gills at first, internal gills later ), and vertically flattened tails they use for swimming.
10.
While the group are recognized on having feet rather than fins, most, if not all, had internal gills in adulthood and lived primarily as shallow water fish and spent minimal time on land.
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