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Porolepiformes is an order of prehistoric lobe-finned fish which lived during the Devonian period (about 416 to 359 million years ago). They are thought to represent the sister group to lungfish (class Dipnoi). [ 1 ]
The basal stem-lungfish Diabolepis did not possess it. Instead, it had four nostrils (two anterior and two posterior) like most fish. However, its posterior nares are very close to the lip, meaning a ventral 'displacement' of the posterior nostril can be considered a synapomorphy of the lungfish-tetrapod clade.
Lungfish are omnivorous, feeding on fish, insects, crustaceans, worms, mollusks, amphibians and plant matter. They have an intestinal spiral valve rather than a true stomach. [9] African and South American lungfish are capable of surviving seasonal drying out of their habitats by burrowing into mud and estivating throughout the
The Queensland lungfish The lungfish is a lobe-finned fish loosely described as a living fossil. Lungfish evolved the first proto-lungs and proto-limbs. They developed the ability to live outside a water environment in the Middle Devonian (397–385 Mya), and have remained virtually the same for over 100 million years. [35]
Laccognathus are classified under the family Holoptychiidae in the extinct order Porolepiformes. [5] They are not direct ancestors of tetrapods like the clade Tetrapodomorpha, but instead belong to the clade Dipnomorpha. Their closest living relatives are the members of the subclass Dipnoi (lungfish). [6] [7]
An Australian lungfish named "Granddad" at the Shedd Aquarium in Chicago was the oldest living fish in any Aquarium, and was already an adult when he was first placed on display in 1933; Granddad was estimated to be at least in his eighties, and possibly over one-hundred, at the time of his death on February 5, 2017. [33]
Glyptolepis is an extinct genus of porolepiform lobe-finned fish which lived during Devonian Period, from the early Eifelian to Frasnian Age. [ 1 ] [ 2 ] [ 3 ] Species include Glyptolepis baltica , Glyptolepis groenlandica, and Glyptolepis leptopterus .
Sarcopterygii (/ ˌ s ɑːr k ɒ p t ə ˈ r ɪ dʒ i. aɪ /; from Ancient Greek σάρξ (sárx) 'flesh' and πτέρυξ (ptérux) 'wing, fin') — sometimes considered synonymous with Crossopterygii (from Ancient Greek κροσσός (krossós) 'fringe') — is a clade (traditionally a class or subclass) of vertebrate animals which includes a group of bony fish commonly referred to as lobe ...