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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 ...
Some of these photoreceptors can reach 20–24 μm in diameter, possibly the largest in the animal kingdom. [ 19 ] [ 20 ] The mouth is small and in a subterminal position. [ 15 ] The lungfish can grow to a length of about 150 cm (4.9 ft), and a weight of 43 kg (95 lb). [ 12 ]
Lungfish are freshwater vertebrates belonging to the class Dipnoi. [1] Lungfish are best known for retaining ancestral characteristics within the Osteichthyes, including the ability to breathe air, and ancestral structures within Sarcopterygii, including the presence of lobed fins with a well-developed internal skeleton.
Coelacanths (/ ˈ s iː l ə k æ n θ / ⓘ SEE-lə-kanth) (order Coelacanthiformes) are an ancient group of lobe-finned fish (Sarcopterygii) in the class Actinistia. [2] [3] As sarcopterygians, they are more closely related to lungfish and tetrapods (which includes amphibians, reptiles, birds and mammals) than to ray-finned fish.
Eusthenopteron (from Greek: εὖ eû, 'good', Greek: σθένος sthénos, 'strength', and Greek: πτερόν pteron 'wing' or 'fin') [2] is a genus of prehistoric sarcopterygian (often called "lobe-finned") fish known from several species that lived during the Late Devonian period, about 385 million years ago.
Sarcopterygii Euteleostomi ( Eu- teleostomi [ a ] , where Eu- comes from Greek εὖ 'well, good' [ b ] or Euteleostomes , also known as "bony vertebrates " [ c ] ) is a successful clade that includes more than 90% of the living species of vertebrates.
2. 5:2 diet: Eat normally for 5 days a week and restrict calories to 500–600 on 2 non-consecutive days. 3. Alternate-day fasting: Fast every other day, often allowing only about 500 calories on ...
The West African lungfish is historically known as a unique species and an early precursor of fish to tetrapods. Due to its monophyletic clade, Dipnoi, it is the sister group to the tetrapods; this is attributed to its distinctive physiology and inferred data from fossil and taxa records.