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A notable characteristic that make a tetrapod's skull different from a fish's are the relative frontal and rear portion lengths. The fish had a long rear portion while the front was short; the orbital vacuities were thus located towards the anterior end. In the tetrapod, the front of the skull lengthened, positioning the orbits farther back on ...
Tetrapodomorpha (also known as Choanata [3]) is a clade of vertebrates consisting of tetrapods (four-limbed vertebrates) and their closest sarcopterygian relatives that are more closely related to living tetrapods than to living lungfish.
Stegocephali was re-established to replace the broad definition of Tetrapoda, resolving the usage of two conflicting definitions in discussions of tetrapod evolution. Stegocephali was coined in 1868 by the American paleontologist Edward Drinker Cope , who used it as a general category of prehistoric amphibians.
Tiktaalik, a tetrapodomorph with wrists, straddles the fish-tetrapod divide. The Stem Tetrapoda are a cladistically defined group, consisting of all animals more closely related to extant four-legged vertebrates than to their closest extant relatives (the lungfish), but excluding the crown group Tetrapoda.
Family Felidae (domestic cats, leopards, lynxes, tigers, lions, cougars, and cat relatives) Family Viverridae (civets, African linsangs, and genets) Family Hyaenidae (hyenas and aardwolf) Family Eupleridae (Malagasy carnivorans) Family Herpestidae (mongooses) Suborder Caniformia (dog-like carnivorans and relatives)
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Cats can learn words faster than human babies, a new study has found. The felines have been living alongside humans for around 12,000 years, and during this time, they seem to have closely ...