Examples of tetrapod

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The detailed descriptions and illustrations provide an anatomical atlas that will be of great help to those working on tetrapod evolution and interrelationships.
Stratigraphic ranges of the principal tetrapod taxa are indicated.
Firstly, the high density of the lepidosaur populations results from a low species diversity and the island tetrapods therefore expand their niche space.
In short this is an excellent and comprehensive account of the state of our knowledge of this important, and often neglected, group of tetrapods.
What can explain the death of great numbers of lepidosaurs and other small tetrapods that are transported as articulated skeletons and/or numerous individual bones?
In fact, the scope of the volume reaches even wider, as it closes with a section on stem tetrapods and fossil amphibians.
Most of the individual chapters fall into the second category: all of the major tetrapod groups are considered, ranging from temnospondyls to marsupials.
Perhaps there were a number of factors both biotic and abiotic involved in the death of the tetrapods.
However, even nearby islands are unlikely to have the same tetrapod components living contemporaneously, and some species may never reach some localities.
There are previous reports where site-specificity has been correlated with monogenean development, but these relate mostly to polystomatids from tetrapod hosts.
Nonetheless, all reptiles and birds are classified as diapsids just as, for example, legless lizards and snakes are classified as tetrapods.
The two cetacean suborders have evolved for 50 million years from a common tetrapod ancestor.
More recent work on amphibians presents something of a puzzle and a surprise, however, concerning thalamic evolution within this clade and within tetrapods.
Therefore, there is clear evidence for forest fires in both sauropsid and mammal-bearing fissures that provides a plausible explanation for the death of the tetrapods.
Twenty-three chapters are presented sequentially from basal chordates and vertebrate origins through to tetrapods.
The chapters dealing with the evolution of the tetrapod limb were particularly well written, expressing the complexities of limb-bud formation and differentiation with clear, jargon-free prose.
He interprets the hindlimb as pentadactyl with extra 'interdigital' structures and does not accept the suggestion that polydactyly, and not pentadactyly, is primitive for tetrapods.
Zimmer chooses to concentrate on two macroevolutionary events that have long puzzled zoologists and palaeontologists: the origin of tetrapods and the origin of whales.
The absence of abundant insect remains does not seem to us a significant impediment to the forest fire theory which otherwise explains the origination of the tetrapod fossils so well.

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