Animal Evolution: Genomes, Fossils, and Trees by Maximilian J. Telford, D.T.J. Littlewood

By Maximilian J. Telford, D.T.J. Littlewood

Animal lifestyles, now and over the last part billion years, is very different. Describing and figuring out the evolution of this variety of physique plans - from vertebrates corresponding to people and fish to the varied invertebrate teams together with sponges, bugs, molluscs, and the numerous teams of worms - is an important aim of evolutionary biology. during this booklet, a gaggle of best researchers undertake a latest, built-in method of describe how present molecular genetic recommendations and disciplines as different as palaeontology, embryology, and genomics were mixed, leading to a dramatic renaissance within the learn of animal evolution.

The final decade has visible turning out to be curiosity in evolutionary biology fuelled by means of a wealth of knowledge from molecular biology. sleek phylogenies integrating proof from molecules, embryological facts, and morphology of dwelling and fossil taxa offer a large consensus of the most important branching styles of the tree of existence; in addition, the hyperlinks among phenotype and genotype are more and more good understood. This has ended in a competent tree of relationships that has been commonly accredited and has spawned a variety of new and intriguing questions that require a reassessment of the origins and radiation of animal lifestyles. the focal point of this quantity is on the point of significant animal teams, the morphological ideas that outline them, and the mechanisms of switch to their embryology that experience led to their evolution. present examine subject matters and destiny customers are highlighted together with phylogeny reconstruction, comparative developmental biology, the price of alternative assets of knowledge and the significance of fossils, homology evaluate, personality evolution, phylogeny of significant teams of animals, and genome evolution. those themes are built-in within the gentle of a 'new animal phylogeny', to supply clean insights into the styles and techniques of animal evolution.

Animal Evolution presents a well timed and entire assertion of development within the box for tutorial researchers requiring an authoritative, balanced and up to date review of the subject. it's also meant for either top point undergraduate and graduate scholars taking classes in animal evolution, molecular phylogenetics, evo-devo, comparative genomics and linked disciplines.

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Additional info for Animal Evolution: Genomes, Fossils, and Trees

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Brevicollis and the sponge A. , 2008). 3 Evolution of the Hedgehog ligand by domain shuffling. The two functional domains of the signalling protein Hedgehog, the N-terminal signal domain (black), and the C-terminal Hint domain (white), evolved on separate proteins in the ancestors of choanoflagellates and animals. One of these ancient proteins, Hedgeling (that links the N-terminal signal peptide to extracellular cadherin domains on a transmembrane protein), has homologues in sponges and cnidarians but was lost in the ancestors of bilaterians.

Adhaerens is the earliest branching metazoan. Recently, Dunn et al. (2008) published a phylogeny based upon 150 EST-derived genes that supports ctenophores as branching before two sampled sponge species. g. , 2007). The former scenario is not supported by the fossil record—sponges would have had to undergo morphological simplification before their appearance as the first recognizable metazoan fossils—and the latter explanation would require the improbable, independent evolution of nerves, muscles, and a gut in the ctenophore and cnidarian/bilaterian lineages.

2005). , 2003; Bengtson, 1994). , 2007 for discussion) sometime after the Sturtian, c. , 2006). Finally, the maximum for the origin of crown-group Eumetazoa, which was only used in the BEAST analyses, is argued to be 635 Ma based on palaeoecological observations (Peterson and Butterfield, 2005). , 2002) as a minimum for the origin of the crown-group Cnidaria, and the first appearance of vertebrates 520 Ma as the minimum for the origin of crown-group chordates (Benton and Donoghue, 2007). 2 (Drummond and Rambaut, 2006).

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