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Species of the infraorder Cetacea A phylogenetic tree showing the relationships among cetacean families. [1]The evolution of cetaceans is thought to have begun in the Indian subcontinent from even-toed ungulates (Artiodactyla) 50 million years ago (mya) and to have proceeded over a period of at least 15 million years. [2]
BayesPhylogenies [8] Bayesian inference of trees using Markov chain Monte Carlo methods: Bayesian inference, multiple models, mixture model (auto-partitioning) M. Pagel, A. Meade BayesTraits [9] Analyses trait evolution among groups of species for which a phylogeny or sample of phylogenies is available: Trait analysis: M. Pagel, A. Meade BEAST [10]
The branch lengths are multiplied by 1+ax, where the variable x is obtained from an exponential distribution (P(x>k) = exp(-k)), and the constant a is a tuning factor accounting for the deviation intensity (as described in Guindon and Gascuel (2002), [9] the value of a was set to 0.8). The random trees generated by this procedure have depth of ...
The following is a list of currently existing (or, in the jargon of taxonomy) 'extant' species of the infraorder cetacea (for extinct cetacean species, see the list of extinct cetaceans). The list is organized taxonomically into parvorders, superfamilies when applicable, families, subfamilies when applicable, genus, and then species.
A viewer capable of viewing multiple overlaid trees. All [23] FigTree: Simple Java tree viewer able to read newick and nexus tree files. Can be used to color branches and produce vector artwork. All [24] JEvTrace A multivalent browser for sequence alignment, phylogeny, and structure.
Representing the earliest cetacean radiation, they include the initial amphibious stages in cetacean evolution, thus are the ancestors of both modern cetacean suborders, Mysticeti and Odontoceti. [2] This initial diversification occurred in the shallow waters that separated India and Asia 53 to 45 mya , resulting in some 30 species adapted to a ...
Cetacea.org homepage; Walker's Mammals of the World Online - Cetaceans Archived 2004-10-11 at the Wayback Machine (Unfortunately, the online edition of Walker's Mammals of the World is no longer available. The print edition may still be purchased through the Johns Hopkins University Press.) Cetacean Society International
Phylogenetic trees generated by computational phylogenetics can be either rooted or unrooted depending on the input data and the algorithm used. A rooted tree is a directed graph that explicitly identifies a most recent common ancestor (MRCA), [citation needed] usually an inputed sequence that is not represented in the input.