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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]
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.
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.
MEGA provides a graphical interface for displaying a phylogenetic tree based on a variety of options. In the view menu, the tree can be displayed in three different styles: traditional, radiation, or circle. Traditional trees have three different branch styles: rectangular, straight, or curved.
A phylogenetic tree, phylogeny or evolutionary tree is a graphical representation which shows the evolutionary history between a set of species or taxa during a specific time. [ 1 ] [ 2 ] In other words, it is a branching diagram or a tree showing the evolutionary relationships among various biological species or other entities based upon ...
Cetacean species articles can contain: a short introduction on the species, such as whether it is baleen or toothed physical characteristics such as their birth and adult sizes and weights for both sexes, colour, callosities, fin placement, size and shape, and how one may distinguish between that and other species
Cetacea (/ s ɪ ˈ t eɪ ʃ ə /; from Latin cetus 'whale', from Ancient Greek κῆτος 'huge fish, sea monster') is an infraorder of aquatic mammals belonging to the order Artiodactyla that includes whales, dolphins and porpoises.
Basilosauridae is a family of extinct cetaceans that lived during the middle to late Eocene.Basilosaurids are known from all continents including Antarctica, [2] and are probably the first fully aquatic cetaceans.