phylogeny: Quick Facts

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A diagram showing the tentative evolutionary relationships among hominid species over the past four million years, with skull images and labeled species names connected by solid and dotted lines to indicate proposed evolutionary pathways.

Diagram comparing the forelimb bone structures of a human, horse, dolphin, box turtle, fruit bat, and chicken, with color-coded bones showing homologous parts to illustrate evolutionary relationships.

A branching phylogenetic tree diagram shows evolutionary relationships among various organisms, from Neurospora mold to humans, based on differences in cytochrome c gene sequences. Each branch is labeled with nucleotide substitution values and illustrated with animal or organism icons along the tree.

A summary of probable lines of plant evolution.

Hypothetical relationships in the animal kingdom.

Diagram comparing two phylogenetic trees based on molecular changes: one tree shows evolutionary relationships among four species using myoglobin changes, and the other compares humans, rhesus monkeys, and horses using cytochrome c changes, with arrows and numbers indicating the amount of molecular change between branches.

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Topics

diphyletic theory monophyletic theory phylogenetic tree How Do You Read Phylogenetic Trees?phylogenetics

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Key People

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Willi Hennig

German zoologist

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Edward Charles Jeffrey

American botanist

greylag. Flock of Greylag geese during their winter migration at Bosque del Apache National Refugee, New Mexico. greylag goose (Anser anser)

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greylag. Flock of Greylag geese during their winter migration at Bosque del Apache National Refugee, New Mexico. greylag goose (Anser anser)

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Diversity among heteropterans. lace bug, termite bug, coreid bug, bat bug, toad bug, water strider, backswimmer, bedbug, stinkbug, water scorpion, plant bug, insects

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