BiogeographyBiogeography

Chapter 11Chapter 11History of Lineages and Biotas History of Lineages and Biotas

Figure 11.1 A hypothetical phylogeny, the only illustration Darwin included in The Origin of Species

11.2 An evolutionary classification and reconstructed phylogeny of living vertebrates

Agnatha – A class of jawless fish

Placodermi – Jawless fish with boney protective plates

Chondrichthyes – Cartilaginous fish

Osteichthyes – Boney fish

Aves - Birds

Molecular ClocksMolecular Clocks

►Molecular biologists can use an estimated Molecular biologists can use an estimated constant rate of evolution for proteins and constant rate of evolution for proteins and DNA to determine the history of lineages.DNA to determine the history of lineages.§ Still a controversial techniqueStill a controversial technique§ Calibrated from known fossil recordCalibrated from known fossil record§ Tested against other lines of evidenceTested against other lines of evidence§ Can be used as a model for when to search for Can be used as a model for when to search for

important fossils.important fossils.

11.8 Diagnostic fossils and rates of molecular divergence demonstrate that divergence from a common ancestor happened 310 million years ago

11.8 Diagnostic fossils and rates of molecular divergence. Developing a model to examine the rates of molecular divergence

11.9 Phylogeny and estimated divergence times of 12 known linyphiid spiders on the Hawaiian Islands

PhylogeographyPhylogeography► SystematicsSystematics – The study of the evolutionary relationships – The study of the evolutionary relationships

between organismsbetween organisms► MonophyleticMonophyletic – A group of organisms that include an – A group of organisms that include an

ancestral taxon and all of its descendentsancestral taxon and all of its descendents► ParaphyleticParaphyletic – A group that includes an ancestral taxon – A group that includes an ancestral taxon

and some but not all of its descendentsand some but not all of its descendents► PolyphyleticPolyphyletic – A grouping different from above that is an – A grouping different from above that is an

artificial taxonartificial taxon► CladeClade – A monophyletic evolutionary branch – A monophyletic evolutionary branch

Figure 11.10 Gene trees embedded within population trees

Figure 11.11 Phylogeography as a bridge between traditionally separate concerns of microevolution

Oldest known bat fossil (Icaronycteris index) from the Green River Shale in Wyoming at about 50 Million Years BP

11.17 Estimated area of potentially fossil-bearing sedimentary geological strata of varying ages

PaleoecologyPaleoecology

►Fossils can be used as mileposts along the Fossils can be used as mileposts along the path of evolutionpath of evolution

►Provides a temporal perspective to the Provides a temporal perspective to the changes ecological systemschanges ecological systems

►Geological provenance can tell us about Geological provenance can tell us about past environmentspast environments

11.19 Fossil localities of camels (family Camelidae) from the Pleistocene in western North America

11.20 Information from the fossil record is essential for interpreting biogeographic history with this example of lungfishes (Lepidoseriformes)

11.21 Distribution of limestone, indicating past location of shallow marine waters and coral reefs

11.22 (A) Geographic distribution, and (B) mtDNA phylogeny for a group of closely related species of leaf-eared mouse (Part 1)

11.22 (A) Geographic distribution, and (B) mtDNA phylogeny for a group of closely related species of leaf-eared mouse (Part 2)

11.17 Estimated volume of potentially fossil-bearing sedimentary geological strata of varying ages

11.3 A cladogram showing nested monophyletic groups within the Vertebrata

11.4 Cladograms illustrating monophyletic, paraphyletic, and polyphyletic groups (Part 1)

11.4 Cladograms illustrating monophyletic, paraphyletic, and polyphyletic groups (Part 2)

11.4 Cladograms illustrating monophyletic, paraphyletic, and polyphyletic groups (Part 3)

11.5 Simple phylogenetic tree illustrating the concepts of ingroup, outgroups, and sister group

11.6 Morphological phylogeny placing 66–68 million-year old fossil bird Vegavis iiai in the waterfowl

11.7 An illustration of the hierarchical nature of phylogeny

11.12 Illustration of five possible categories of phylogeographic pattern (Part 1)

11.12 Illustration of five possible categories of phylogeographic pattern (Part 2)

11.13 Mitochondrial DNA phylogenetic tree for mtDNA haplotypes of the Tailed frog (Part 1)

11.13 Mitochondrial DNA phylogenetic tree for mtDNA haplotypes of the Tailed frog (Part 2)

11.14 Unrooted haplotype networks within and among three species of elephant

11.15 A gene tree that differs from the “true” phylogenetic relationships among species

11.16 A phylogenetic hypothesis for the family-level relationships and evolutionary history of South American marsupials