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Evolutionary Phylogenetics Lab (Ueshima Lab)
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The lab explores the evolution and phylogeny of molluscs such as snails, using both molecular and morphological approaches.
AboutAbout the lab
Exploring evolution through the diversity of snails
The Evolutionary Phylogenetics Lab studies the evolution and systematics of invertebrates, using molluscs such as snails as its main study material.
From classical comparative morphology to molecular phylogenetics and analysis of genome structure, the lab seeks to understand animal evolution from many perspectives.
Its research covers evolution at many levels, from the early stages of species divergence to the origin of animal phyla.
A model in which reversal of left-right asymmetry in snails gives rise to new species through a single gene was published in Nature.
Key terms
- Metazoa
- Animals made up of many cells that divide roles among themselves to form the body. Most animals belong to this group.
- Mitochondrial DNA
- A small, circular DNA carried by the mitochondria inside cells, separate from the DNA in the nucleus. It serves as a clue for investigating phylogeny.
- Molecular phylogenetics
- A field that compares differences in sequences such as DNA to infer the relationships among organisms and the order in which they diverged.
- Speciation
- The process by which a single species gives rise to separate species that cannot interbreed.
ResearchResearch themes
The lab studies the evolution and systematics of metazoans, centering on molluscs, using molecular biology methods such as analysis of the genome structure of mitochondrial DNA together with morphological methods. It addresses evolution at many levels, from the early stages of speciation to the origin of animal phyla.
*Illustrative imagePhylogeny Inferred from Mitochondrial DNA
The lab analyzes metazoan phylogeny using the order and orientation of genes on the mitochondrial DNA genome and changes in the genetic code as clues. It also investigates how genome structure changes in molluscs, which show diverse gene arrangements.
*Illustrative imageSpeciation in Land Molluscs
Using terrestrial molluscs, which have limited mobility and readily split into separate species when geographically isolated, the lab studies the process and mechanisms of speciation. The work centers on population genetic analyses using molecular phylogenetic methods.
*Illustrative imagePhylogeny and Systematics of Molluscs
Combining comparative morphology with molecular phylogenetic analysis, the lab re-examines the phylogenetic relationships of molluscs whose classification systems are not yet settled. For poorly studied groups, it works from describing species to building classification systems.
MembersFaculty
The members of the Ueshima Lab consist of faculty, doctoral and master's students, and technical assistants.As of 2014
- Associate ProfessorRei Ueshima
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Euhadra peliomphala” Takahashi / Public domain (cropped)
- Phylogeny Inferred from Mitochondrial DNA: “Mitochondrion 186” 作者不詳 / Public domain (cropped)
- Speciation in Land Molluscs: “Snail01” miya / CC BY-SA 3.0 (cropped)
- Phylogeny and Systematics of Molluscs: “Rapana venosa MHNT” Didier Descouens / CC BY-SA 4.0 (cropped)
- Related lab (Human Genome Diversity Lab): “Japan (MODIS )” Jeff Schmaltz, MODIS Land Rapid Response Team, NASA GSFC / Public domain (cropped)
- Related lab (Genetics Lab (Ohtani Lab)): “Arabidopsis thaliana kz07” Krzysztof Ziarnek, Kenraiz / CC BY-SA 4.0 (cropped)
- Related lab (Kawakita Lab): “Bunkyou Koishikawa Botanical Greenhouse 1” 京浜にけ / CC BY 3.0 (cropped)
- Related lab (Plant Evolutionary Ecology Lab): “P1000491 Petunia axillaris (Solanaceae) Flower” Magnus Manske / CC BY-SA 3.0 (cropped)
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