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Research Group

Biodiversity I: Animal Systematics

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BidoversityI: Animal Syatematics

Numerous species of organisms live on our planet. Ordinarily-familiar members include vascular plants, insects, fish, beasts, and birds. The number of known organismal species is said to be about 1.5 million; the actual number is estimated to be ten to hundredfold. Animals comprise the most diverse group among them. Then,

・Where and how are they originated from?

・How many species of animals do exist on the Earth?

・What kind of relationships do they have between other organisms?

We are interested in the above issues, and tackling to solve these promlems in our lab.

See Biodiversity I Website

Faculties

柁原 宏 / Hiroshi Kajihara
Associate Professor

Hiroshi Kajihara / 柁原 宏

Fields of Specialty
Marine invertebrate morphology, taxonomy, phylogeny, biogeography
Research Contents
My main interest is the systematics of phylum Nemertea (ribbon worms), which comprises about 1200 species distributed worldwide. Ongoing projects in my laboratory include descriptive taxonomy of representatives of Gastrotricha, Polychaeta, Platyhelminthes (Kalyptorhynchia), and the enigmatic interstitial archiannelid Diurodrilus, whose relationship to existing phyla is unclear.
エレーナ・フォルトゥナート / Helena  Fortunato
Associate Professor

Helena Fortunato / エレーナ・フォルトゥナート

Fields of Specialty
Evolution and ecology of marine invertebrates
Website
/~kazi/shinka1/index_e.htm
Research Contents
My research focuses on the evolution, biogeography, and adaptation of coastal invertebrates, and the ecology of coastal invertebrate communities, using both Recent and paleontological data. An important theme is the impact of ocean acidification on carbonate-building organisms, and the consequences of acidification for coastal biodiversity. The organisms I study include mollusks, bryozoans, and coralline algae.
加藤 徹 / Toru Katoh
Associate Professor

Toru Katoh / 加藤 徹

Fields of Specialty
Molecular phylogeny, Population genetics
Website
/~tkatoh/
Research Contents
My research uses DNA sequence data to elucidate the phylogeny, phylogeography, and population diversity of insects. Projects currently underway include 1) the molecular phylogeny of fruit flies (family Drosophilidae); 2) the molecular phylogeography of ladybird beetles (subfamily Epilachninae); and 3) the population genetics of East Asian eplachnine beetles.
角井 敬知 / Keiichi Kakui
Lecturer

Keiichi Kakui / 角井 敬知

Fields of Specialty
Invertebrate systematics; tanaidacean biology
Website
http://sites.google.com/site/tnidjpn/me
Research Contents
I am interested in the taxonomy, phylogeny, reproductive biology, morphology, and evolution of invertebrate animals. The main focus of my research is the order Tanaidacea, a group of tiny aquatic crustaceans, with around 1200 species. However, past or ongoing collaborative projects in taxonomy and phylogeny have dealt with animal groups other than tanaidaceans, including isopods, amphipods, copepods, mites, nematodes, octocorals, entoprocts, nemerteans, and echinoderms.
西田 千鶴子 / Chizuko Nishida
Research Associate

Chizuko Nishida / 西田 千鶴子

Fields of Specialty
Cytogenetics
Website
/~kazi/shinka1/index_e.htm
Research Contents
Karyotypes, which are species-specific descriptions of the number and morphology of chromosomes, are more conservative in birds than in mammals and are quite similar even in phylogenetically distant orders. On the other hand, karyotypic changes due to chromosome rearrangements occur in many avian lineages, especially in Accipitridae (Accipitriformes). I study the evolution of avian karyotypes through comparative analyses of basic and modified karyotypes.

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