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Animal Systematics / Tsuyuki Lab (Aoi Tsuyuki)
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The lab explores the taxonomy and evolution of marine invertebrates, focusing on polyclad flatworms.

AboutAbout the lab
Studying polyclad species to explore their phylogeny and evolution
The Animal Systematics Lab (Assistant Professor Aoi Tsuyuki) studies the systematics and evolutionary biology of marine invertebrates, focusing on polyclad flatworms of the phylum Platyhelminthes.
The publications page lists papers such as records of species found in Japanese seas and descriptions of new species.
The lab also investigates the phylogenetic placement of species using both morphological and molecular evidence.
Assistant Professor Aoi Tsuyuki joined the Shimoda Marine Research Center at the University of Tsukuba in April 2026.
Key terms
- Polyclad flatworms
- Polyclad flatworms: marine animals belonging to the order Polycladida within the phylum Platyhelminthes.
- Systematics
- Systematics: the study of distinguishing, naming, and organizing species based on the evolutionary relationships (phylogeny) among organisms.
- Description of a new species
- Description of a new species: giving a scientific name to a species that has none yet, and publishing a paper that presents its characteristics, such as its form.
NewsLab news
A paper by Assistant Professor Tsuyuki and colleagues was published in Fauna Ryukyuana
A paper by Assistant Professor Tsuyuki and colleagues was published in Zoomorphology
A paper by Assistant Professor Tsuyuki and colleagues was published in Plankton and Benthos Research
A paper by Assistant Professor Tsuyuki and colleagues was published in Journal of Natural History
A paper by Assistant Professor Tsuyuki and colleagues was published in Invertebrate Systematics
ResearchResearch themes
Focusing on polyclad flatworms, the lab studies how to distinguish and name species and how to clarify the relationships among them. Its publications include papers on records of species found in Japanese seas, descriptions of new species, and phylogenetic placement based on morphology and molecular data.
View More ↗MembersFaculty
- Assistant ProfessorAoi Tsuyuki
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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: “Yellow papillae flatworm (Thysanozoon nigropapillosum)” Betty Wills / CC BY-SA 4.0 (cropped)
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(動物系統進化・ 進化発生学) ): “Invertebrate montage (2022)” File:Jelly cc11.jpg: Paroxysm~commonswiki (uploader), Original by Dan Parsons [1] File:Fromia indica HI09-0187.JPG: FredD, Original by François Michonneau File:Sepioteuthis sepioidea (Caribbean Reef Squid).jpg: Nhobgood File:Drosophila melanogaster Proboscis.jpg: Sanjay Acharya File:Aplysina lacunosa.jpg: Loopy30 (uploader), Original by jbrasher [2] File:Pseudobiceros_hancockanus.jpg: Jnpet File:Sucking leech.jpg: GlebK File:Sea Squirts (Polycarpa aurata) ( ).jpg: Josve05a (uploader), Original by Bernard DUPONT [3] File:SEM image of Milnesium tardigradum in active state - journal.pone.0045682.g001-2.png: Daniel Mietchen (uploader), Original by Schokraie E, Warnken U, Hotz-Wagenblatt A, Grohme MA, Hengherr S, et al. (2012) / CC BY-SA 4.0 (cropped) - Related lab (進
化動物学 (中野 裕昭) ): “PSM V41 D632 Private room at the marine biology laboratory” 作者不詳 / Public domain (cropped) - Related lab
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(谷研究室) ): “Crystal structure of chicken brain-type creatine kinase” Cytochrome c at English Wikipedia / CC BY-SA 3.0 (cropped)
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