Our Team
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Evan Economo
Principal Investigator
I am a biologist with broad interests in the ecology and evolution of biodiversity, and how biodiversity intersects with technology and sustainability. See my page for more.
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Chisa Oshiro
Research Unit Administrator (OIST)
I was born in Okinawa but went to the United States to study American Literature with a focus on environmental literature. I wrote about the relationship between humans and nature by comparing the thoughts of great authors, artists, and architects. I also wrote about culture, language, and identity. The mixture of these ideas gave me the desire to return to Okinawa with the goals of spreading public education, preserving nature, and improving self-reliant economic development in Okinawa. I am overjoyed to have the opportunity to pursue these goals at OIST by using my past administrative experience to help the everyday operations of Arilab’s research.
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Yichen He
Postdoctoral Fellow (OIST)
I am a researcher working at the interface between computer science and biology. I completed my PhD at the University of Sheffield, where I developed AI and computer vision methods to study biodiversity and evolution, focusing on understanding global variation in plumage colour and ultraviolet reflectance in birds.
After my PhD, I worked as a postdoctoral researcher at the Natural History Museum in London and the University of Sheffield, focusing on segmentation, phenotyping, and developing open-source tools that make deep learning methods more accessible for biologists. I have experience working with diverse data types, including 2D specimen images, cross-sectional images (e.g. micro-CT), and 3D meshes.At OIST, I am working in the Arilab to generate fine-grained datasets from ant scans, such as part-level segmentations, and to explore new morphometric approaches for analysing phenotypic diversity.
I am passionate about learning new computational models and exploring how they can be applied across different types of biological data.For more information, please visit my GitHub: https://github.com/EchanHe
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Karen Kohama
Research Technician (OIST)
I am an entomologist and evolutionary biologist interested in patterns of extinction and diversification in insects in deep time. The research areas I am most interested in include patterns and mechanisms of extinction in the fossil record, new methods for paleoecological reconstruction of extinct communities, and mechanisms and drivers of morphological stasis in deep time. The main goals of my research center on understanding extrinsic and intrinsic factors linked to large-scale dynamics of extinction and persistence.
My previous research focused on understanding extinction dynamics in ants during the Cretaceous as a function of their estimated ecologies, through the synthesis of fossil, phylogenetic, and morphological data. At OIST, I plan to continue synthesizing such lines of evidence and expand my research to assess a variety of drivers of extinction and diversification in the ant fossil record, including interspecific competition, environmental change, and assessing lineage responses to such pressures, to ultimately understand what factors underlie selective extinction patterns in insects.
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Yaal Dryer
PhD Student (UMD)
I'm Yaal (pronounced Yale), and I'm generally interested in how morphological and molecular evolution are impacted by habitat preferences and biogeography, especially among aquatic beetles. I hope to contribute to a modern systematic revision of the family Elmidae as a means to explore these broad questions, particularly as it relates to both the diversification and convergence of their plastron morphology. After receiving my B.A in Biology from the University of Rochester, I worked in the Brelidze lab at Georgetown University conducting cancer and epilepsy research from 2021-2023, then worked as a biologist at the Illinois EPA in the Surface Water Section from 2023-2025.
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Pablo Stillwell
PhD Student (UMD)
I did my undergrad at the University of Minnesota. There, I undertook several research projects and acquired various skills and techniques. I started by investigating the ecology of ant-caterpillar symbioses as well as the dynamics of wolbachia co-infections in drosophila. I later went on to curate a library of calliphoridae COI sequences as a tool for species delimitation, and lead the de novo assembly of the Winsome Fly genome. For my PhD, I want to focus on resolving the systematics of overlooked ant taxa by integrating phylogenetics, phenomics, and biogeography to uncover their evolutionary histories.
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Maël Doré
JSPS Fellow (OIST)
I am an evolutionary biologist and biogeographer interested in mapping the evolution of biodiversity at large taxonomic, spatial, and time scales, with a particular focus on insects.
I completed my PhD at Museum National d’Histoire Naturelle (Paris, France) on the evolution and biodiversity of Neotropical mimetic butterflies, focusing on quantifying and mapping the distribution of colour pattern diversity both in time and space.
After my PhD, I join the Ants of the World project at the Museum für Naturkunde (Berlin, Germany), where I investigated the biogeographic history and diversification patterns of ponerine ants worldwide. My current project in the ARI Lab is the direct continuation of this research. In PONEROMICS, I aim to combine phylogenomics and 3D phenomics approaches to study the adaptive evolution of mandibles in ponerine ants, linking 3D shape to ecological function across continents.
Lab Alumni
Postdocs | Staff Scientists
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Riou Mizuno
Postdoc (2023-2025)
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Christine Sosiak
JSPS Fellow (2023-2025)
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Adrian Richter
JSPS Postdoc (2023-2024)
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Larisa Kiselva
Staff Scientist (2021-2025)
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Nurit Eliash
Postdoc (2021-2022)
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Dan Warren
Staff Scientist (2021-2022)
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Alexandre Casadei Ferreira
Postdoc (2020-2024)
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Jamie Kass
JSPS Postdoc (2019-2023)
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Susan Kennedy
Postdoc (2018-2021)
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Nao Takashina
JSPS Postdoc (2017-2020)
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Francisco Hita Garcia
Staff Scientist (2016-2022)
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Nick Friedman
Postdoc (2015-2020)
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Clive Darwell
Postdoc (2015-2018)
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Georg Fischer
Postdoc (2014-2020)
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Béatrice Lecroq
Postdoc (2012-2014)
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Masashi Yoshimura
Staff Scientist (2012-2018)
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Benoit Guénard
Postdoc (2012-2014)
Lab Alumni
Graduate Students
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Lazzat Aibekova
PhD 2025
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Shubham Gautam
PhD 2025
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Julian Katzke
PhD 2025
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Yazmín Zurápiti
PhD 2025
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Gaurav Agavekar
PhD 2025
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Evropi Toulkeridou
PhD 2021
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Yuka Suzuki
PhD 2021
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Cong Liu
PhD 2019
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Yafei Mao
PhD 2019
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Patricia Wepfer
PhD 2019
Lab Alumni
Technical Staff
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Kenneth Dudley
Research Computing Technician (2014-2020)
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John Deyrup
Research Technician (2013-2014)
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Julia Janicki
Research Computing Technician (2015-2017)
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Fumika Azuma
Research Technician (2018-2023)
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Kosmas Deligkaris
Research Computing Technician (2019-2023)
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Dimitris Petsopoulos
Research Computing Technician (2024-2025)
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Miyuki Suenaga
Research Technician (2021-2025)
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Azumi Kudaka
Research Assistant (2023-2025)
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Mayuko Suwabe (2016-2019)
Research Technician
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Takuma Yoshida
Research Technician (2015-2019)
Lab Alumni
Interns and Visiting Students
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Jocelyn Wang
Research Intern (2024-2025)
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Hlib Burtsev
Research Intern (2024)
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Arthur Matte
Research Intern (2023)
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Henry Cerbone
Research Intern (2023)
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Jordan Drapin
Visiting Grad Student (2023)
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Leo Tozetto
Research Intern (2023)
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Minsoo Dong
Research Intern (2023)
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Kaylin Chong
Visiting Grad Student (2023)
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Sam Ross
Visiting Grad Student (2020)
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April Lamb
Research Intern (2019)
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Kelvin Chen
Research Intern (2019)
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Zachary Lieberman
Research Intern (2018)
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Adam Khalife
Visiting Grad Student (2017)
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Tracy Audisio
Research Intern (2017)
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Aina Urano
Research Intern (2016)
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Kotaro Fujiyoshi
Research Intern (2016)
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Tori McGruer
Research Intern (2016)
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Brett Morgan
Research Intern (2015)
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Guilherme Baiao
Research Intern (2013)
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Sandrine Burriel
Research Intern (2013)
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Benjamin Blanchard
Research Intern (2013)