Our Team

  • 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.

  • 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.

  • 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

  • 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.

  • 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.

  • 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.

  • 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

  • Riou Mizuno

    Postdoc (2023-2025)

  • Christine Sosiak

    JSPS Fellow (2023-2025)

  • Adrian Richter

    JSPS Postdoc (2023-2024)

  • Larisa Kiselva

    Staff Scientist (2021-2025)

  • Nurit Eliash

    Postdoc (2021-2022)

  • Dan Warren

    Staff Scientist (2021-2022)

  • Alexandre Casadei Ferreira

    Postdoc (2020-2024)

  • Jamie Kass

    JSPS Postdoc (2019-2023)

  • Susan Kennedy

    Postdoc (2018-2021)

  • Nao Takashina

    JSPS Postdoc (2017-2020)

  • Francisco Hita Garcia

    Staff Scientist (2016-2022)

  • Nick Friedman

    Postdoc (2015-2020)

  • Clive Darwell

    Postdoc (2015-2018)

  • Georg Fischer

    Postdoc (2014-2020)

  • Béatrice Lecroq

    Postdoc (2012-2014)

  • Masashi Yoshimura

    Staff Scientist (2012-2018)

  • Benoit Guénard

    Postdoc (2012-2014)

Lab Alumni

Graduate Students

  • Lazzat Aibekova

    PhD 2025

  • Shubham Gautam

    PhD 2025

  • Julian Katzke

    PhD 2025

  • Yazmín Zurápiti

    PhD 2025

  • Gaurav Agavekar

    PhD 2025

  • Evropi Toulkeridou

    PhD 2021

  • Yuka Suzuki

    PhD 2021

  • Cong Liu

    PhD 2019

  • Yafei Mao

    PhD 2019

  • Patricia Wepfer

    PhD 2019

Lab Alumni

Technical Staff

  • Kenneth Dudley

    Research Computing Technician (2014-2020)

  • John Deyrup

    Research Technician (2013-2014)

  • Julia Janicki

    Research Computing Technician (2015-2017)

  • Fumika Azuma

    Research Technician (2018-2023)

  • Kosmas Deligkaris

    Research Computing Technician (2019-2023)

  • Dimitris Petsopoulos

    Research Computing Technician (2024-2025)

  • Miyuki Suenaga

    Research Technician (2021-2025)

  • Azumi Kudaka

    Research Assistant (2023-2025)

  • Mayuko Suwabe (2016-2019)

    Research Technician

  • Takuma Yoshida

    Research Technician (2015-2019)

Lab Alumni

Interns and Visiting Students

  • Jocelyn Wang

    Research Intern (2024-2025)

  • Hlib Burtsev

    Research Intern (2024)

  • Arthur Matte

    Research Intern (2023)

  • Henry Cerbone

    Research Intern (2023)

  • Jordan Drapin

    Visiting Grad Student (2023)

  • Leo Tozetto

    Research Intern (2023)

  • Minsoo Dong

    Research Intern (2023)

  • Kaylin Chong

    Visiting Grad Student (2023)

  • Sam Ross

    Visiting Grad Student (2020)

  • April Lamb

    Research Intern (2019)

  • Kelvin Chen

    Research Intern (2019)

  • Zachary Lieberman

    Research Intern (2018)

  • Adam Khalife

    Visiting Grad Student (2017)

  • Tracy Audisio

    Research Intern (2017)

  • Aina Urano

    Research Intern (2016)

  • Kotaro Fujiyoshi

    Research Intern (2016)

  • Tori McGruer

    Research Intern (2016)

  • Brett Morgan

    Research Intern (2015)

  • Guilherme Baiao

    Research Intern (2013)

  • Sandrine Burriel

    Research Intern (2013)

  • Benjamin Blanchard

    Research Intern (2013)