Juan Liu 

Principal Investigator

Assistant Adjunct Professor, Department of Integrative Biology (IB)

Assistant Curator, University of California Museum of Paleontology (UCMP)

Research Associate, American Museum of Natural History (AMNH)


Liu earned her M.S. from the Institute of Vertebrate Paleontology and Paleoanthropology (China) and PhD from the University of Alberta (Canada), studying fossil fish. Liu then spent several years as a visiting scholar at the American Museum of Natural History (USA). Prior to joining the IB and UCMP, she had been an assistant professor at the State University of New York at Buffalo, where she taught anatomy.  She enjoys her research on the evolution of fossil fishes and the functional anatomy of the auditory system. In her leisure time, she enjoys practicing Taiji. 


Chrisy Jiyun Yoon

Medical Student at University of Buffalo


Jiyun (Chrisy) Yoon is a third year medical student at Jacobs School of Medicine and Biomedical Sciences, University at Buffalo. She is currently working with Dr. Liu to model sound resonance patterns in the external ear canal using cadaver CT scans. Her research interests include mechanisms of conductive hearing in humans and comparative anatomy of hearing structures across vertebrates. She attended Duke University for undergrad and double majored in Evolutionary Anthropology and Music Performance. She is currently interested in Family Medicine and hopes to open her own clinic for underserved patients in the future.  

Jennifer Hoeflich

Graduate Student


Jennifer Hoeflich is a second year graduate student in the department of Integrative Biology, whose thesis research is focused on conductive hearing in Ictalurid catfishes, particularly how ecological factors influence the morphology and function of their multi-ossicle chain. Jennifer went to the University of Florida for undergrad and did research with the Florida Museum of Natural History. Currently doing research on the evolution and function of the Weberian apparatus along with working in the UCMP collections on fossil fishes. 

Derrick Leong

Graduate Student


Derrick Leong is a first-year graduate student in the Integrative Biology department at UC Berkeley. He attended UC San Diego as an undergraduate and received his bachelor's degree in Geology at the Scripps Institute of Oceanography. Some of his research interests include phylogenetics, functional morphology, and the evolution of stem-tetrapods. His current research is on lateral line evolution in Devonian fishes and stem-tetrapods of the Red Hill, Nevada locality. During his free time, Derrick enjoys playing sports, the violin, and video games.

Ian Strieter




Rangarajan Bharadwaj



Ranga is currently a sophomore at Cal and he hopes to graduate as a public health and IB major. He joined Liu labs over the past summer and is broadly interested in understanding the evolution of Vertebrate hearing as well as developing new analytical processes to better understand the fossil record. Ranga has recently done some work related to CT imaging and comparative anatomy and hopes to apply that in his future work. He loves collecting fossils and rocks and in his free time, his favorite activity is either playing music or swimming.


Katherine Walton



Katherine Walton is a second-year undergraduate in the College of Letters and Science, looking forward to majoring in integrative biology with a minor in marine science. Her research work centers on morphometric analysis of fish skeletons belonging to the Cypriniformes order. The data will indicate how various niche types influence body morphology among extant species in this order. Outside the lab, she enjoys reading, competing in underwater robotics, and learning about all species of penguin.


Tony Zehua Zhou



Zehua (Tony) Zhou is a second-year undergraduate in the College of Letters and Science, looking forward to majoring in Integrative Biology and Data Science. He is currently working on the identification of a fish fossil found in Qasr el-Sagha Formation, Egypt. Besides academics, Tony also shows interest in cooking and basketball.

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