TJ Firneno Headshot

TJ Firneno

Assistant Professor, Biology

Thomas H. Gosnell School of Life Sciences
College of Science

585-475-6618
Office Location
GOS-A352

TJ Firneno

Assistant Professor, Biology

Thomas H. Gosnell School of Life Sciences
College of Science

Education

BS, Duquesne University; MS, Indiana University of Pennsylvania; PhD, The University of Texas at Arlington

Bio

Dr. Firneno joined the faculty as an assistant professor in 2026. He earned his bachelor's degree in 2011 from Duquesne University, his master's degree in 2016 from Indiana University of Pennsylvania, and his doctorate in 2021 from the University of Texas at Arlington. From 2022-2024, TJ was a postdoctoral research fellow in biology with the National Science Foundation working with Dr. Erica Larson at the University of Denver. He also served as an assistant professor at Juniata College from 2023-2026.

Dr. Firneno is an organismal evolutionary biologist who uses an integrative biodiversity genomics approach to study speciation and biological diversification. His overarching research goal is to understand the adaptive mechanisms by which biodiversity is generated and maintained in response to novelty. He uses a cross disciplinary approach to conduct hypothesis driven research, whereby he integrates emerging trends and tools in several “omic”-based methods (e.g., genomics, transcriptomics, metabolomics), evolutionary ecology, population genetics, and genotype-phenotype associations with organismal biology and natural history to understand how microevolutionary processes drive patterns of diversity at the levels of both the genotype and phenotype, how these patterns are shaped by the surrounding environments, and how these processes translate to larger evolutionary scales. 

Dr. Firneno's teaching has included courses in general biology, genetics and genomics, evolution, and organismal biology. The natural world has always fascinated him and he strives to pass on this passion to others. He integrates both concept-oriented and experiential-learning strategies into his teaching and mentorship to equip students with the ability to think critically, communicate effectively, and engage themselves and others in the wonders of nature and the world around them.

When not teaching or in the lab, Dr. Firneno is usually spending time with his husband and their three cats, traveling and experiencing new places, getting outside for a hike and to take in nature, or just relaxing with a book.

585-475-6618

Areas of Expertise

Select Scholarship

McCammon SD, Chen See JR, Wright JR, Anderson SLC, Russell TJ, Lamendella RM, Firneno TJ Jr. Spatial organization of cutaneous microbiomes reveals putative microbial contributions to host chemical defenses in the American toad. Frontiers in Microbiology 17: 1860796.

Grapin MS, Aleman A, Gonçalves, Emery AH, Firneno TJ Jr, Montooth KL, Meiklejohn CD, Moore EC, Larson EL. The complete genomes of two hybridizing field crickets, Gryllus pennsylvanicus and Gryllus firmus. Journal of Heredity 000(00): esag051.

Firneno TJ Jr, Welsh GT, Gumm J, Larson EL, Tinghitella RM. The evolution of sensory systems after signal change in freshwater threespine stickleback. Biological Journal of the Linnean Society 143(1): blae076.

Firneno TJ Jr, Welsh GT, Nimlos PJ, Larson EL. “I think”: integrating project-based learning and case study to teach fundamentals of evolutionary tree thinking. Evolution: Education and Outreach 16(13).

Firneno TJ Jr, Semenov G, Dopman EB, Taylor SA, Larson EL, Gompert Z. 2023. Quantitative analyses of coupling in hybrid zones.Cold Springs Harbor Perspectives in Biology15(12): a041434.

Firneno TJ Jr, Ramesh B, Maldonado JA, Hernandez-Briones AI, Emery AH, Roelke CE, Fujita MK. 2022. Transcriptomic analysis reveals potential candidate pathways and genes involved in toxin biosynthesis in true toads. Journal of Heredity 113(3): 311-324. 

Currently Teaching

BIOL-365
3 Credits
This course consists of a study of DNA, genes, inheritance, genetic variation, genetic architecture, and change within and among populations. Fundamental genetics topics include DNA, gene, and chromosomal structure and function along with, transmission genetics, Mendelian inheritance patterns, sex-linked inheritance, genetic linkage, and the Hardy-Weinberg Principle. Population based topics will include genetic variation, its importance, how it originates and is maintained as well as inbreeding, random mating, mutation, migration, selection, genetic drift, the effects of small population size, fitness, population subdivision, the shifting balance theory, inter-deme selection, kin selection, neutral theory, molecular evolution, molecular clocks, multi-gene families, gene conversion, artificial selection, the genetic basis of quantitative traits and the fundamental theorem of natural selection.
ENVS-790
1-4 Credits
The thesis option will be available to environmental science graduate students only with prior written approval of program faculty. Students will submit a proposal to a faculty member who agrees to serve as the student's thesis committee chair. The proposal will describe the basic research question to be investigated and the experimental protocols to be employed. Proposals will be reviewed by the program faculty who will give permission to register for thesis credit. This course may be taken several times over the course of a student's graduate program, for variable credits. A written thesis and oral defense are required at the completion of the thesis research.
ENVS-791
1 Credit
Continuation of Thesis
ENVS-795
1-4 Credits
This course is a graduate level, faculty-directed, student project or research involving laboratory or field work, computer modeling, or theoretical calculations that could be considered of an original nature. The level of study is appropriate for students in Environmental Science graduate program.
ENVS-798
1-4 Credits
This course is a faculty-directed tutorial of appropriate topics that are not part of the formal curriculum. The level of study is appropriate for student in the Environmental Science graduate program.