- Author: Kathy Keatley Garvey
She is the first UC Davis-affiliated scientist to win the award. She will receive a certificate, 1250 pounds ($1,624) and an expense paid trip to London to receive the award at the Ento 19 conference, set Aug. 20-22 at the London School of Hygiene and Tropical Medicine.
The Royal Entomological Society, an international organization devoted to the study of insects, was founded in 1833 as the Entomological Society of London. Its mission is to disseminate information about insects and improve communication between entomologists.
Gillung's work on spider flies, involving genomics, phylogenetics, systematics, and comparative analyses, “has increased our understanding of the biological patterns and processes that have shaped our planet's biodiversity,” wrote her major professor and award nominator Lynn Kimsey, director of the Bohart Museum of Entomology and a professor of entomology, UC Davis Department of Entomology and Nematology.
Gillung received her doctorate in entomology from UC Davis in December 2018, studying with Kimsey and mentor Shaun Winterton, insect biosystematist, California Department of Food and Agriculture, and a member of the Royal Entomological Society. Gillung also collaborated with ant specialist and taxonomist Phil Ward, professor, UC Davis Department of Entomology and Nematology.
Gillung is now a postdoctoral associate at Cornell University in the Bryan Danforth lab, where she is researching Apoidea (stinging wasps and bees) phylogenomics, evolution and diversification.
Her dissertation, “Systematics and Phylogenomics of Spider Flies (Diptera, Acroceridae),” focused on the evolution, conservation, biology, and taxonomy of spider flies, a group of spider natural enemies,
Gillung's taxonomic work on spider flies, described as landmark, included identification keys and morphology-based diagnoses of species using modern techniques of cybertaxonomy—the application of the internet, digital technologies, and computer resources to increase and speed up the discovery and cataloging of new species, Kimsey wrote. “Using cybertaxonomic tools, Jessica described 25 new spider fly species herself, and in collaboration with fellow entomologists, three fossil species from Baltic amber, described in her first dissertation chapter. Cybertaxonomy is a powerful tool that allows researchers and citizen scientists to collaborate in real time and across great distances to increase the speed and efficiency of biodiversity discovery.”
“Jessica unraveled the functional and ecological implications of key morphological traits, as well as their distribution across the Tree of Life,” Kimsey said. “In her doctoral dissertation, she established new homologies for the wing venation of spider flies and conducted detailed and assiduous dissections of male reproductive structures (i.e., genitalia) to understand homologies, demonstrating that morphological traits are dynamically evolving systems useful for both classification and inference of evolutionary history.”
Since many insect species are threatened, geographically restricted, or relatively rare in nature, Gillung performed non-destructive DNA extraction of specimens housed in entomological collections, including the Bohart Museum of Entomology. Gillung collected molecular data from decades-old insects without damaging the specimens.
Gillung's multifaceted research on genomics, bioinformatics, phylogenetics, plant-pollinator interactions, and biodiversity discovery drew more $120,000 in grants and awards while at UC Davis.
The UC Davis alumnus is known for her “phenomenal leadership activities, her nearly straight-A academic record (3.91 grade point average), her excellence as an entomologist and teacher, her public service and outreach programs (from 2013 to 2018, she reached more than 20,000 people at UC Davis-based events) and her incredible publication record,
Kimsey said. “She published 11 refereed publications related to her thesis in very strong journals. Most entomologists do not publish nearly that much, even as a postdoctoral scholar or a junior faculty member.”
A recipient of numerous other awards, Gillung won the prestigious international award for “Best Student Presentation Award” at the ninth annual International Congress of Dipterology, held in 2018 in Windhoek, Namibia. She also won the 2019 Early Career Award from the Pacific Branch, Entomological Society of America (PBESA) and the 2018 PBESA Student Leadership Award. PBESA encompasses 11 western states, U.S. territories and parts of Canada and Mexico.
Gillung was a key member of the 2015 PBESA championship Linnaean Team that went on to win the ESA national championship. The Linnaean Games are lively question-and-answer, college bowl-style competition on entomological facts played between university-sponsored student teams.
Gillung also collaborated on a project aimed at encouraging students to attend and participate in the Orlando, Fla., meeting of the International Congress of Entomology. She and several colleagues published a paper entitled “From the Students to the Students: Why YOU need to Attend ICE 2016.”
The Royal Entomological Society will publish her biography and photo in its Antenna magazine, on the society website, and in the Marsh Christian Trust Award brochure.
- Author: Kathy Keatley Garvey
She delivered her presentation on “Phylogenetic Relationships of Spider Flies (Acroceridae) – Discordance, Uncertainty and the Perils of Phylogenomics.” Acrocerid adults are floral visitors, and some are specialized pollinators, while the larvae are internal parasitoids of spiders.
Approximately 350 delegates attended the conference; the scientists focus on the Diptera order, which includes houseflies, mosquitoes, and gnats. Gillung was among 40 students presenting their research.
Gillung studies with major professor Lynn Kimsey, director of the Bohart Museum of Entomology and professor of entomology, UC Davis Department of Entomology and Nematology; mentor Shaun Winterton of the California Department of Food and Agriculture; and collaborator Phil Ward, UC Davis professor of entomology.
UC Davis doctoral students Charlotte Herbert Alberts and Socrates Letana, who both study with Kimsey, also presented their work; Alberts delivered an oral presentation on her research (she studies Asilidae (Assassin flies), and Letana displayed a poster on bot flies.
Presenting the award to Gillung was Professor Thomas Pape of the Natural History Museum of Denmark and chair of the Council for the International Congresses of Dipterology, which organizes the conferences. The next Congress takes place in 2022 in California.
In her abstract, Gillung described spider flies “as a monophyletic group of lower Brachycera currently classified into three subfamilies, 55 genera and ca 530 species.”
“The group has long been considered a rogue taxon and its placement within the Diptera tree of life remains uncertain,” she wrote. “Phylogenetic relationships among lineages of spider flies are by contrast relatively well established, with hypotheses proposed based on molecular data from both Sanger and high-throughput sequencing. Phylogenomic estimation of spider fly relationships yields different topologies, depending on whether data is coded and analyzed as nucleotides or as amino acids. The most significant difference among the two data types is in the monophyly of Panopinae; a morphologically and ecologically recognizable group, that is recovered as monophyletic only in the analyses of nucleotides. This study uses Acroceridae as a system to explore the effects of potential confounding factors in phylogenomic reconstruction. This research takes advantage of modern and powerful statistical approaches, including posterior predictive simulation, to understand the effects of conflict, uncertainty and systematic error in the estimation of evolutionary relationships using the standard phylogenomic toolkit.”
Gillung, to receive her doctorate this month, will present her exit seminar on “Evolution of Fossil and Living Spider Flies (Diptera, Acroceridae): A Tale of Conflict and Uncertainty” at 2 p.m., Friday, Dec. 14 in 122 Briggs Hall.
"Parasitoid flies," Gillung wrote in her abstract for her Dec. 14 seminar, "are some of the most remarkable, yet poorly known groups of insects. Represented by over 10,000 species distributed in 21 families, dipteran parasitoids comprise over 100 independent lineages, offering an unparalleled system to understanding the origin, evolution and diversification of the parasitoid life history. My dissertation research unraveled the systematics, evolution and biology of a lineage of dipteran parasitoids specialized in spiders, Acroceridae, commonly known as spider flies. My research resulted in a monograph of fossil spider flies, and a robust hypothesis for the pattern and timing of spider fly evolution based on high throughput sequencing. Through the combination of DNA sequence data obtained via Sanger sequencing with morphological characters, I also estimated their relationships among spider fly genera using an extensive taxon sampling which culminated in a new taxonomic classification for the family.”
Gillung has accepted a postdoctoral position at Cornell University, Ithaca, beginning Jan. 2. She will be working with Bryan Danforth on Apoidea (stinging wasps and bees) phylogenomics, evolution and diversification.
She recently was named the recipient of the prestigious 2018 Student Leadership Award, presented by the Pacific Branch, Entomological Society of America (PBESA), which represents 11 states, seven U.S. territories, and parts of Canada and Mexico.
A native of Brazil, Jessica holds a bachelor's degree in biology from the Federal University of Paraná, Curitiba, Brazil and a master's degree in zoology from the University of São Paulo, Brazil. She speaks four languages fluently: Portuguese, Spanish, English and German.