JOINT MEETING OF ICHTHYOLOGISTS AND HERPETOLOGISTS JULY 24-28, 2019 SNOWBIRD, UT - SNOWBIRD SKI AND SUMMER RESORT ABSTRACTS Dain - Hylton fgf 729 Poster Session II, Event Center – The Snowbird Center, Saturday 27 July 2019 Jonathan Dain, Sam Fellows, Tod Reeder San Diego State University, San Diego, CA, USA Morphological and mitochondrial datasets contradict subspecies divisions of Crotalus cerastes Sidewinder Rattlesnakes (Crotalus cerastes) are a widespread species currently split into three morphologically-defined subspecies (based on number of scale rows, proximal rattle lobe color, and number of ventral scales) each in one of three North American warm deserts. Previous phylogenetic studies using mitochondrial data support five regional clades (one each in northern and southern areas of the Mohave Desert, northern and southern areas of the Sonoran Desert, and the Colorado Desert) that are not congruent with the current subspecies. Given that the relationships among these mitochondrial clades vary among studies, addressing differences among datasets is a critical component in understanding the species limits, phylogenetic relationships, and diversification history within C. cerastes. We analyzed an existing morphological dataset to explore the extent of congruence between the traditional subspecies and mitochondrial clades. This dataset consisted of ~700 individuals, collected across the full range of C. cerastes, and eight characters: scale rows counts, ventral scale counts, head length, tail length, body blotch counts, and tail ring counts. Principal component analysis of the morphological data does not support the boundaries between the subspecies, nor does morphology appear to correlate with the mitochondrial clades. The disagreement between these datasets suggests that integrating these datasets for species delimitation and the exclusive use of mitochondrial data may be inappropriate for describing species limits within Sidewinders. Future studies will determine whether the geographic structure in the morphological data is better explained by variation in environmental and/or genomic data. ____________________________________________________________________________ 690 AES Reproduction & Life History, Alpine A,B,C – The Snowbird Center, Friday 26 July 2019 Toby Daly-Engel1, Yannis P. Papastamatiou2 1Florida Institute of Technology, Melbourne, Florida, USA, 2Florida International University, Miami, Florida, USA Integrating Genetics and Telemetry to Resolve Discrepancies in Sex-Biased Dispersal in Sharks In recent years, there has been a discrepancy in our understanding of shark movement patterns between results from studies using telemetry or genetic methods. Molecular studies, including several global and range-wide, have shown high connectivity across long (>1000 km) distances in male-inherited but not female-inherited genes of several species, though such data are often presented alongside confoundingly fine-scale genetic structure in both sexes. This has led to the conclusion that shark dispersal is male-biased as a rule, with females constrained by philopatry to nursery habitats at the expense of foraging opportunities elsewhere, while males are unconstrained and therefore cosmopolitan. Yet a number of telemetry studies have shown that adults of both sexes consistently make regular long-distance movements, and adult males have been detected near nursery habitats. Here, we integrate findings from genomic and telemetry studies to form a more complete picture of habitat bias and dispersal constraints in sharks. Taken together, these data point to a system where dispersal is less sex-biased than initially thought in wider-ranging species. Instead, both males and females may be constrained by natal philopatry, and may migrate similar distances to optimize foraging and reproductive opportunities, though males may be more cosmopolitan with regards to mating. ____________________________________________________________________________ 272 SSAR SEIBERT SYSTEMATICS AND EVOLUTION AWARD II, Ballroom 2 – Cliff Lodge, Friday 26 July 2019 Hayden R. Davis1, Aaron M. Bauer1, Todd R. Jackman1, Indraneil Das2 1Villanova University, Villanova, PA, USA, 2University of Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia Biogeography and Cryptic Diversity Within Bornean Cyrtodactylus Species Investigating cryptic diversity within the gekkonid genus Cyrtodactylus has led to a drastic increase in the number of recognized species in the genus. Throughout their expansive range, documented diversity has rapidly increased, yet the Sundanese island of Borneo has remained largely unexplored. We generated the first molecular phylogeny focusing on Bornean Cyrtodactylus species, which revealed cryptic species and provided the genetic dataset necessary to investigate the biogeographic role of Borneo in the range expansion of the genus. We discovered that the small bodied forest-dwelling species in Borneo, which bears strong resemblance to other species throughout the range of the genus, is both distinct from those in other regions and is comprised of multiple deeply divergent lineages on the island. Based on more than 60 specimens examined in this complex, no unambiguously diagnostic characteristics could be identified. However, using statistical methods to look for variation, we show that each lineage occupies a distinct region of morphospace. Despite minimal morphological support for delineating the species, both the mitochondrial (ND2) and nuclear (RAG1, MXRA5, PDC) phylogenies support the presence of multiple independent lineages inhabiting the island. Incorporating additional sequences also enabled us to generate a time-calibrated phylogeny focused on the Bornean species and conduct a biogeographic analysis of the group to better assess Borneo’s role in the eastward expansion of the genus. The inclusion of new genetic samples has enabled us to establish well-supported phylogenetic trees to uncover Borneo’s cryptic diversity and elucidate its critical role in the historical biogeography of Cyrtodactylus. ____________________________________________________________________________ 424 Ichthyology Systematics I, Cottonwood A-D – The Snowbird Center, Sunday 28 July 2019 Matthew Davis1, W. Leo Smith2 1St. Cloud State University, St. Cloud, MN, USA, 2University of Kansas, Lawrence, KS, USA Evolution of Ray-finned Fishes into the Deep Sea Over one sixth of all marine fishes live at depths below 200 meters in oceans across the world. These deep-sea fishes have a diversity of fascinating evolutionary traits that have repeatedly evolved in fishes found at these depths. In this study we provide a temporal hypothesis of ray- finned fishes based on molecular data to review and investigate the repeated evolution of adaptations associated with deep-sea fishes and habitat transitions into and out of deep-sea environments. Little is known about the macroevolutionary patterns and processes associated with diversification in the deep sea, and we further investigate macroevolutionary questions regarding the wide-spread dispersal and subsequent diversification of fishes into deep-sea habitats. ____________________________________________________________________________ 287 ASIH/HL/SSAR Symposium: Professional Women in Herpetology: Lessons and Insights, Ballroom 1 – Cliff Lodge, Saturday 27 July 2019 Alison Davis Rabosky University of Michigan, Ann Arbor, MI, USA Building a Tangled Bank: Mimics, Models, and Michigan The University of Michigan has a long legacy of women in Herpetology, beginning with Helen Gaige (former editor of Copeia and co-namesake of ASIH’s Gaige Fund Award) who helped found the UM Museum of Zoology Division of Reptiles and Amphibians and served as a curator until 1945. Today, I am one of the curators of this legendary collection and an Assistant Professor in Ecology and Evolutionary Biology. My lab takes integrative approaches to studying the ecology and evolution of reptiles and amphibians, tackling questions from disease ecology and conservation to genomics and behavior. Using predator defense in snakes, I will show how our lab brings together quantitative data on morphology, behavior, and gene expression to study the evolution of coral snake mimicry. By using phylogenetic comparative approaches to reconstruct the timing and trajectories of how each trait evolves across many independent origins of the mimetic phenotype, our work creates an explicit framework for testing hypotheses about how and why mimicry evolves. One reason that we are able to do this research on a large scale is due to the incredible collaborative effort of students across both UM and Latin America, who have worked together on collection expeditions that produce thousands of museum-vouchered “super” specimens that fuel dozens of projects across institutions. This investment in the future of herpetology builds upon the foundation laid by the Gaiges nearly a century ago, demonstrating how commitment to student-led opportunities is a powerful way for our field to promote diversity and inclusivity. ____________________________________________________________________________ 765 Poster Session I, Event Center – The Snowbird Center, Friday 26 July 2019 Ashley Dawdy, Dean Grubbs, Cheston Peterson, Bryan Keller Florida State University, Tallahassee, FL, USA The Effect of Tidal and Diel Cycles on Spatial Use Patterns of Bull Sharks (Carcharhinus leucas) and Bonnetheads (Sphyrna tiburo) Apalachicola Bay is a national estuarine research reserve and biodiversity hotspot in the