Robert Pyron

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Robert F. Griggs Associate Professor

George Washington University

United States

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Robert F. Griggs Associate Professor at George Washington University in the United States specializes in evolutionary biology and herpetology. His recent research includes the assembly of genomes in lungless salamanders, non-invasive eDNA detection techniques, and phylogenetic analyses within the Plethodontidae family. He has also contributed to studies on the macroevolution of snakes and has addressed nomenclatural issues within the anaconda genus.

Recent Grants

Grant: Close

Collaborative Research: Genome-Scale Phylogeographic Analysis of Desmognathus Salamanders

Open Date: 2017-09-01

Close Date: 2020-08-31

Grant: Close

Collaborative Research: VertLife Terrestrial: A complete, global assembly of phylogenetic, trait, spatial and environment characteristics for a model clade

Open Date: 2014-10-01

Close Date: 2018-09-30

Grant: Close

Postdoctoral Research Fellowships in Biology for FY 2009

Open Date: 2009-10-01

Close Date: 2011-09-30

Articles (20)

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2025

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2025

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2025

Snakes and lizards (Squamata) represent a third of terrestrial vertebrates and exhibit spectacular innovations in locomotion, feeding, and sensory processing. However, the evolutionary drivers of this radiation remain poorly known. We infer potential causes and ultimate consequences of squamate macroevolution by combining individual-based natural history observations (>60,000 animals) with a comprehensive time-calibrated phylogeny that we anchored with genomic data (5400 loci) from 1018 species. Due to shifts in the dynamics of speciation and phenotypic evolution, snakes have transformed the trophic structure of animal communities through the recurrent origin and diversification of specialized predatory strategies. Squamate biodiversity reflects a legacy of singular events that occurred during the early history of snakes and reveals the impact of historical contingency on vertebrate biodiversity.

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2024

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2024

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2024

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2024

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2024

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2024

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2024

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2023

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2023

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2023

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2022

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2022

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2022

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2022

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2022

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2022

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2022

Collaborators (11)

Annemarie Ohler

Professor

Muséum National d'Histoire Naturelle

FRANCE

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Timothy Colston

Assistant Professor

University of Puerto Rico-Mayaguez

UNITED STATES

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Aaron Bauer

Professor

Villanova University

UNITED STATES

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Gabriel Costa

Assistant Professor

Auburn University at Montgomery

UNITED STATES

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Nicolas Di-Poi

University of Helsinki

FINLAND

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SALVADOR ARENAS-CASTRO

Profesor Permanente Laboral

Universidad de Córdoba; Area de Ecología; Departamento de Botánica Ecología y Fisiología Vegetal

SPAIN

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Sandy Kawano

Assistant Professor

George Washington University

UNITED STATES

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Pascal Title

Assistant Professor

Stony Brook University

UNITED STATES

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Jeramiah Smith

Associate Professor

University of Kentucky

UNITED STATES

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Christopher Murray

Southeastern Louisiana University

UNITED STATES

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Daniel L. Rabosky

University of Michigan

UNITED STATES

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Robert Pyron

Research Interests

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About

Recent Grants

Articles (20)

The first complete assembly for a lungless urodelan with a “miniaturized” genome, the Northern Dusky Salamander (Plethodontidae: Desmognathus fuscus)

Nested PCR amplification of the mitochondrial hypervariable region for non-invasive eDNA detection of Cryptobranchus alleganiensis

Complex Hybridization in a Clade of Polytypic Salamanders (Plethodontidae: Desmognathus) Uncovered by Estimating Higher-Level Phylogenetic Networks

The macroevolutionary singularity of snakes

Applying 3D Models of Giant Salamanders to Explore Form–Function Relationships in Early Digit-Bearing Tetrapods

Testing molecular date estimates using an ecological and vicariant case study in treefrogs: The Geological‐Ecological Molecular Calibration

The specimens of green anaconda, Boa murina Linnaeus, 1758 (Squamata, Serpentes, Boidae, Eunectes), from the collection of Albertus Seba, and recommendations for tracing historical specimens

Nomenclatural problems raised by the recent description of a new anaconda species (Squamata, Serpentes, Boidae), with a nomenclatural review of the genus Eunectes

Systematic revision of the Eyelash Palm-Pitviper Bothriechis schlegelii (Serpentes, Viperidae), with the description of five new species and revalidation of three

Discerning structure versus speciation in phylogeographic analysis of Seepage Salamanders (Desmognathus aeneus) using demography, environment, geography, and phenotype

Systematic revision of the Spotted and Northern Dusky Salamanders (Plethodontidae: Desmognathus conanti and D. fuscus), with six new species from the eastern United States

Speciation Hypotheses from Phylogeographic Delimitation Yield an Integrative Taxonomy for Seal Salamanders (Desmognathus monticola)

A systematic revision of the Shovel-nosed Salamander (Plethodontidae: Desmognathus marmoratus), with re-description of the related D. aureatus and D. intermedius

Systematics of the Ocoee Salamander (Plethodontidae: Desmognathus ocoee), with description of two new species from the southern Blue Ridge Mountains

Allocation of Salamandra auriculata Holbrook, 1838, with a new species of swamp-dwelling dusky salamander (Plethodontidae: Desmognathus) from the Atlantic Coastal Plain

Nomenclatural solutions for diagnosing ‘cryptic’ species using molecular and morphological data facilitate a taxonomic revision of the Black-bellied Salamanders (Urodela, Desmognathus ‘quadramaculatus’) from the southern Appalachian Mountains

The taxonomic and nomenclatural status of the nomina Salamandra fusca Green, 1818 and Salamandra quadramaculata Holbrook, 1840 (Amphibia, Urodela)

Empirical and philosophical problems with the subspecies rank

A nomenclatural and taxonomic review of the salamanders (Urodela) from Holbrook’s North American Herpetology

A new, narrowly endemic species of swamp-dwelling dusky salamander (Plethodontidae: Desmognathus) from the Gulf Coastal Plain of Mississippi and Alabama

Collaborators (11)

Annemarie Ohler

Timothy Colston

Aaron Bauer

Gabriel Costa

Nicolas Di-Poi

SALVADOR ARENAS-CASTRO

Sandy Kawano

Pascal Title

Jeramiah Smith

Christopher Murray

Daniel L. Rabosky

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