Gustavo A. Ballen

YouTube video by SolisLemus-lab El Zoominario: How do we tell the time of macroevolution? -- Gustavo Ballen

This outreach talk from last year just came out. Huge thanks to Claudia Solis-Lemus for inviting me to El Zoominario. www.youtube.com/watch?v=9qdL...

@rodrigoichthys.bsky.social

eu quero SITES das coisas, com contato via e-mail e telefone, especialmente lojas, serviços etc e não perfil de Instagram com preço inbox

also quero tutoriais e análises em escrito, que eu possa dar um control f, não em video que tu fica caçando o trecho de 5 segundos que te interessa

tbea: tools for pre- and post-processing in bayesian evolutionary analyses Abstract. Estimating phylogenies in which branch lengths are expressed in units of absolute time is crucial for testing hypotheses in evolutionary biology.

Our paper (with @sreinales.bsky.social) finally out today in the Evolutionary Journal of the Linnean Society. It feels like a birthday present 🤪 academic.oup.com/evolinnean/a...

It's not possible to use continuous in MrBayes at the moment despite the confusing information regarding this over the internet (been there some years ago). That's work in progress by Chi Zhang, so eventually it will be available.

Our latest paper on Farlowella from Colombia in Journal of Fish Biology, the result of the undergrad dissertation by my former student Omar Melo. Supported by @agenciafapesp.bsky.social Universidad Javeriana, Museu de Zoologia da USP, and UNESP Botucatu. onlinelibrary.wiley.com/doi/10.1111/...

Phylogenetic networks empower biodiversity research | PNAS Reticulate evolution has long been recognized as a key mechanism that contributes to genetic and trait diversity. With the widespread availability ...

Phylogenetic networks empower biodiversity research | PNAS www.pnas.org/doi/10.1073/...

Colombian palaeontology

Multifaceted evolution of dental morphology during the diversification of the bat superfamily Noctilionoidea https://www.biorxiv.org/content/10.1101/2025.06.10.658888v1

The tragic landslide in Blatten gives me the excuse to tell you the story of how we found out Ice Ages existed. It's a cool story and the most important bit is rather similar to what's happening now.

Fascinating thread! Thank you!

💯

Everyone Is Cheating Their Way Through College ChatGPT has unraveled the entire academic project.

“Massive numbers of students are going to emerge from university with degrees, and into the workforce, who are essentially illiterate…Both in the literal sense and in the sense of being historically illiterate and having no knowledge of their own culture, much less anyone else’s.”

Bayesian Selection of Relaxed-Clock Models: Distinguishing between Independent and Autocorrelated Rates Abstract. In Bayesian molecular-clock dating of species divergences, rate models are used to construct the prior on the molecular evolutionary rates for br

Happy to share that my PhD paper published in Systematic Biology. My paper explores the #Asymptotictheory of Bayesian rate model selection and explore how misspecified calibrations can affect this. Also test rate model selection with large #Phylogenomes

Link below:
academic.oup.com/sysbio/advan...

Ammonite art by the brilliant @jwmorenob.bsky.social who is always happy to take commissions!

I'm happy to see my latest preprint out on stratigraphic intervals, a topic I've been interested in since my first year as PhD student. Available in the brand-new StratIntervals.jl (github.com/gaballench/S...) @julialang.org package. Preprint on @biorxiv-evobio.bsky.social doi.org/10.1101/2025...

A flexible Bayesian method for estimating stratigraphic intervals and their co-occurrence in time https://www.biorxiv.org/content/10.1101/2025.02.13.638199v1

Fantastic analogy!

🙋🏽‍♂️

First time in four years that I don't ☺️

Fossil Freshwater Fishes from the Pliocene of northern Colombia and the Palaeogeography of northern South America Freshwater fishes from northern Colombia are reported from the Sincelejo and Ware formations, of Pliocene age. A total of ten taxa have been identified comprising two orders, five families, and nine g...

I'm happy to share our latest preprint on fossil fishes from Colombia, which represents the last piece of my PhD thesis that was still to be published. www.biorxiv.org/content/10.1... @agenciafapesp.bsky.social @uspoficial.bsky.social @sbbe.bsky.social #cienciacriolla

Gracias!

🙋🏽‍♂️

Fossil Freshwater Fishes from the Pliocene of northern Colombia and the Palaeogeography of northern South America https://www.biorxiv.org/content/10.1101/2024.12.18.629252v1

Honoured to have won the prize to best presentation in methods and software at the Congresso Brasileiro de Biologia Evolutiva

Very excited to see the dissertation of my first undergrad student already available as a preprint (and submitted as well).

Thank you Michael!

@gaballench.bsky.social

Phylogenetic and Biogeographic History of the Snooks (Centropomidae: Carangiformes) Spanning the Closure of the Isthmus of Panama Aim Amphiamerican New World fishes provide a unique opportunity to explore the impact of geological processes and the formation of geographic barriers on biological diversification across both spati...

I'm happy to share our latest paper which was just published in Journal of Biogeography on the impact of the Panama Isthmus Closure on the evolution of Centropomids and related fishes. onlinelibrary.wiley.com/doi/10.1111/...