Matheus Januario

1 week left to get your image in for Evolution 2026 logo contest! www.evolutionmeetings.org/2026-logo-co...

ecoevojobs.net 2025-26

UPDATE: The 2025-2026 list of faculty and postdoc positions in ecology and evolutionary biology is out! Be sure to check out this active and helpful community run resources! docs.google.com/spreadsheets...

Fossil stickleback fishes preserved on white rock in a black specimen tray.

The back half of a fossil bird, preserved on light colored rock.

For #FossilFriday, a visit to the Truckee Formation of Nevada: sticklebacks and a grebe in UMMP. Annual layers in these lake sediments give a precise relative chronology for fossils from different levels, providing kyr resolution essential for bridging paleontological and biological perspectives.

Brazilians at #Evol2025! @mjanuario.bsky.social and I are planning ab informal meetup tomorrow after the poster session (~7:30pm) at Creature comforts, a brewery 10 min from the conference center. Non-Brazilians who want to mingle and hear some Portuguese are always welcome!! 🇧🇷🇧🇷🇧🇷

@alencarlrv.bsky.social @bpwaldron.bsky.social

evolved: Open Software for Teaching Evolutionary Biology at Multiple Scales Through Virtual Inquiries "Evolutionary Virtual Education" - 'evolved' - provides multiple tools to help educators (especially at the graduate level or in advanced undergraduate level courses) apply inquiry-based learning in g...

Check out evolved on CRAN (cran.r-project.org/web/packages...) and GitHub (github.com/mjanuario/ev...)

Hope you were able to catch @mjanuario.bsky.social’s #Evol2025 talk about his evolution education package, evolved! My friends are so smart

Come watch my talk at #Evol2025 this Monday @ 9:45am, at the Phylogenetic Methods Development I section. I'll be talking about methodological considerations on inferring a complete phylogenetic tree of Canidae. Who doesn't want to hear about dogs??? (and fossilized birth-death models, obviously...)

Jero introducing himself in a mint green auditorium with a screen reading "2025 Esteemed Doctoral Candidates."

Sanaa introducing herself in a mint green auditorium with a screen reading "2025 Esteemed Doctoral Candidates."

Congrats to two paleontological recipients of the prestigious Rackham Predoctoral Fellowship: Jerónimo Morales Toledo and Sanaa El-Sayed! 🌿🐟

9 images of animals rendered in 3d from CT scans. top row: a mouse skeleton, a Jamaican fruit bat skin, a Jamaican fruit bat skeleton, snake skull second row: a shrew muscle image, a snake brain, a bowfin fish bottom row: a bat skull, a rodent skull

Here's a collage of specimens scanned and segmented at the UMMZ for the bluesky community to enjoy!

Announcing the 2024 ProQuest Distinguished Dissertation Award Winners » Rackham Graduate School: University of Michigan The Rackham Graduate School is pleased to announce this year’s winners of the ProQuest Distinguished Dissertation Awards.

Its an honor to be awarded the ProQuest Distinguished Dissertation Award by the University of Michigan for my PhD work 🐟🧠

rackham.umich.edu/discover-rac...

A score sheet for my 1999 NSF GRFP. The reviewers did not think highly of my application.

It's GRFP season again, so I thought I'd share my rejection letter (from 1999!). Hang tough--it doesn't determine your future.

Northern Wheatear perched on a stump in the middle of a golf course in Belen, NM

Went all the way to the Middle East to try for Northern Wheatear and didn't see a single one, only for one to show up in the middle of New Mexico. Probably a leucorhoa (Greenland) ssp?

Speaking as a paleontologist, we don't need to bring back species long lost to extinction. Modern ecosystems are already stressed without introducing bioengineered monstrosities. Celebrate biodiversity by appreciating & conserving the endless forms most beautiful & wonderful alive in the world today

Eric Hilton and I are busy handling other papers for this volume--keep your eyes peeled for a diverse range of contributions on fossil fishes!

Paleobiology Database Summer 2025 Workshop Application Dates: June 2-5, 2025 (4 days) Location: George Mason University, Fairfax, VA, USA

Do you want to learn how to contribute to and use the Paleobiology Database? 🌎🦕🐚

Look no further - we're now welcoming applications to the 2025 edition of our introductory workshop!

More details here: forms.gle/xQqDEQwwXeTH...

I love the way the paper is all "we were like WTF, why did they do that, so we tried this and OMFG. And then we figured what the hell, we should try this, and you're not going to believe this shit but....."

One week left for applications! (just a simple questionnaire).

Our datapaper "Global Roadkill Data: a dataset on terrestrial vertebrate mortality caused by collision with vehicles" is now online on #ScientificData: nature.com/articles/s41... #RoadEcology @ebdonana.bsky.social

curiosidade: se alguém criasse hoje um perfil de besouros do Brasil e postasse uma espécie única por dia, levaria pelo menos 82 ANOS para passar por todas as que conhecemos 🪲

Januario et al. found no correlation between sexual selection intensity & speciation rates or proxy traits. Because sexual selection intensity has high intraspecific variation and low phylogenetic signal, its macroevolutionary impacts are weak. Read now!
www.journals.uchicago.edu/doi/10.1086/...

We are excited to share our new preprint describing the inclusion of selection models to stdpopsim, our community-maintained library with an extensive catalog of population genetic models. 1/n
www.biorxiv.org/content/10.1...

Reconstructed sea-level rise in the Holocene.

Impressive magnitude of the global Holocene sea-level rise:
"Our results also show that global mean sea-level rise between 11 ka and 3 ka amounted to 37.7 m (2σ range, 29.3–42.2 m)"
www.nature.com/articles/s41...
🧪 ⚒️ #Geology #Geography

Our preprint is out! Kudos to @josanesousa.bsky.social, @gabrielalima19.bsky.social, @perezlouise.bsky.social and undergraduate prodigy Hannah Shof! By comparing Polypterus fin and axolotl limb we find shared and new regeneration programs. @lsuscience.bsky.social
www.biorxiv.org/content/10.1...

New deadline May 15th - would love to see your contributions to this important special issue ...

Fundamental constraints on vertebrate life history are shaped by aquatic–terrestrial transitions and reproductive mode Nature Ecology & Evolution - The authors examine life-history differences between terrestrial versus aquatic vertebrates and their mode of reproduction. They find that land vertebrate life...

Examining life-history differences among vertebrates and their mode of reproduction, Brooks et al. find that land vertebrate life histories are more constrained than aquatic ones, suggesting a wider diversity of reproductive strategies in aquatic habitats than in terrestrial ones

My Obituary of Elisabeth Vrba—out today in Nature in read-only format:

rdcu.be/ediyO

Thanks! :)

Screenshot of MDD2 website

Does your feed need more MAMMALS?! Just in time for #2025MMM, we have what you need:

All new v2.0 of the Mammal Diversity Database just launched!

What's new?
- Preprint on MDD2: doi.org/10.1101/2025...
- Re-vamped website: mammaldiversity.org
- 50,230 species-level synonyms
- 6,759 species total