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Marc Tollis

@marcanthonytollis

Evolutionary biologist from Queens. Genomes, phylogenies, TEs, cancer. Musician/drummer, dinosaur. I got kids. Former museum educator. Associate professor at Northern Arizona University

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16.11.2023
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Latest posts by Marc Tollis @marcanthonytollis

Disagreement among Genomic Markers Profoundly Influences Phylogenetic Inference in Squamates https://www.biorxiv.org/content/10.64898/2026.01.06.698024v1

08.01.2026 04:32 πŸ‘ 2 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Disagreement among Genomic Markers Profoundly Influences Phylogenetic Inference in Squamates Phylogenomic-scale studies of the same clades using different markers and methods often support highly confident yet different species trees, obscuring many phylogenetic relationships and hampering co...

New lab preprint! PhD work of @drsimonegable.bsky.social
- 12 million base pairs of DNA βœ…πŸ§¬
- hundreds of species of lizards and snakes βœ…πŸ¦ŽπŸ
- biological, molecular, and artifactual factors confounding phylogenetic inference βœ…πŸ’»
- most ‼️ for your 🦌➑️ protein-coding genes
www.biorxiv.org/content/10.6...

08.01.2026 17:17 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Anuran genome size evolution is driven by relatively recent retrotransposon activity and by life history - BMC Genomics BMC Genomics - Transposable elements (TEs), often referred to as β€˜selfish genetic elements’, hijack their host’s genetic machinery to replicate themselves within the host genome,...

New in BMC Genomics! Genome size in anurans (frogs and toads) ranges from 0.5Gb to 10.0Gb of DNA. John Neddermeyer and I teamed with Andrew Rubio and @adamstuckert.bsky.social and found one type of retrotransposon active over the last ~30my is the likely culprit: link.springer.com/article/10.1...

22.12.2025 20:25 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 1

I’ve been playing with a
now popular A.I. scientific manuscript review tool and it’s cool but imo it seems built on a β€œkeep adding experiments if you want to get this into Nature” mindset. It reads like that kind of reviewer. I wish there was a society journal reviewer option 🀣

14.12.2025 16:32 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Awesome week meeting with our whole team investigating the genomic basis of phenotypic evolution across all squamates at @princetonupress.bsky.social and @amnh.org with my fellow PIs @marcanthonytollis.bsky.social and Frank Burbrink and all our students and postdocs in this enterprise!

21.11.2025 21:25 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

I love how there is a point in every kid's life where in their daily quest for sugar they realize they ain't got time for no Teddy Grahams

08.10.2025 19:43 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Makin moves over here

01.10.2025 23:00 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

no I will not be navigating to your electronic calendar to schedule a meeting with you. You can just tell me when you are available 🀣

unless you are like a dean or a provost, then I get it. But another professor? Cmon

17.09.2025 18:35 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Shrinking to bird size with dinosaur-level cancer defences: Evolution of cancer suppression over macroevolutionary time Author summary Humans are not the only species suffering from cancer, yet cancer does not impact all life equally. Body size is relevant because maintaining a large number of cells in a tumour-free st...

New paper out! 🀩 "Shrinking to bird size with dinosaur-level cancer defences: Evolution of cancer suppression over macroevolutionary time" with @kokkonut.bsky.social and @marcanthonytollis.bsky.social. doi.org/10.1371/jour... A short thread:

16.09.2025 11:51 πŸ‘ 44 πŸ” 14 πŸ’¬ 1 πŸ“Œ 0

Check out our awesome review of squamates, covering fossils, phylogenetics, and genomics!

07.09.2025 05:06 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

bsky.app/profile/marc...

05.09.2025 02:54 πŸ‘ 6 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
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Recent Non-LTR Retrotransposon Activity Predicts Cancer Prevalence in Mammals Non-long terminal repeat retrotransposons (nLTRs), including long and short interspersed nuclear elements (L1 and SINEs), are the most abundant and active mobile elements in mammals. NLTRs play critic...

Have a read, hope you enjoy! www.biorxiv.org/content/10.1...

05.09.2025 02:52 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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a close up of a man 's face with a gmail.com email address ALT: a close up of a man 's face with a gmail.com email address

This suggests that LINE movement in the genome promotes tumor growth, but once SINEs, which depend on LINE enzymatic machinery, get moving, that’s what causes trouble (i.e. malignant cancers)

05.09.2025 02:52 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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a group of men in monkey costumes with the caption you and me baby aint nothin but mammals ALT: a group of men in monkey costumes with the caption you and me baby aint nothin but mammals

Interestingly, he found that across mammals LINE activity predicts neoplasia prevalence, but when you add SINEs to the mix, it predicts malignancy

05.09.2025 02:52 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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New lab preprint! Vahid Fard looked across mammals and found that species with more recently active LINE and SINE retrotransposons in their genomes also get more cancer, supporting a model where genome instability promotes neoplasia and malignancy

05.09.2025 02:52 πŸ‘ 4 πŸ” 1 πŸ’¬ 1 πŸ“Œ 1
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never forget what they stole from you

28.08.2025 02:54 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Yeah I’ll be skipping my usual conference not because it overlaps with the first week of classes (it always does) but rather the Knicks are coming to town that weekend

15.08.2025 21:39 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

#PopGen #PopulationGenomics #PopulationGenetics

12.08.2025 23:57 πŸ‘ 5 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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GitHub - marctollis/macrogenetics: Fetching and alignment of population-level sampling for DNA genetic markers from NCBI Fetching and alignment of population-level sampling for DNA genetic markers from NCBI - marctollis/macrogenetics

For a project, we needed a tool that will batch download phylogeographic DNA samples (like mtDNA and nucDNA) for lots of species, which have just been sitting on NCBI since the PCR and Sanger-sequencing era (ca. 2003-2015) and can still be hella useful, so I wrote one. It aligns the sequences, too πŸ‘

12.08.2025 23:46 πŸ‘ 8 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1

We are still doing the negotiated F&A.

Yeah my summer plan was to put in a grant by August but I’m changing course to focus on beefing up the preliminary work, and push it into the fall.

Provided there is an NSF DEB by then.

10.05.2025 22:27 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Has anybody been consulted on the NSF β€œshakeup”? Should PIs not bother submitting proposals at this point? I mean odds for funding were always low but are we just throwing effort into the wind now?

10.05.2025 15:33 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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The Evolution of Human Cancer Gene Duplications acrossΒ Mammals Abstract. Cancer is caused by genetic alterations that affect cellular fitness, and multicellular organisms have evolved mechanisms to suppress cancer such

Sophie came to NAU from Ireland to work on this project one fall, to follow up on on a study we published in 2020 (also in MBE). It couldn't have gone better, and the new paper is a welcome contribution to the cancer evolution literature. oup2-idp.sams-sigma.com/authorize?au...

22.03.2025 17:31 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Variable gene copy number in cancer-related pathways is associated with cancer prevalence across mammals Abstract. Cancer is a disease of multicellularity, observed across the tree of life. In principle, animals with larger body sizes and longer lifespans shou

Sophie Matthews’s lovely paper on gene copy number and cancer prevalence across mammals has been published in Molecular Biology and Evolution @official-smbe.bsky.social, check it out! academic.oup.com/mbe/advance-...

22.03.2025 17:30 πŸ‘ 4 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0

Morale is pretty low among scientists given the new regime. Funding scenarios are up in the air, many MDs and PhDs are unsure of their status. But don’t despair! Put the energy into your students. Teach like a MFer, light the fire, they will be ready when the smoke clears.

24.01.2025 02:31 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Haha Gen X has no complaints, just β€œwhatever”

16.01.2025 02:08 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Fellow parents: amirite, it’s one thing to step on a lego but it’s even more infuriating to step on a cheerio

16.01.2025 02:07 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Xmas mix Playlist Β· Marc Tollis Β· 187 items Β· 11 saves

Here mt Xmas playlist ive been building for more than 10 years. Enjoy! open.spotify.com/playlist/0Qn...

23.12.2024 02:27 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I don’t know why (well, money). Superman (1978) is a perfect movie and still holds up

20.12.2024 01:28 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

the only time I want someone to be over-bubbly and friendly in an email is when they have to respond to my dumb question. Please be nice!

18.12.2024 19:52 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

It doesn’t get easier. They stay difficult, except are huge, mobile, and extremely talkative (until they become teenagers and stop talking for a little while)

18.12.2024 15:24 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0