Michael Landis

@landismj.bsky.social

2745 Followers 675 Following

Evolution, phylogenetics, biogeography, epidemiology, computational biology, statistical models, machine learning, scientific software — 🌵🕰️🌎🎲🖥️📈 — https://landislab.org

List of Evolution 2026 presentations by Landis lab members: Anna Nagel, Sunday @ 2:45pm, Room 22 Albert Soewongsono, Tuesday @ 10:30am, Room 23 Raymond Castillo, Tuesday @ 4:45pm, Room 25B Albert Soewongsono, Tuesday @ 6:00pm, Grand Ballroom BC Sean McHugh, Wednesday @ 9:30am, Room 21
Figure shows (a) cartoon for how ancestral/descendant ranges [ellipses] may be inherited during cladogenesis; (b) how ellipses are generated from projects of circles through tilted plane; (c) circular coordinate system for cladogenesis; (d) budding-range cladogenesis pattern; and (e) splitting-range cladogenesis pattern.
Image with four panels showing (a) scenario of phylogenetic tree and species ranges generated from speciation, extinction, and dispersal events in regions A and B; (b) how species counts increase/decrease in regions A and B over time; and how changing numbers of species in A and B cause changes in local (c) speciation rates, (d) extinction rates, and (e) dispersal rates.
Figure of historical timeline for ideas in the manuscript. Caption reads: "An evolving view of phylogenetic biogeography. Each period (arrow) corresponds to one of the four periods discussed in the main text. The ordering of themes within each period does not precisely correspond to when key ideas were introduced or popularized."
All Systematic Zoology/Biology research articles published over past 75 years, clustered by topic and represented in 2d space.
SIR of susceptible, infectious, and recovered compartments with individuals who take short "trips" to other locations away from home, plus diagram of four phylogenetic patterns of host-mediated infection (resident-to-resident, visitor-to-resident, resident-to-visitor, visitor-to-visitor).
Cartoon of paleogeographic, biogeographic, and phylogenetic history of an island plant radiation, and plots of hypothesized relationships between regional features and biogeographic rates.
Logo for Society of Systematic Biologists Mentorship Program. Two parallel phylogenies, nothing fancy.
In the following years a debate flared up as a reaction to a widely circulated, but never published manuscript by Gareth Nelson. In this paper, he stated that cladograms are not phylogenetic trees but tree diagrams representing patterns of unique characters (Eldredge and Cracraft 1980; Wiley 1981).
Screen shot of starter pack image
Mural from Missouri History Museum
three fish in a tree
Transcript says: Then back to Savage love, Junior says in response to last week's intro about the mice who get blasted with both testosterone and cortisone and then stress themselves out to death, Dan wished there was an easy way to know how evolutionarily diverged. He is from that ridiculous australian mouse, which is actually a marsupial. Good news there is. This website offers a research backed evolutionary divergence time for any pair of taxa. Timetree.org dot for example, humans and antichonus last had a common ancestor about 160 million years ago, around when placental and marsupial mammals diverged. We can also check divergence times to other sexy species like sequentially hermaphroditic clownfish Pulmocentridae, 429 million years ago, or pregnant male seahorses, also 429 million years ago. Or praying mantises that practice nuptial cannibalism much more frequently in captivity than in the wild 686 million years ago. Or the fungus with more than 17,000 sexes. Trichaptum 1270 5 million years ago, or poplars, which keep changing their sex chromosomes 1000, 530 million years ago. Ain't science fun?
Screen capture of ancestral biome affinity reconstruction for subclade in Viburnum. Pie charts colors indicate enabled affinities for biomes, black centers indicate established affinities for biomes.
Wikipedia screenshot: "Molecular sequence data indicate T. brasiliensis's closest relatives are the sister species Sauromys petrophilus of South Africa and Tadarida aegyptiaca of Africa and South Asia. These three species form a clade believed to be about 18 million years old."
figure showing steps for phyddle pipeline
Painting of dispersal-by-ghost https://news.artnet.com/art-world/art-bites-leonora-carrington-surrealist-survival-kit-2456838
Majestic turtle skull
Sledders on the hill in front of St Louis Art Museum
Lysimachia venosum (photo by Ken Wood)
From Nau (2001): "De Finetti used the notation ‘Pr’ to refer interchangeably to Probability, Price, and Prevision (‘foresight’), and he treated them as alternative labels for a single concept."
Figure shows two plots. Plot A shows how evolutionary tempo converges to same stationary distribution regardless of starting tempo. Plot B shows how tempo converges to different stationary distributions depending on diversification rate.
Diagram shows one worm makes two worms, making worms unstoppable
I think
Productivity vs. career stage plots
dreaming platypus
image of Metazooa website