Andrej Spiridonov
@andrejpaleo.bsky.social
Professor of paleontology and Earth systems at Vilnius University. My interests are: theoretical paleontology, evolution, geology, stratigraphy, philosophy of biology and geology, climate at scales great and small.
https://twitter.com/AndrejSpiridon4
https://twitter.com/AndrejSpiridon4
Teeth are homologous to scales (odontodes). So, maybe there were couple of more transitions of odontodes from functional scales to functional teeth? Just saying.
January 17, 2026 at 1:22 PM
Teeth are homologous to scales (odontodes). So, maybe there were couple of more transitions of odontodes from functional scales to functional teeth? Just saying.
Scaling through time and space in your mind is a wonderful intellectual activity, which brings the context to everything.
January 8, 2026 at 10:48 PM
Scaling through time and space in your mind is a wonderful intellectual activity, which brings the context to everything.
Reposted by Andrej Spiridonov
Generally, high extinction rate is followed by high origination rate, but I have also found in some Mesozoic intervals, high origination is followed by high extinction rates in gastropods. It may also point to ecological specialization. In a paper, we have also suggested that...
January 6, 2026 at 11:17 AM
Generally, high extinction rate is followed by high origination rate, but I have also found in some Mesozoic intervals, high origination is followed by high extinction rates in gastropods. It may also point to ecological specialization. In a paper, we have also suggested that...