@j0nas-hakk3ns.bsky.social
Earth, Life, & Climate @ Utrecht University
There's actually some doubt about how strong the tail-first births correlate with aquatic habits. Paper by @feikosaur.bsky.social focussing on ichthyosaurs, but with broader implications. link.springer.com/article/10.1...
Heads or tails first? Evolution of fetal orientation in ichthyosaurs, with a scrutiny of the prevailing hypothesis - BMC Ecology and Evolution
According to a longstanding paradigm, aquatic amniotes, including the Mesozoic marine reptile group Ichthyopterygia, give birth tail-first because head-first birth leads to increased asphyxiation risk...
link.springer.com
May 11, 2025 at 8:50 PM
There's actually some doubt about how strong the tail-first births correlate with aquatic habits. Paper by @feikosaur.bsky.social focussing on ichthyosaurs, but with broader implications. link.springer.com/article/10.1...