Fig. 4 Thin sections and tissue maps of a passerine mannikin bird (a), semiaquatic birds (b, c), non-avian reptiles (d–f), and mammals (g–i). Scale bars are as follows: a (100 μm), b (166 μm), c (100 μm), d (150 μm), e (100 μm), f (50 μm), g (50 μm), h (100 μm), and i (150 μm). Images used from Wikimedia Commons and from the San Diego Zoo Wildlife Alliance.

IOB
"Furthermore, the loss of invading #respiratory diverticula and pneumatic #osteological characters in the postcranial #skeleton of pursuit diving #birds serves as a reminder that adaptation to specific #ecologies..."
Byrne et al
doi.org/10.1093/iob/...

Fig. 3 Thin sections and tissue maps of volant birds (a–i). Scale bars are as follows: a (50 μm), b (50 μm), c (100 μm), d (250 μm), e (50 μm), f (100 μm), g (200 μm), h (100 μm), and i (100 μm). Images used from Wikimedia Commons and from the San Diego Zoo Wildlife Alliance.

IOB
"This suggests that #ventilatory air sacs and associated diverticula can be present despite the absence of #osteological and #histologic correlates..."
Byrne et al
doi.org/10.1093/iob/...

#archosaurs #birds #avian #science #biology

Ontogenetic changes and sexual dimorphism in the cranium and mandible of the Atlantic walrus (Odobenus rosmarus rosmarus L.) Walruses have been an important subsistence and cultural resource for humans and have been exploited for millennia across their distribution. This exploitation has contributed to severe declines in s...

New publication suggest a classification technique that will facilitate future #osteological studies on #walruses.
With Oliver Kersten @okerstenscience.bsky.social & Bastiaan Star from @biovitenskap.bsky.social
Published in The Anatomical Record @anatrecord.bsky.social by Wiley

On the other hand, the list of #osteological studies I presented here is not exhaustive but does cover a good deal, at least in terms of (active) researchers. Hopefully this thread has sparked your interest in #Estonian #archaeology - I hope to bring you more of these threads in the future!