Prof. Christine Böhmerさんのイラストまとめ

Immense size of sauropodomorph dinosaurs necessitated soft tissue pads to reduce the stress within pedal bones.

Jannel et al 2022 @ScienceAdvances Softening the steps to gigantism in sauropod #dinosaurs through the #evolution of a pedal pad
https://t.co/XGYm8iZm9g

Arthritis in the jaw of a pliosaur? Evidence of degenerative condition in fossil remains of marine reptile from the Jurassic.

Sassoon et al 2012 Palaeontology: Cranial anatomy, taxonomic implications and #palaeopathology of an Upper Jurassic pliosaur
https://t.co/7lP3zsiNBS

[8/11] Our main hypotheses: Diverging shape of first thoracic vertebra (‘cervicalization’ of T1) and allows increased mobility at neck-trunk transition in #giraffe. Similarity/convergence of last cervical #vertebra (C7) shape in long-necked taxa.

In contrast to terrestrial locomotion that shows substantial variation in gait, different #dog breeds use consistent stereotypic swimming gait. 🐶

Fish et al 2020 @AnatRecord The “dog paddle”: Stereotypic swimming gait pattern in different dog breeds
https://t.co/VjRrrMUr63 https://t.co/KQVHDgUvrP

Ending year 2020 with a study on teeth:
#Narwhals only have one visble #tooth = #tusk. Is it an incisor or a canine? Recent results support canine identity.

Nweeia et al 2012 @AnatRecord Vestigial Tooth Anatomy and Tusk Nomenclature for Monodon Monoceros

https://t.co/Jvu9lS4kwh

Unique feeding behaviour: snail-eating snakes extract soft body of the prey using their mandibles 🐌🐍

Kojima et al 2020 @SciReports Mandibular sawing in a snail-eating #snake
https://t.co/IyEvPLytB2

📹👇Video (from the supplementary material)
https://t.co/BTxPzScng9

Evolutionary bias: Becoming smaller can happen about 10x faster than becoming bigger.

Evans et al 2012 PNAS: The maximum rate of #mammal #evolution
https://t.co/aDsugFNdNB

Commentary by
Polly 2012 PNAS: Measuring the evolution of body size in mammals
https://t.co/vDBPFid7fD

#FossilFriday
Absence of very large penguins today is likely due to the Oligo-Miocene radiation of marine mammals.

Mayr et al. 2017 @NatureComms
A Paleocene #penguin from New Zealand substantiates multiple origins of #gigantism in fossil Sphenisciformes

https://t.co/lsypVXeUde