[dinosaur] Fossilized skin of giant penguin from Eocene of Antarctica

Subject: [dinosaur] Fossilized skin of giant penguin from Eocene of Antarctica

From: Ben Creisler <bcreisler@gmail.com>

Date: Thu, 16 Jan 2020 19:24:36 -0800

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Ben Creisler

bcreisler@gmail.com

A new paper not yet mentioned:

Carolina Acosta Hospitaleche, ÂMartÃn De Los Reyes, ÂSergio Santillana & Marcelo Reguero (2020)
First fossilized skin of a giant penguin from the Eocene of Antarctica.
Lethaia (advance online publication)
doi: https://doi.org/10.1111/let.12366
https://onlinelibrary.wiley.com/doi/10.1111/let.12366

An articulated wing belonging to Palaeeudyptes gunnari containing mineralized skin was found in Lutetian (middle Eocene) sediments from Seymour Island, Antarctica. It shows the connective tissues, morphology and density of the feather follicles, and a groove pattern left by the feather calami resting on the skin. Analysis of the preserved surfaces indicates a composition of calcium phosphate. This is the most complete and only articulated wing described for this species and represents the first record of a neornithine bird preserving threeâdimensional integument. Plumage density of the wing MLP 14âIâ10â22, estimated by counting the follicles under a stereoscopic microscope, is lower than that of the modern Emperor penguin.

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