Fred Ruhe
Well-known member
Keiichi Aotsuka & Hideki Endo, 2022
A Fossil Humerus of Pliocene Alcidae (Aves: Charadriiformes) from the Fukagawa Group in Hokkaido, Japan
Ornithological Science. 21 (1).
doi:10.2326/osj.21.79. S2CID 246475596
Abstract: A Fossil Humerus of Pliocene Alcidae (Aves: Charadriiformes) from the Fukagawa Group in Hokkaido, Japan
Alcidae (auks) is a family of wing-propelled diving Charadriiformes, which includes 24 extant species distributed in the Holarctic region. Here, we describe a fossil humerus of Pliocene Alcidae (approximately 4.5–3.5 Ma) from the Fukagawa Group in Hokkaido, Japan. Although this specimen is incomplete and the diagnostic characters of the specific genus are lacking, it shares similar characteristics with Uria, such as the size, dorsoventrally compressed humeral shaft, low and smooth crista deltopectoralis, and a nearly rectangular supracoracoideus scar. While several Alcidae fossils have been reported from the Miocene–Pleistocene deposits (23.0–0.0117 Ma) of the Eastern Pacific (i.e., Mexico and California, USA), little is known about fossils from the Western Pacific (i.e., Asia), most of which have been found from Pleistocene deposits (approximately 0.7–0.12 Ma). This study, reporting the first Pliocene Alcidae from the Western Pacific, implies that the Alcidae were already distributed in the Holarctic region during the early Pliocene.
Enjoy,
Fred
P. S. I didn't notice that Melanie already mentioned this paper in February:
www.birdforum.net
Fred
A Fossil Humerus of Pliocene Alcidae (Aves: Charadriiformes) from the Fukagawa Group in Hokkaido, Japan
Ornithological Science. 21 (1).
doi:10.2326/osj.21.79. S2CID 246475596
Abstract: A Fossil Humerus of Pliocene Alcidae (Aves: Charadriiformes) from the Fukagawa Group in Hokkaido, Japan
Alcidae (auks) is a family of wing-propelled diving Charadriiformes, which includes 24 extant species distributed in the Holarctic region. Here, we describe a fossil humerus of Pliocene Alcidae (approximately 4.5–3.5 Ma) from the Fukagawa Group in Hokkaido, Japan. Although this specimen is incomplete and the diagnostic characters of the specific genus are lacking, it shares similar characteristics with Uria, such as the size, dorsoventrally compressed humeral shaft, low and smooth crista deltopectoralis, and a nearly rectangular supracoracoideus scar. While several Alcidae fossils have been reported from the Miocene–Pleistocene deposits (23.0–0.0117 Ma) of the Eastern Pacific (i.e., Mexico and California, USA), little is known about fossils from the Western Pacific (i.e., Asia), most of which have been found from Pleistocene deposits (approximately 0.7–0.12 Ma). This study, reporting the first Pliocene Alcidae from the Western Pacific, implies that the Alcidae were already distributed in the Holarctic region during the early Pliocene.
Enjoy,
Fred
P. S. I didn't notice that Melanie already mentioned this paper in February:
A Fossil Humerus of Pliocene Alcidae from Hokkaido, Japan
A Fossil Humerus of Pliocene Alcidae (Aves: Charadriiformes) from the Fukagawa Group in Hokkaido, Japan by Keiichi Aotsuka and Hideki Endo Ornithological Science, 21(1):79-92 (2022). https://doi.org/10.2326/osj.21.79 Abstract Alcidae (auks)...
www.birdforum.net
Fred
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