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New Pleistocene bird fossils in Taiwan reveal unexpected seabirds in East Asia.
- Source :
- Acta Palaeontologica Polonica; 2023, Vol. 68 Issue 4, p1-12, 12p
- Publication Year :
- 2023
-
Abstract
- The island of Taiwan, with its diverse microclimates and key position on the East Asian-Australasian Flyway, attracts numerous bird enthusiasts due to its diverse avian fauna. Nevertheless, due to the scarcity of fossil records, there is a significant knowledge gap between modern and ancient avifaunas in Taiwan. Currently, there is only a single described Pleistocene fossil; it is attributed to Phasianidae. To address this gap, this study describes two new bird fossils, a left humerus and a left tibiotarsus, and discusses them in detail herein. The fossils were collected from the Liuchungchi Formation (Early Pleistocene, 1.95-1.35 Ma) in Niubu, Chiayi, southwestern Taiwan, which represents a neritic environment. The fossils are identified as from species of Gaviidae (loons), with the humerus belonging to an undetermined species of Gavia and the tibiotarsus to Gavia stellata. Loons are seabirds that are primarily distributed in high- and middle latitudes of the Northern Hemisphere. In addition, these birds are extremely rare in modern Taiwan: records are scarce and most are limited to northern and northeastern Taiwan since the 1860s, indicating that the modern Gavia birds only occasionally visit Taiwan. All known Pleistocene fossils of species of Gavia from the northern West Pacific come from Japan. The Taiwan fossils of Gavia provide valuable bird evolutionary and paleobiogeographic information for the subtropical West Pacific and may imply the presence of a distinct avifauna in the region during the Early Pleistocene. [ABSTRACT FROM AUTHOR]
- Subjects :
- FOSSIL birds
PLEISTOCENE Epoch
FOSSILS
PHASIANIDAE
SEA birds
HUMERUS
Subjects
Details
- Language :
- English
- ISSN :
- 05677920
- Volume :
- 68
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Acta Palaeontologica Polonica
- Publication Type :
- Academic Journal
- Accession number :
- 174552951
- Full Text :
- https://doi.org/10.4202/app.01091.2023