期刊
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
卷 185, 期 2, 页码 511-542出版社
OXFORD UNIV PRESS
DOI: 10.1093/zoolinnean/zly053
关键词
Chubut province; dolphin; Gaiman Formation; Odontoceti; Platanistoidea; Squalodontidae; stratigraphy
类别
资金
- Willi Hennig Society
- Cetacean Society International (CSI)
- Learner-Gray Grant from the American Museum of Natural History (AMNH)
- Sociedad Argentina para el Estudio de Mamiferos (SAREM)
- Smithsonian Institution (Remington Kellogg Fund)
- Agencia Nacional de Promocion Cientifica y Tecnologica [PICT 0792]
- Australian Research Council Linkage Project [LP150100403]
- Australian Research Council [LP150100403] Funding Source: Australian Research Council
The early Miocene of Patagonia (Argentina) provides one of the best-known records of odontocetes for an age interval with scarce fossils. Most of these taxa are historically old and briefly described, which has contributed, in part, to their controversial taxonomic position. The shark-toothed dolphin Phoberodon arctirostris was described almost 100 years ago and suggested as a member of Platanistoidea and Squalodontidae. However, it has not been analysed recently and has never been included in a phylogenetic analysis. Recent fieldwork in the early Miocene sediments in Patagonia yielded a new specimen referred to this species, allowing for its modern and detailed description and the first phylogenetic analyses. Analyses recovered P. arctirostris as a stem Odontoceti or an early-diverging platanistoid, more closely related to an unnamed Oligocene specimen from New Zealand and not in a clade with Squalodon calvertensis (i.e. Squalodontidae). The reconstructed body length of P. arctirostris indicates that it is one of the largest stem Odontoceti. Our results suggest that during the early Miocene of Patagonia, archaic odontocete forms (i.e. P. arctirostris) cohabited with archaic and more crownward platanistoids (i.e. Aondelphis talen and Notocetus vanbenedeni), helping to characterize the early Miocene cetacean communities of Patagonia.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据