LATE EOCENE GADIFORM (TELEOSTEI) SKULL FROM SEYMOUR-ISLAND, ANTARCTIC PENINSULA

被引：25

作者：

EASTMAN, JT

GRANDE, L

机构：

[1] Department of Zoological and Biomedical Sciences, Ohio University, Athens

[2] Department of Geology, Field Museum of Natural History, Chicago, illinois

来源：

ANTARCTIC SCIENCE | 1991年 / 3卷 / 01期

关键词：

LA MESETA FORMATION; CRANIAL OSTEOLOGY; GADIFORM EVOLUTION; FOSSIL FISH;

D O I：

10.1017/S0954102091000123

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

On the basis of a skull from the late Eocene La Meseta Formation on Seymour Island, Antarctic Peninsula, a gadiform fish is reported from the Antarctic region for the first time. This specimen, the most completely preserved fossil teleost cranium yet described from Antarctica, provides convincing evidence for the presence of Gadiformes in a far southerly location under temperature climatic conditions 40 m.y. ago. The exoccipital condyles, supraoccipital and lambdoidal crests, and post-temporal and supratemporal fossae are well preserved, as are the roofing bones on the posterior half of the skull. Comparative osteological study indicates that these features are very similar in appearance to those of merlucciids (hakes) and gadids (cods).

引用

页码：87 / 95

页数：9

共 40 条

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