Библиотека
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #0-9 Показать все
Kelly S.R.A. (1996) The Austral palaeobiogeography of an Early Cretaceous (Albian) trigoniid bivalve assemblage from the upper part of the Fossil Bluff Group, Alexander Island, Antarctica // C.Spaeth (Ed.). New Developments in Cretaceous research topics. Proceedings of the 4th International Cretaceous Symposium, Hamburg, 1992. Hamburg, Universitat Hamburg. Mitteilungen aus dem Geologisch-Palaontologischen Institut der Universitat Hamburg, Hf.77, 129-139.
An Early Cretaceous (Late Albian) assemblage of trigoniid bivalves occurs in a single bed of the Mars Glacier Formation, in the upper part of the Fossil Bluff Group in eastern Alexander Island, Antarctica. It comprises: Eselaevitrigonia sp. nov., Nototrigonia (Nototrigonia) ponticula SKWARK0, Nototrigonia (Nototrigonia) spedeni FLEMING, Nototrigonia (Callitrigonia) sp. nov., Pacitrigonia sp. nov. and Pisotrigonia capricornia SKWARKO, all new records for Antarctica. The assemblage most resembles Australasian faunas, rather than South American ones, and provides an example of a distinct Austral palaeobiogeographic distribution. The surface flow of the southern margin of the Pacific Ocean was eastwards, bringing larval spat from Australasia towards the west coast of the Antarctic Peninsula. Larval spat from Alexander Island appear to have been denied access to the Austral Basin of South America. Possible reasons for this include palaeogeographic barriers and Pacific Ocean current circulation.