Leaiid Conchostracan Zone in Antarctica and Its Gondwana Equivalents

• Published in: Science
• Main Authors: Doumani, George A., Tasch, Paul
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Association for the Advancement of Science (AAAS) 1963
• Subjects: Glossopteris; Ohio Range; Antarc*; Antarctica
• Online Access: http://dx.doi.org/10.1126/science.142.3592.591; https://www.science.org/doi/pdf/10.1126/science.142.3592.591

Two species of conchostracans (class Crustacea) occur in the coal measures of the Ohio Range, associated with a typical Glossopteris flora. New Leaia and Cyzicus ( Lioestheria ) species occur in a restricted zone near the top of the stratigraphic section. The biofacies represents a swampy environment and deposition in short-lived ponds of still water under variable weather cycles. The zone compares closely with the leaiid zones in South Africa, South America, and Australia, and is assigned to the Middle-Upper Permian, specifically, Lower Beaufort age.