Authors / CoAuthors
Riding, J.B. | Helby, R.
Abstract
Selected species of the dinoflagellate cyst genus Wanaea from Australasia and Europe have been restudied. The new species Wanaea lacuna from the late Bathonian of Australia demonstrates that the genus may be extensively cavate and the generic diagnosis has been emended. Other new species from the Bathonian and earliest Callovian of Australia include Wanaea enoda and W. verrucosa. Wanaea enoda, W. lacuna and W. verrucosa are all energlynioid forms which lack a prominent posterior paracingular flange. The European and sub-Mediterranean energlynioid species Wanaea acollaris Dodekova 1975 and W. zoharensis Conway 1978 have been redescribed and emended. Wanaea zoharensis may have a solid extension to the antapical horn or protuberance and the term antapicular structure is proposed for this feature. In Australia, the form originally described as Epicephalopyxis spectabilis Deflandre & Cookson 1955 has been subsequently misidentified. The species has a complex paracingular flange comprising three distinct zones; it is also stratigraphically important, being confined to the mid Oxfordian. It was transferred to Wanaea in 1958, however the figured specimen accompanying this transfer is not conspecific with the type. This specimen has a narrower flange comprising short, regular processes which are connected distally by a trabeculum. Subsequent identifications of Wanaea spectabilis have followed the latter specimen. Because of this, the new species Wanaea talea is erected.
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nonGeographicDataset
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34902
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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- External PublicationArticle
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
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2000-01-01T00:00:00
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