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Journal Article
Published: 19 July 2005
Canadian Journal of Earth Sciences (2005) 42 (5): 777–790.
... , and Canoptum , while other genera are grouped together as saturnalids, other Spumellaria, hat-shaped Nassellaria, and other Nassellaria (see Fig.  4 ). Other Spumellaria are mainly Ferresium, Risella , Spumellarian indet. D ( Carter 1993 ), and, in decreasing order of abundance, Plafkerium, Icrioma, Loupanus...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2010
DOI: 10.1144/SP334.8
EISBN: 9781862395824
... complex forms, for example, Eptingium , Icrioma , Nabolella , Paratriassoastrum , Pentactinocarpus , Praecitriduma , Tetraporobrachia , and short-ranging genera confined to the Rhaetian such as Serilla , Kungalaria and Globolaxtorum . It is note worthy that nearly all forms with highly twisted...
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