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Jansaella

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Journal Article
Published: 01 August 1975
Canadian Journal of Earth Sciences (1975) 12 (8): 1480–1484.
Journal Article
Published: 01 July 2010
Journal of Paleontology (2010) 84 (4): 569–587.
... of taxa such as Jansaella Mamet and Roux, 1975 , Uraloporella Korde, 1950 and, to a lesser extent, Nanopora Wood, 1964 . These fossils are straight to curved or sinuous calcareous tubes, 1mm in diameter, that occur in the Devonian-Carboniferous. Diameter is relatively constant in individuals...
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