Scenella
Genus of molluscs (fossil) / From Wikipedia, the free encyclopedia
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Scenella is an extinct genus of fossil invertebrate animal which is generally considered to be a mollusc; at various times it has been suggested that this genus belongs with the gastropods, the monoplacophorans, or the helcionellids, although no firm association with any of these classes has been established.[4] An affinity with the hydrozoa (as a flotation device) has been considered,[1] although some authors oppose this hypothesis.[5] A gastropod affinity is defended on the basis of six pairs of internal muscle scars,[6] whilst the serially-repeated nature of these scars suggests to other authors a monoplacophoran affinity.[1] However the specimens showing this scarring have not been convincingly shown to belong to the genus Scenella.[1] A similarity to the Ediacaran Ovatoscutum has also been drawn.[7]
Scenella | |
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Dorsal view of the shell of Scenella tenuistriata | |
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lateral view of the shell of Scenella tenuistriata | |
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Family: | † Scenellidae S. A. Miller, 1889[2] |
Genus: | Scenella Billings, 1872 |
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