Order Ostreoida | Rank Species | |
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Similar Hyotissa, Pycnodonte, Gryphaeidae, Belemnella, Rastellum | ||
Hyotissa semiplana is an extinct species of large saltwater oysters, a fossil marine bivalve mollusk in the family Gryphaeidae, the foam oysters
Contents
Description
Fossil shells of Hyotissa semiplana can reach a diameter of about 60 millimetres (2.4 in). They have thick-walled valves, with rough, nodose surface.
Distribution
Fossils of this species have been found in the Campanian-Maestrichtian of Poland, in the Santonian-Maestrichtian of Europe and North Africa and in the Campanian of South India.
References
Hyotissa semiplana Wikipedia(Text) CC BY-SA