Cassianellidae Temporal range: Landinian - Norian
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Pteriida |
Superfamily: | Pterioidea |
Genus: | †Cassianellidae Ichikawa, 1958 |
Genera | |
See text |
Cassianellidae is a small extinct family of prehistoric bivalves which lived from the Middle Triassic, Ladinian stage through the Late Triassic Norian stage.[1] It has been suggested that the family may have evolved from the related family Bakevelliidae.[2] Bakevelliidae species are found in North America, South America, Europe, the Middle East, and Asia. Living a stationary life attached to substrate in marine and brackish environments, they formed shells of an aragonite composition with a low amount of magnesium calcite. The family Cassianellidae was named by K. Ichikawa in 1958.[1]