One of the mysteries of the English language finally explained.
Having one valve or shell.
- ‘In the earliest Cambrian, one lineage developed a bivalved mineralized shell (Fordilla and its relatives), the other an endogastric univalve shell (the Helcionellids).’
- ‘Vetustovermis bears a number of morphological features that are found in Kimberella, which has been interpreted to have a non-mineralized but stiff univalve shell.’
- another term for gastropod
- ‘Thus, all rostroconches and some helcionellacean univalves technically become stem group bivalves.’
- ‘But who speaks out for the univalve and the bivalve?’
- ‘This univalve bonds tightly to the shell and rarely moves; over time, the crab ends up with a stack of many generations of slipper shells.’
- ‘Now explain how a univalve differs from a bivalve, in more ways than just the number of shells.’
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