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1bivalvo masculinemolusco bivalvo masculine
- Shell fragments of bivalves and gastropods are common in Neogene shallow-water deposits.
- Some sponges bore into the shells of bivalves, gastropods, and the colonial skeletons of corals by slowly etching away chips of calcareous material.
- Based on gastropods, bivalves, and planktonic foraminifera, Kilmer assigned this formation to the Turonian.
- Most shells were bivalves, especially clams and some mussels.
- Many bivalves and brachiopods possess multilayered shells.
- Many modern gastropods and bivalves respond to increased temperature by increasing both shell and soft tissue growth rates.
- As in most bivalves, the shell is composed of three layers: the periostracum, the prismatic layer, and the nacre.
- It was thought that this behavior was an adaptation for desiccation resistance analogous to the closed shells of bivalves.
- Finally, there was disagreement over how many major subdivisions were recognized within the bivalves.
- Mussels, like other bivalves, obtain all their nutrients - including iron - by filtering them from the water.
- There is no evidence for trans-Panthalassan dispersal of bivalves in low latitudes within the interval of Ladinian coral beds.
- Freshwater bivalves, snails, and branchiopod Crustacea were common.
- Many bivalves (such as clams or oysters) are used as food in places all over the world.
- Both species of crayfish readily ate native bivalves.
- However, early calapids in the Cretaceous were smaller in size and are not considered as major predators of bivalves and gastropods.
- This pattern was documented for both bivalves and gastropods and continued from the mid to late Paleocene until the early Eocene.
- Notable is the relative rarity of bivalves and gastropods, consistent with a deeper water environment.
- Despite their unusual features, it is generally believed that the closest relatives of scaphopods are the bivalves.
- Marine invertebrates include ammonites, echinoderms, bivalves and crustaceans, but infaunal elements are rare.
- A bivalve closes its shells by contracting its powerful adductor muscles.