Questions tagged [molluscs]

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(Aquatic gastropod) Physae identification

I need help to identify a physa. What are the identification keys to make the difference between: physa fontinalis, physa marmorata , physa acuta (syn. Physella acuta) The difference ...
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Why might the chirality of gastopods be dominantly dextral?

This wikipedia page on gastropods provides a definition of chirality, and briefly describes the genetic mechanisms behind why a shell is wound left (sinistral) or right (dextral) handed. It also ...
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What is this sea shell?

Found in Belgrade, possibly carried back from the Mediterranean or Aegean coast.
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What percentage of genome do slugs and scallops have in common?

We can know genetic distance of thousands of species. The OTT tree of life gives genetic distance for nearly all species. Is there a resource to compare the genomes of any sequenced animals to know ...
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Why are certain types of clams prevalent in certain areas?

I live near a large tidal estuary and according to one person the only kind of clams to be found there are razor clams. Why would there only be one kind of clam? I mean mud is mud right? What makes it ...