Xiphosura
9.9
A group of animals that includes horseshoe crabs and extinct relatives
- noun
- /ˌzɪfəˈsʊərə/
- Specialized
:
Xiphosura
- The modern horseshoe crab is a surviving member of the ancient order Xiphosura.
Examples
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The Xiphosura have changed little in form over millions of years.
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The Xiphosura are often referred to as horseshoe crabs.
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Scientists have discovered new fossil species belonging to the Xiphosura.
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Did you know that Xiphosura have existed for over 450 million years?
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The modern horseshoe crab is a surviving member of the ancient order Xiphosura.
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Scientists have discovered new fossil species belonging to the Xiphosura.
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Did you know that Xiphosura have existed for over 450 million years?
Surface Forms
Etymology
Xiphosura comes from the Greek parts xiphos and oura, which mean 'sword' and 'tail'. A helpful image is the long, sword-like tail of the horseshoe crab, so Xiphosura names the group of animals (including horseshoe crabs) known for that tail.
