Holectypoida
Sign in to saveThe Holectypoida are an order of sea urchins related to the sand dollars. The order consists of just two living genera, but was once more diverse.
Wikidata facts
- Parent taxon
- Irregularia
- Image
- Echinoneus cyclostomus.jpg
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- taxon name
- Holectypoida
- taxon rank
- order
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Encyclopedic overview
3 sectionsContents
- Description and characteristics
- Taxonomy
- References
The Holectypoida are an order of sea urchins related to the sand dollars. The order consists of just two living genera, but was once more diverse.
==Description and characteristics== In appearance, the living holectypoids are similar to sand dollars, but with less flattened bodies and an oval outline. They also lack the petal-like patterns found on the bodies of sand dollars.
Excerpted from Wikipedia’s “Holectypoida” article, available under the CC BY-SA 4.0 licence.