Holectypoida
De Holectypoida zijn een orde van uitgestorven zee-egels (Echinoidea) uit de infraklasse Irregularia.
| Holectypoida | ||||||||
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| Taxonomische indeling | ||||||||
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| Orde | ||||||||
| Holectypoida Duncan, 1889 | ||||||||
Holectypoida op  | ||||||||
| (en) World Register of Marine Species[1] | ||||||||
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Families
- Anorthopygidae Wagner & Durham, 1966 †
- Coenholectypidae Smith & Wright, 1999 †
- Discoididae Lambert, 1900 †
- Holectypidae Lambert, 1900 †
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