Summary description from Wikipedia:

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Parent Taxon

• N/A

Sibling Taxa

• Cardiinae
• Clinocardiinae
• Discors
• Fraginae
• Frigidocardium
• Goethemia
• Keenaea
• Laevicardiinae
• Lophocardium
• Lymnocardiinae
• Maoricardium
• Microcardium
• Nemocardium
• Orthocardiinae
• Plagiocardium
• Pratulum
• Stylodacna
• Trachycardiinae
• Tridacninae

Child Taxa

• Acrosterigma
• Dallocardia
• Papyridea
• Trachycardium
• Vasticardium

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