Archerd Shell Collection > Shell Classes > Bivalvia > Cardiidae


Family: Cardiidae (Cockles)


Description
The family Cardiidae is one of the largest and best-known of bivalves. There are over 200 living cockle species and many more fossil forms.
 
Strong, compact, and heart-shaped, the cockle shell can be rolled over the sands and banged about without any damage to the live mollusc. Its siphons are short, and the foot is also well developed --indeed capable of moving the animal about in short leaps at the surface, where it normally lives. In many cockles, the siphons also bear light receptors.
 
Shell features are: completely symmetrical and equal sized valves; prominent umbones; strong radial ribs, which in some species carry spines; equal size muscle scars; no pallial sinus; and, two cardinal teeth in each valve. The internal margin of the lip may vary from lightly serrated to the definitely crenulated edge view, shown in the two species at right.
Classification
Class: Bivalvia
Subclass: Pteriomorphia
Order: Veneroida
Superfamily: Cardiacea
Family: Cardiidae
 
Major Genera
  • Genus: Acanthocardia
  • Genus: Americardia
  • Genus: Cardium
  • Genus: Cerastoderma
  • Genus: Clinocardium
  • Genus: Corculum
  • Genus: Ctenocardia
  • Genus: Dinocardium
  • Genus: Discors
  • Genus: Fragum
  • Genus: Fulvia
  • Genus: Laevicardium
  • Genus: Lophocardiium
  • Genus: Lyrocardium
  • Genus: Lunulicardia
  • Genus: Microcardium
  • Genus: Nemocardium
  • Genus: Papyridea
  • Genus: Parvicardium
  • Genus: Plagiocardium
  • Genus: Ringicardium
  • Genus: Trachycardium
  • Genus: Trigoniocardia
  • Genus: Serripes
Clinocardium nuttalli
Clinocardium nuttalli (Conrad, 1837)
Nuttall's Cockle

Trachycardium_rubicundum2.JPG (55083 bytes)
Dinocardium robustum
subspecies vanhyningi (Clench & Smith, 1944)
Vanhyning's Cockle

Corculum_cardissa3.jpg (105723 bytes)
Corculum cardissa (Linnaeus, 1758)
form monstrossa
True Heart Cockle

 

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Cardiidae
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Archerd Shell Collection > Shell Classes > Bivalves > Cockles