Overview

Brief Summary

Fossil species

recent & fossil

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Evolution and Systematics

Evolution

Classification

Alternative views on the classification of Cypraeidae range from uniting most of the species in the genus Cypraea (e.g. Ranson, 1967) to splitting in several subfamilies and dozens of genera (e.g. Schilder & Schilder, 1938 and subsequent papers) for less than 250 extant species). There is no doubt that the family has an old evolutionary history, dating back to the Jurassic, so that existing species are likely to show enough divergence so as to support some taxonomic splitting. The classification of Lorenz (2002) largely coincides with that of Meyer (2003) based on molecular data, so that it was the basis for the classification in subfamilies in Bouchet & Rocroi (2005). Subfamilies are here listed as alternate representation and the genera are direct child taxa of the family Cypraeidae.
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Source: World Register of Marine Species

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:775Public Records:690
Specimens with Sequences:706Public Species:242
Specimens with Barcodes:693Public BINs:246
Species:261         
Species With Barcodes:243         
          
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Barcode data

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Cypraeidae

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Wikipedia

Cypraeidae

Cypraeidae, common name the cowries (singular: cowry), is a taxonomic family of small to large sea snails. These are marine gastropod mollusks in the superfamily Cypraeoidea, the cowries and cowry allies.

Contents

Shell description

Cypraeidae have adult shells which are very rounded, almost like an egg; they do not look like a typical gastropod shell. In virtually all of the species in the family Cypraeidae, the shells are extremely smooth and shiny. This is because in the living animal, the shell is nearly always fully covered with the mantle.

Typically, no spire is visible in the fully adult shell, and there is a long, narrow, aperture which is lined with "teeth."

Juvenile cowry shells are not at all similar to adult cowry shells. The juvenile shells of cowries perhaps more closely resemble the shells of some "bubble snails" in the order Cephalaspidea. Also the shells of juvenile cowries seldom exhibit the same color patterns as the adult shells do, and thus can be hard to identify to species.

Cowries have no operculum.

Predators

The very narrow toothed aperture of the cowry shell makes the adult shells difficult for many predators to reach into. However cowries are still vulnerable to predation:

  • Some tropical crustaceans can break the dorsum of a cowry shell.
  • Some mollusc-eating cones like Conus textile can inject venom into the cowry's flesh. The cone then extends its stomach into the shell, through the slit, to completely ingest the flesh.
  • Some octopuses can gouge a small hole (using a special barb/tooth and an acidic secretion) through the shell to inject a venom that kills the animal within.

Taxonomy

For nearly 200 years, every species in the family Cypraeidae was placed in one genus, Cypraea, but in 2002 [1] the cowries were divided into many different genera.

2005 taxonomy

The family Cypraeidae belongs, together with the family Ovulidae, to the superfamily Cypraeoidea. This, in turn, is part of the clade Littorinimorpha which belongs within the clade Hypsogastropoda according to the taxonomy of Bouchet & Rocroi (2005).

The following six subfamilies have been recognized in the taxonomy of Bouchet & Rocroi (2005) but are treated as alternate representation of Cypraeidae in the World Register of Marine Species :

  • Cypraeinae Rafinesque, 1815
    • tribe Cypraeini Rafinesque, 1815 - synonym: Porcellanidae Roberts, 1870 (inv.)
    • tribe Mauritiini Steadman & Cotton, 1946
  • Erosariinae Schilder, 1924 - synonyms: Cypraeacitinae Schilder, 1930 (inv.); Nariinae Schilder, 1932; Staphylaeinae iredale, 1935
  • Erroneinae Schilder, 1927
    • tribe Erroneini Schilder, 1927 - synonym: Adustinae Steadman & Cotton, 1946
    • tribe Bistolidini C. Meyer, 2003
  • Gisortiinae Schilder, 1927 - synonyms: Archicypraeinae Schilder, 1930; Bernayinae Schilder, 1927; Cpraeorbini Schilder, 1927; Mandolininae Schilder, 1932; Umbiliini Schilder 1932; Zoilinae Iredale, 1935
  • Luriinae Schilder, 1932
    • tribe Luriini Schilder, 1932 - synonym: Talpariinae Iredale, 1935
    • tribe Austrocypraeini Iredale, 1935
  • Pustulariinae Gill, 1871
    • tribe Pustulariini Gill, 1871
    • tribe Cypraeovulini Schilder, 1927
    • tribe Zonariini Schilder, 1932

Genera

Genera within the family Cypraeidae include:

Apertural view of a shell of Nucleolaria granulata
  • Subfamily Pustulariinae Gill, 1871
    • Tribe Pustulariini Gill, 1871
Notocypraea piperita

Species

For a list of Species in the taxonomic family Cypraeidae, see Cowries.

References

  1. ^ Lorenz F. 2002. New Worldwide Cowries. Descriptions of new taxa and revisions of selected groups of living Cypraeidae (Mollusca: Gastropoda). Schriften zur Malakozoologie aus dem Haus der Natur-Cismar 20: 1-292, pl. 1-40
  2. ^ a b c d e f Meyer C. P. (2003) "Molecular systematics of cowries (Gastropoda: Cypraeidae) and diversification patterns in the tropics". Biological Journal of the Linnean Society 79(3): 401–459. doi:10.1046/j.1095-8312.2003.00197.x

Further reading

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