Evolution and Systematics

Functional Adaptations

Functional adaptation

Magnesium substitution prevents cracks: sea snail
 

The egg capsule of a sea snail resists cracks due to substituting calcium with magnesium.

   
  "A surprising discovery is what we believe is the first record of high-magnesium calcite in molluscs. This mineral is a calcium carbonate polymorph in which Ca2+ is randomly substituted to some extent by Mg2+ in the calcite lattice; Mg substitutions over 4% (values found in O. [Odontocymbiola] magellanica capsules were 13.4– 21.1%) are considered to be high (Ries & Blaustein, 2003)...It is thought that magnesium substitution may impart a greater crack resistance to the calcite (Magdans & Gies, 2004)." (Bigatti et al. 2010:284, 286)
  Learn more about this functional adaptation.
  • Bigatti G; Giraud-Billoud M; Vega I A; Penchaszadeh P E; Castro-Vazquez A. 2010. The calcareous egg capsule of the Patagonian neogastropod Odontocymbiola magellanica: morphology, secretion and mineralogy. Journal of Molluscan Studies. 76: 279–288.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:258Public Records:133
Specimens with Sequences:187Public Species:23
Specimens with Barcodes:180Public BINs:37
Species:31         
Species With Barcodes:25         
          
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Barcode data

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Volutidae

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Wikipedia

Volutidae

Volutidae, common name volutes, are a taxonomic family of predatory sea snails that range in size from 9 mm to over 500 mm, marine gastropod mollusks. Most of the species have no operculum.

Contents

Distribution

This family of sea snails are found mainly in tropical seas, though some species also inhabit the waters of the polar circles.

Shell description

The shell of species such as Melo amphora can grow as large as 50 cm (19.7 inches) in length.[1]

Volutes are distinguished by their distinctively marked spiral shells (to which the family name refers, voluta meaning "scroll" in Latin).

The shells have an elongated aperture in their first whorl and an inner lip characterised by a number of deep plaits. The elaborate decorations of the shells has made them a popular collectors' item, with the imperial volute (Voluta imperialis) of the Philippines being particularly prized.

Taxonomy

Subfamilies and tribes

According to Bail & Poppe (2001)[2] Volutidae can be subdivided into the following Subfamilies and tribes:

Genera

Genera within the Volutidae include:

Apertural view of a shell of Scaphella junonia
Two views of a shell of Scaphella lamberti, and in the center, a cut-down shell showing the folds on the columella

References

  1. ^ Poutiers, J. M. (1998). Gastropods in: FAO Species Identification Guide for Fishery Purposes: The living marine resources of the Western Central Pacific Volume 1. Seaweeds, corals, bivalves and gastropods. Rome, FAO, 1998. page 597.
  2. ^ Bail, P. & Poppe, G. T. (2001). A taxonomic introduction to the recent Volutidae. In: Poppe, G. T. & Groh, K.: A Conchological Iconography. 30 pp., 5 plts. ConchBooks, Hackenheim, ISBN 3-925919-47-3.
  3. ^ Bail, P., Limpus, A. & Poppe, G. T. (2001): The Genus Amoria. In: Poppe, G. T. & Groh, K.: A Conchological Iconography. 50 pp., 93 plts. ConchBooks, Hackenheim, ISBN 3-925919-46-5.
  4. ^ Bail, P., Chino, M. & Terryn, Y. (2010). The Family Volutidae. The endemic Far East Asian subfamily Fulgorariinae Pilsbry & Olsson, 1954. A revision of the recent species. In: Poppe, G. T. & Groh, K.: A Conchological Iconography. 74 pp., 64 plts. ConchBooks, Hackenheim, ISBN 978-3-939767-31-2.
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