Peraclidae
Encyclopedia
Peraclidae is a family of pelagic sea snail
Sea snail
Sea snail is a common name for those snails that normally live in saltwater, marine gastropod molluscs....

s or "sea butterflies", marine
Marine (ocean)
Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...

 gastropod mollusks in the superfamily Cymbulioidea
Cymbulioidea
Cymbulioidea is a taxonomic superfamily of pelagic "sea butterflies". These are holoplanktonic opisthobranch molluscs in the clade Thecosomata.-Anatomy:...

.

This family has no subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005
Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi is currently the most up-to-date overall system for classifying gastropod mollusks...

).

This family was originally called Procymbuliidae Tesch, 1913 and then called Peraclididae by Wenz in 1938. The name Peraclidae takes precedence.

Peracle is the type genus of the family Peraclidae.

Description

The left-coiled shell
Gastropod shell
The gastropod shell is a shell which is part of the body of a gastropod or snail, one kind of mollusc. The gastropod shell is an external skeleton or exoskeleton, which serves not only for muscle attachment, but also for protection from predators and from mechanical damage...

 resembles the shell of most snails. The columella is somewhat elongated into a curved rostrum. There is an operculum
Operculum (gastropod)
The operculum, meaning little lid, is a corneous or calcareous anatomical structure which exists in many groups of sea snails and freshwater snails, and also in a few groups of land snails...

 and a gill
Gill
A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water, afterward excreting carbon dioxide. The gills of some species such as hermit crabs have adapted to allow respiration on land provided they are kept moist...

.

Species

Species within the genus Peracle Forbes, 1844 include:
  • Peracle charlotteae
    Peracle charlotteae
    Peracle charlotteae is an extinct species of fossil pelagic sea snail, or "sea butterfly", a planktonic marine gastropod mollusk in the family Peraclidae....

    Janssen & Little, 2010
  • Peracle depressa Meisenheimer, 1906 - Distribution: Cuba, Brazil, Argentina, Oceanic, Equatorial Atlantic.
  • Peracle diversa (Monterosato, 1875) - synonyms: Peracle apicifulva Meisenheimer, 1906,
  • Peracle bispinosa Pelseneer
    Paul Pelseneer
    Jean Paul Louis Pelseneer was a Belgian malacologist, morphologist, ethologist and phylogenist....

    , 1888, Two-spine pteropod. Distribution: Florida, Bermuda, Cuba, Argentina, Mediterranean. Length: 4 mm.
  • Peracle moluccensis Tesch, 1903 - Distribution: Panama, Brazil, British Isles, Oceanic. Length: 3 mm.
  • Peracle philiporum (R. W. Gilmer, 1990) - Distribution: Bahamas. Length: 4.5 mm.
  • Peracle reticulata (d'Orbigny
    Alcide d'Orbigny
    Alcide Charles Victor Marie Dessalines d'Orbigny was a French naturalist who made major contributions in many areas, including zoology , palaeontology, geology, archaeology and anthropology....

    , 1836) - Reticulate pteropod. Distribution: Oceanic, Florida, Texas; Mediterranean. Length: 6 mm. Description: the shell, which shows a hexagonal pattern, is rather heavy and compels this little animal to flap continuously to keep afloat. Table 4, figure 2
  • Peracle triacantha (P. Fischer, 1882) - Distribution: Oceanic, Cuba, Bermuda, Venezuela, Mediterranean. Length: 5 mm
  • Peracle valdiviae Meisenheimer 1905 - Distribution: Oceanic, Argentina. Length: 5 mm.

Further reading

  • Giovine F. (1988). "The genus Peracle in the Mediterranean (Heterobranchia: Peraclidae)". La Conchiglia
    La Conchiglia
    La Conchiglia , or The Conch, is a short film from Somali writer and director Abdulkadir Ahmed Said.-Plot:A female artist is painting a seascape on a deserted beach when she discovers a beautiful conch. Curious, she puts her ear to it and listens to the echoes and sounds of the ocean waves...

    20(226-227): 22-24, 5 figs.
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