Tuns: Family Tonnidae
The tun shells or "tuns" are rare on S. Hutchinson Island. So far I've found one nearly complete Atlantic Partridge Tun, which is a rare shell (see below). The other tun shell I've found in broken form is the Giant Tun.
A rare Atlantic Partridge Tun, broken but easily identified (S. Hutchinson Island December, 2020.
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Tonnidae
From Wikipedia, the free encyclopedia
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Superfamily: Tonnoidea
Family: Tonnidae
Suter, 1913 (1825)
Genera
See text
Synonyms[1]
Doliidae Latreille, 1825
Galeodoliidae Sacco, 1891
Macgillivrayiidae H. Adams & A. Adams, 1854
The Tonnidae are a family of medium-sized to very large sea snails, known as the tun shells. These are marine gastropod molluscs in the clade Littorinimorpha. The name "tun" refers to the snails' shell shape which resembles wine casks known as "tuns". While the shells are thin, they are also strong. There is no operculum. They are found in all tropical seas, where they inhabit sandy areas. During the day, they bury themselves in the substrate, emerging at night to feed on echinoderms (especially sea cucumbers), crustaceans, and bivalves. Some larger species also capture fish, using their expandable probosces to swallow them whole. Females lay rows of eggs that become free-swimming larvae for several months before settling to the bottom.[2]
Taxonomy
In 2005, these subfamilies were recognized in the taxonomy of Bouchet & Rocroi:
Cassinae Latreille, 1825
Oocorythinae P. Fischer, 1885
Phaliinae Beu, 1981
Tonninae Suter, 1913
Bouchet & Rocroi (2005) listed Cassidae as a synonym of Tonnidae Suter, 1913 (1825), following Riedel (1995) in this. However, later Beu (2008: 272) separated the two families.[3] This is in agreement with the action of Thiele (1925) who placed Tonnidae and Cassidae under "Tonnacea", therefore acting as first reviser under ICZN article 24. In this respect, the World Register of Marine Species follows the opinion of Beu.[4]
Genera
Genera and species within the family Tonnidae include:
The subfamily Cassinae has been raised to the rank of family Cassidae
Eudolium Dall, 1889
Malea Vallenciennes, 1832
Tonna Brunnich, 1771
Genera brought into synonymy
Cadium Link, 1807 : synonym of Tonna Brunnich, 1771
Cadus Röding, 1798 : synonym of Tonna Brunnich, 1771
Cassidaria Link, 1807 : synonym of Eudolium Dall, 1889
Doliopsis di Monterosato, 1872 (non Vogt, 1852; non Conrad, 1865) : synonym of Eudolium Dall, 1889
Foratidolium Rovereto, 1899: synonym of Tonna Brünnich, 1771
Macgillivrayia Forbes, 1852 : synonym of Tonna Brünnich, 1771
Dolium Lamarck, 1801: synonym of Tonna Brunnich, 1771
Parvitonna Iredale, 1931: synonym of Tonna Brunnich, 1771
Perdix Montfort, 1810: synonym of Tonna Brunnich, 1771
Quimalea Iredale, 1929: synonym of Malea Valenciennes, 1832
Further reading
Vaught, K.C. (1989). A classification of the living Mollusca. American Malacologists: Melbourne, FL (USA). ISBN 0-915826-22-4. XII, 195 pp.
References
MolluscaBase eds. (2020). MolluscaBase. Rhytididae Pilsbry, 1893. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=816183 on 2020-10-22
Rehder, Harold A., 1981, National Audubon Society Field Guide to Shells, pg. 503
Beu A. G. (2008). "Recent deep-water Cassidae of the world. A revision of Galeodea, Oocorys, Sconsia, Echinophoria and related taxa, with new genera and species (Mollusca, Gastropoda)". In: Héros V., Cowie R. H. & Bouchet P. (eds). "Tropical Deep-Sea Benthos 25". Mémoires du Muséum National d'Histoire Naturelle 196: 269-387. abstract in French.
Gofas, S. (2011). Cassidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=22999 on 2011-02-23
External links
Wikimedia Commons has media related to Tonnidae.