Variegated tun | |
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Apertural view of a shell of Tonna variegata (museum specimen at Naturalis Biodiversity Center) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Caenogastropoda |
Order: | Littorinimorpha |
Family: | Tonnidae |
Genus: | Tonna |
Species: | T. variegata |
Binomial name | |
Tonna variegata (Linnaeus, 1758) | |
Synonyms | |
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Tonna variegata, commonly known as the variegated tun, is a species of marine gastropod mollusc in the family Tonnidae (also known as the tun shells). [1]
The forma Tonna variegata f. dunkeri(Hanley, 1860) is a synonym of Tonna dunkeri (Hanley, 1860)
The size of the shell varies between 70 mm and 200mm.
The thin shell has an ovate-globose, ventricose shape. The spire is composed of six convex whorls, slightly separated by a shallow suture, and loaded with transverse rounded ribs, which are very approximate. The body whorl composes, itself, almost the whole of the shell. Twenty to twenty-six transverse ribs may be counted upon its surface, among which, in old specimens, are found other smaller ones which are alternately disposed between the first, towards the most elevated part. All the ribs are separated by furrows which are not throughout of the same size. The aperture is wide, large and ovate. Its lips are white, and the interior reddish. The outer lip, terminated by a scolloped dilatation, is traversed by a canal of no great depth. The inner lip is white, thin, applied to the body of the body whorl and forms a part of the umbilicus. The columella is twisted spirally. The coloring of the exterior is whitish, varied with red, and covered, upon the transverse ribs, with irregular spots which sometimes form longitudinal or zigzag bands of a deeper color. Upon some specimens are observed ribs which have no other tint of coloring than the ground of the shell. Young specimens are diaphanous and slightly colored by spots. The periostracum is thin and reddish. [2]
This marine species occurs off South and Southeast Africa; off New Zealand and off Australia (Western Australia).
Tonna cumingi, common name Cuming's tun, is a species of very large sea snail, a tun snail, a marine gastropod mollusc in the family Tonnidae, the tuns.
Tonna is a genus of large sea snails, marine gastropod molluscs in the family Tonnidae, the tun or cask shells.
Tonna dolium, common name the spotted tun, is a species of large sea snail or tun snail, a marine gastropod mollusc in the family Tonnidae, the tun shells.
Tonna galea, commonly known as the giant tun, is a species of marine gastropod mollusc in the family Tonnidae. This very large sea snail or tun snail is found in the North Atlantic Ocean as far as the coast of West Africa, in the Mediterranean Sea and the Caribbean Sea. The species was first described by Carl Linnaeus in 1758.
Tonna perdix, common name the partridge tun, is a species of very large sea snail, a marine gastropod mollusc in the family Tonnidae, the tun shells.
Nassarius pullus, common names : black nassa; olive dog whelk; ribbed dog whelk, is a species of sea snail, a marine gastropod mollusc in the family Nassariidae, the nassa mud snails or dog whelks.
Harpa amouretta, common name the lesser harp, is a species of sea snail, a marine gastropod mollusk in the family Harpidae, the harp snails.
Harpa articularis, common name the articulate harp shell, is a species of sea snail, a marine gastropod mollusk in the family Harpidae, the harp snails.
Malea pomum, common name the Pacific grinning tun, is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Malea ringens, common name the grinning tun, is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Tonna allium, common name the costate tun, is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Tonna boucheti is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Tonna dunkeri is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Tonna lischkeana is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Tonna morrisoni is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Tonna oentoengi is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Tonna pennata is a large species of sea snail, a marine gastropod mollusc in the family Tonnidae, the tun shells. Commonly known as the Atlantic partridge tun, the species is a predator of animals much larger than itself, particularly sea cucumbers.
Tonna sulcosa, common name banded tun, is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Tonna tessellata, the mosaic tun, tessellate tun or maculated tun, is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae.
Tonna chinensis, common name : the China tun, is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.