Livonia mammilla

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Livonia mammilla
Livonia mammilla 1.jpg
Shells of Livonia mammilla
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Family: Volutidae
Genus: Livonia
Species:
L. mammilla
Binomial name
Livonia mammilla
(Sowerby I, 1844)
Synonyms

Voluta mammillaG.B. Sowerby I, 1844 (basionym)

Livonia mammilla, common name false melon or false baler, is a species of sea snail, a marine gastropod mollusk of the genus Livonia in the family Volutidae, the volutes. [1]

Contents

Distribution

This marine species occurs off South East Australia [1] from Western Victoria to New South Wales, Southern Queensland and Tasmania. [2] [3] [4]

Description

A shell of Livonia mammilla Volutidae - Livonia mammilla.JPG
A shell of Livonia mammilla

Shells of Livonia mammilla can reach a size of 100–303 millimetres (3.9–11.9 in). [3] These large shells are characterized by a greatly swollen apex and a lightweight protoconch with a diameter of about 20 millimetres (0.79 in). Whorls are smooth and rounded, with axial growth lines and weak spiral grooves on the top of the body whorl. Columella shows four plaits and the outer lip is smooth and flared outwards. The background colour is yellowish-brown or cream, while the inner edge of outer lip may be white or orange. Body whorl usually has two wide spiral bands of axial zigzag brown lines, but this pattern is variable. [5]

The distinctive patterns on the shell are produced by a process analogous to a linear cellular automaton and can accordingly resemble fractal shapes like the Sierpinski gasket. [6]

Habitat

These moderately common sea snails live in subtidal waters and offshore on sand and mud, at depths of 73 to 457 m., emerging at night to feed. [5] [7]

Bibliography

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References

  1. 1 2 Livonia mammilla (Sowerby I, 1844) . Retrieved through: World Register of Marine Species  on 25 April 2010.
  2. ↑ Memoirs of the Museum of Victoria, pg. 255
  3. 1 2 "Livonia (Livonia) mammilla". Gastropods.com. Retrieved 12 January 2019.
  4. ↑ Australia Biological Resources
  5. 1 2 Des Beechey Sea Shells of NSW
  6. ↑ Wolfram, Stephen (2002). A New Kind of Science. Wolfram Media. p.  423. ISBN   1579550088.
  7. ↑ Molluscs of Tasmania


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