The present study gives a formal name to the ‘scaly-foot gastropod’, Chrysomallon squamiferum n. gen., n. sp. with Longqi vent field as the type. As greigite is magnetic, the animal actually sticks to magnets. The three known populations of Chrysomallon squamiferum: Kairei, Longqi. Chrysomallon squamiferum Chen, Linse, Copley, & Rogers, For more multimedia, look at Chrysomallon squamiferum on Wikimedia Commons.

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Foot large; epipodium lacking epipodial tentacles, covered by hundreds of hard dermal sclerites.

File:Chrysomallon squamiferum – Wikipedia

This is likely cryslmallon result from the lack of iron in the vent fluid of Solitaire Nakamura et al. Gastropods from recent squamoferum vents and cold seeps: Each layer appear to contribute to the effectiveness of the snail’s defense in different sqjamiferum. The shell roughly resembles Peltospira McLean, in shape, but the initial whorl is depressed and the shell does not have the strong lamellar sculpture that is present in all species of Peltospira.

Biological Journal of the Linnean Society. The Museum has recently received specimens of the enigmatic deep-sea vent snail, Chrysomallon squamiferumthe scaly-foot snail. All species used are the type species of their respective genera, except Nodopelta for which COI sequences of the type species N. A specimen of Chrysomallon squamiferum photographed live Photo: The crysomlalon structure consists of three layers. The shell and mantle tissue have been removed.

Both morphological and genetic results are consistent with the conclusion that the population newly discovered in Longqi vent field, SWIR represents the same species as the previously known populations in the Kairei and Solitaire fields, CIR.


Map created using Esri ArcMap v. Consensus tree reconstructed using Bayesian inference from a bp fragment of COI gene from species of Peltospiridae and Chrysomallon squamiferum n.

Close mobile search navigation Article navigation. No sexual dimorphism observed.

Scaly-foot Gastropod: The Snail With an Armor of Iron | Amusing Planet

The scaly-foot gastropod is an obligate symbiotroph throughout post-settlement life. Close-up of the scales, also showing the reduced operculum in middle.

Coiled shell with three whorls; spire compressed; aperture elliptic. Rapid convergence at hydrothermal vents shown by 3D anatomical reconstruction of Gigantopelta Mollusca: Egg-capsule deposition of the marine gastropod Olivella minuta: Peltospiridae from the Indian Ocean”. A recent paper by Dr Chong Chen Department of Zoology, University of Oxford and colleagues finally gave it the scientific name you see here — Chrysomallon squamiferum. It has not been formally named, despite attracting great attention from both scientists and the general public alike, although a manuscript name has occasionally been used in various sources.

Allying with armored snails: The total sequence lengths used were 2, bp for the five-gene tree and bp for the COI tree. The function of the scales is postulated to be either protection or detoxification but their true use remains a mystery. Scatterplot of shell diameter vs shell height of 50 specimens of Chrysomallon squamiferum n.

Scaly-foot gastropod

Scaly-foot gastropod was first discovered in at a depth of over two kilometers in central Indian Ocean, deep squamiverum hydrothermal vent fields. This is what makes rotten eggs smell bad, and is toxic to most organisms. Three whorls, globose with depressed spire, tightly coiled. Heterobranchia from Argentina triples their diversity in northern Patagonia. The ctenidium provides oxygen for the snail, but the circulatory system is enlarged beyond the scope of other similar vent gastropods.


Scaly-foot gastropod is magnetic and sticks to magnets. Earth and Planetary Science Letters. The specimens from the Solitaire vent field are not covered in iron cryeomallon and thus have white sclerites and a light brown shell resulting from the exposed periostracum Nakamura et al.

Range and proportion to shell diameter calculated from 50 specimens across a size range. Explicit use of et al. Although the SWIR and CIR populations are genetically similar, the question as to whether connectivity is maintained over the intervening distance needs further investigation. Columellar region covered by thin callus.

The scaly snail— Goffredi et al. Morphological and genetic comparisons of the Longqi specimens with Kairei and Solitaire specimens lead to the conclusion that the populations at the three vent fields represent one single species belonging to the family Peltospiridae.

Peltospira operculata McLean, Interconnected pedal nerves large, conspicuous under oesophageal gland. Map of deep-sea hydrothermal vent fields where Chrysomallon squamiferum n. Non-neomphaline gastropod outgroups were selected from Vetigastropoda, Cocculiniformia, Caenogastropoda and Patellogastropoda.

Shifts to curved, bent shape in adult Chen et al. Phylogenetic reconstruction was carried out with Bayesian inference using MrBayes v. The snail’s oesophageal gland houses symbiotic gammaproteobacteria from which the snail appears to obtain its nourishment.