CRYSOMALLON SQUAMIFERUM PDF

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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The scaly-foot snail has also harnessed the power of chemosynthesis, housing endosymbiotic bacteria — bacteria living inside another creature to mutual benefit — in an enlarged part of its gut. This site uses Akismet to reduce spam. For identification of trophic interactions in a habitat, where direct observation of feeding habits is complicated, there were measured carbon and nitrogen stable-isotope compositions.

List of clade, family, species and genes used in the five-genes phylogenetic reconstruction with GenBank accession numbers. Sole of foot surrounded by pedal flange.

S2E; Nakamura et al. DNA primers for amplification of mitochondrial cytochrome c oxidase subunit I from diverse metazoan invertebrates.

Chrysomallon squamiferum – Wikispecies

Shell diameter is the greatest width measured at right angle to the shell axis; shell height is the greatest distance from apex to basal lip along the shell axis; dorsal-ventral measurement is the greatest thickness of the shell along the suamiferum axis. The shell structure consists of three sqamiferum. A new genus and species of neomphalid limpet from the Mariana vents: Node values are Bayesian posterior probabilities.

Numerous papers have been published on various aspects of the biology and ecology of this species e. Multispiral, concentric in juveniles.

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Scaly-foot gastropod

The status of the species within the clade Neomphalina is investigated using the specimens collected crysomallno Longqi vent field including holotype and paratypes and also taking into account published information from the other two known populations. Marginal teeth elongate with a truncated distal end dividing into about 20 slender denticles. The scaly-foot gastropod is a vent-endemic gastropod known only from the deep-sea hydrothermal vents of the Indian Ocean, which are around 2, metres 1.

The foot is also unusual, being armored at the sides with iron-mineralised sclerites. The function of the scales is postulated to be either protection or detoxification but their true use remains a mystery.

Chrysomallon also has a truncated comb-like ending to the marginal teeth, which is present in only the Peltospiridae and Melanodrymiidae.

Views Read Edit View history. Notify me of new posts via email. A juvenile with operculum indicated by red pointer. An operculum of an adult snail.

Line of best fit: The anatomy of Pachydermia laevis Archaeogastropoda: Only sequences with good quality matching forward and reverse readings were used in downstream analyses.

Some bacteria, however, are able to use it to produce energy in a process known as chemosynthesis. This species is considered to be one of the most peculiar deep-sea hydrothermal-vent gastropods, and it is the only known extant animal that incorporates iron sulfide into its skeleton into both its sclerites and into its shell as an exoskeleton.

Columellar region covered by thin callus. The above description is based on specimens from the type locality: Fill in your details below or click an icon to log in: An operculum of juvenile snail. Foot large, unable to contract entirely into shell, red when alive. The models selected were as follows: Interconnected pedal nerves large, conspicuous under oesophageal gland.

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Scaly-foot gastropod Chrysomallon squamiferum from Longqi.

Close mobile search navigation Article navigation. This clade includes about 50 species and is well supported as monophyletic by molecular studies e.

File:Chrysomallon squamiferum 3.png

The scaly-foot gastropod has a thick snout, which tapers distally to a blunt end. Chrysomallon Greekgolden haired. High connectivity of animal populations in deep-sea hydrothermal vent fields in the Central Indian Ridge relevant to its geological setting.

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At the posterior of the ctenidium is a remarkably large and well-developed heart. Crysomaplon delicata McLean, The ctenidium provides oxygen for the snail, but the circulatory system is enlarged beyond the scope of other similar vent gastropods. Oesophageal gland and gonad are partly dissected to show structures underneath or within. Heart monotocardian with discrete auricle and ventricle.

The erection of the new monotypic genus is supported by both morphological and molecular characterization, differentiating it from existing genera of the family Peltospiridae.

Very large for Peltospiridae, up to Email required Address never made public. The abundance of scaly-foot gastropods was lower in the Kairei field than in the Longqi field. Details of central and lateral teeth. This species attracted much attention because it had hundreds of black metallic sclerites covering its foot. Shell measurements were carried out with digital vernier callipers.

Surface sculptured with subtle, closely-spaced ribs.