Odostomiinae

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Odostomiinae
Odostomia - Sowerby (detail).jpg
Odostomia pallida , O. conoidea , O. conspicua , O. truncatula
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Subcohort: Panpulmonata
Superfamily: Pyramidelloidea
Family: Pyramidellidae
Subfamily: Odostomiinae
P. Pelseneer, 1928 [1]
Synonyms [2]

synonyms of Odostomiini:

  • Ptychostomonidae Locard, 1886
  • Liostomiini Schander, Halanych, Dahlgren & Sundberg, 2003 [3] (n.a.)

Odostomiinae, Odostomia snails and their allies, is a taxonomic subfamily of minute parasitic sea snails. These are marine heterobranch gastropod mollusks, or micromollusks, in the family Pyramidellidae.

Contents

Taxonomy

The subfamily Odostomiinae has been recognized as monophyletic. [4]

It includes the tribe Liostomini, a name given to those genera which have an intorted protoconch. The rest of the genera however do not form a single monophyletic taxon.[ citation needed ]

Subfamily Odostomiinae has been classified as one of eleven recognised subfamilies of the very voluminous gastropod family Pyramidellidae (according to the taxonomy of Ponder & Lindberg 1997): [5] Odostomiinae, Turbonillinae, Chrysallidinae, Cingulininae, Cyclostremellinae, Sayellinae, Syrnolinae, Eulimellinae, Pyramidellinae, Odostomellinae and Tiberiinae.

In the taxonomy of Bouchet & Rocroi (2005), [2] this subfamily also comprises the subfamilies Chrysallidinae, Cyclostremellinae and Odostomellinae, that they have downgraded to the rank of tribe.

subfamily Odostomiinae Pelseneer, 1928

According to Schander, Van Aartsen and Corgan (1999) there are 33 genera in Odostominae with four possible additional genera of uncertain status. [6]

Genera

Genera in the subfamily Odostomiinae include:

tribe Odostomiini

tribe Chrysallidini

tribe Cyclostremellini

tribe Odostomellini

Additional genera

Some additional genera which may belong in the subfamily Odostomiinae are:

Distribution

This family is found worldwide, from the tropics to the poles.

Shell description

The shell of these snails has a blunt, heterostrophic protoconch, which is often pointed sideways or wrapped up. Most species in the subfamily have shells which are smaller than 13 mm. The texture of these shells is most often smooth but sometimes sculptured in various forms such as ribs and spirals. Their color is mostly white, cream or yellowish, sometimes with red or brown lines. The teleoconch is dextrally coiled, but the larval shells are sinistral. This results in a sinistrally coiled protoconch. The columella has usually one, but sometimes several, spiral folds. The aperture is closed by an operculum.

Life habits

The Odostomiinae are ectoparasites, feeding mainly on other molluscs and on annelid worms, but some are known to feed on peanut worms and crustaceans. [7]

They do not have a radula. Instead their long proboscis is used to pierce the skin of its prey and suck up its fluids and soft tissues. The eyes on the grooved tentacles are situated toward the base of the tentacles. Between the head and the foot, a lobed process called the mentum ( = thin projection) is visible. These molluscs are hermaphrodites.

Related Research Articles

<span class="mw-page-title-main">Pyramidellidae</span> Family of sea snails

Pyramidellidae, common name the pyram family, or pyramid shells, is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails, marine heterobranch gastropod molluscs. The great majority of species of pyrams are micromolluscs.

<span class="mw-page-title-main">Turbonillinae</span> Subfamily of gastropods

Turbonillinae is a subfamily of mostly minute parasitic sea snails, marine gastropod molluscs in the family Pyramidellidae, the pyrams and their allies.

<span class="mw-page-title-main">Chrysallidini</span> Tribe of molluscs

Chrysallidinae is a taxonomic group of very small sea snails, marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Cingulinini is a taxonomic tribe of very small sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.

Cyclostremellini is a minor tribe, a taxonomic grouping, of minute sea snails, marine gastropod mollusks or micromollusks, in the family Pyramidellidae, the pyrams and their allies.

Syrnolininae is a subfamily of minute parasitic sea snails, marine heterobranch gastropod molluscs in the family Pyramidellidae, the pyrams and their allies.

Eulimellini is a tribe of minute sea snails, marine gastropod molluscs in the family Pyramidellidae, the pyrams and their allies.

<i>Tiberia</i> Genus of gastropods

Tiberia is a genus of minute parasitic sea snails, marine gastropod molluscs in the family Pyramidellidae, the pyrams and their allies. Tiberia is the only genus in the tribe Tiberiini.

<span class="mw-page-title-main">Pyramidellinae</span> Subfamily of sea snails

Pyramidellinae is a taxonomic subfamily of minute sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.

<span class="mw-page-title-main">Odostomellini</span> Tribe of gastropods

Odostomellini is a taxonomic tribe of minute sea snails, marine gastropod molluscs within the family Pyramidellidae the pyrams and their allies.

<span class="mw-page-title-main">Pyramidelloidea</span> Superfamily of gastropods

Pyramidelloidea is a superfamily of mostly very small sea snails, marine gastropod mollusks and micromollusks within the clade Panpulmonata.

<i>Trabecula</i> (gastropod) Genus of gastropods

Trabecula is a genus of very small sea snails, marine gastropod molluscs or micromolluscs in the family Pyramidellidae, the pyrams and their allies, and the subfamily Chrysallidinae, a large taxon of minute marine gastropods with an intorted protoconch.

Fargoa is a genus of very small sea snails, marine gastropod mollusks in the tribe Chrysallidini within the family Pyramidellidae.

<i>Chrysallida</i> Genus of gastropods

Chrysallida is a speciose genus of minute sea snails, pyramidellid gastropod mollusks or micromollusks in the family Pyramidellidae within the tribe Chrysallidini.

<i>Odostomia</i> Genus of gastropods

Odostomia is the most speciose genus of minute sea snails, pyramidellid gastropod mollusks. This genus is placed in the family Pyramidellidae in the subfamily Odostomiinae. There are several hundred species in this diverse genus

<i>Parthenina</i> Genus of gastropods

Parthenina is a genus of very small sea snails, pyramidellid gastropod mollusks or micromollusks.

Siogamaia is a small genus of very small sea snails, pyramidellid gastropod mollusks or micromollusks. This genus is currently placed in the subfamily Chrysallidinae of the family Odostomiidae. The genus was originally described as a subgenus of Tropaeas Dall & Bartsch, 1904, but was later erected to a full genus and placed within Chysallidinae by Schander et al. (1999).

Murchisonellidae is a taxonomic family of sea snails, marine opisthobranch gastropod mollusks in the superfamily Murchisonelloidea.

Pyrgulina is a small genus of very small sea snails, pyramidellid gastropod mollusks or micromollusks. This genus is currently placed in the subfamily Chrysallidinae of the family Odostomiidae.

References

  1. ↑ Pelseneer, P. (1928). "Les Parasites des Mollusques et les Mollusques parasites". Bulletin de la Société Zoologique de France. 53: 158–189.
  2. 1 2 Bouchet, Philippe; Rocroi, Jean-Pierre; Frýda, Jiri; Hausdorf, Bernard; Ponder, Winston; Valdés, Ángel & Warén, Anders (2005). "Classification and nomenclator of gastropod families". Malacologia . Hackenheim, Germany: ConchBooks. 47 (1–2): 1–397. ISBN   3-925919-72-4. ISSN   0076-2997.
  3. ↑ Schander C., Halanych K. M., Dahlgren T. & Sundberg, P. (2003). "Test of the monophyly of Odostomiinae and Turbonillinae (Gastropoda, Heterobranchia, Pyramidellidae) based on 16S mtDNA sequences". Zoologica Scripta . 32 (3): 243–254. doi:10.1046/j.1463-6409.2003.00112.x. S2CID   84249963.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  4. ↑ Dinapoli, Angela; Carmen Zinnsmeister; Annette Klussmann-Kolb (10 September 2010). "New insights into the phylogeny of the Pyramidellidae (Gastropoda)". Journal of Molluscan Studies. 77 (1): 1–7. doi: 10.1093/mollus/eyq027 .
  5. ↑ Ponder, W.F. & Lindberg, D. R. (1997). "Towards a phylogeny of gastropod molluscs: an analysis using morphological characters". Zoological Journal of the Linnean Society. 119 (2): 88–265. doi: 10.1111/j.1096-3642.1997.tb00137.x .
  6. ↑ Schander, C., van Aartsen, J. J., Corgan, J. C. (1999). "Families and genera of the Pyramidelloidea (Mollusca: Gastropoda)". Bollettino Malacologico. 34 (9–12): 145–166.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  7. ↑ Sneli J.-A. (1972). "Odostomia turrita found on Hommarus gammarus". Nautilus. 86 (1): 23–24.
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