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Chrysallidinae
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Orthogastropoda
Order: Heterostropha
Superfamily: Pyramidelloidea
Family: Pyramidellidae
Subfamily: Chrysallidinae
Saurin, 1958
Genera

See text. Molluscs are animals belonging to the phylum Mollusca. There are around 250000 extant Species within the phylum with an estimated 70000 The class Gastropoda or the gastropods, also previously known as gasteropods, or univalves, and more commonly known as Snails Orthogastropoda is one of two major Taxonomic groupings of snails and slugs an extremely large Subclass within the huge class Gastropoda. Above the species level close to 400 named taxa are referred to the gastropod superfamily Pyramidelloidea. Pyramidellidae, Common name the pyram family, or pyramid shells, is a voluminous Taxonomic family of mostly small and minute

Chrysallidinae is a taxonomic group of very small sea snails, one of eleven recognized subfamilies of the gastropod family Pyramidellidae (according to the taxonomy of Ponder & Lindberg 1997). Taxonomy is the practice and science of classification The word comes from the Greek, taxis (meaning 'order' 'arrangement' and, nomos The word snail is a Common name that can be used for almost all members of the Molluscan class Gastropoda which have coiled shells in the In Biological classification, family ( Latin The class Gastropoda or the gastropods, also previously known as gasteropods, or univalves, and more commonly known as Snails Pyramidellidae, Common name the pyram family, or pyramid shells, is a voluminous Taxonomic family of mostly small and minute (The other 10 subfamilies are Odostomiinae, Turbonillinae, Cingulininae, Cyclostremellinae, Sayellinae, Syrnolinae, Eulimellinae, Pyramidellinae, Odostomellinae and Tiberiinae. Odostomiinae, Odostomia snails and their allies is a Taxonomic Subfamily of minute Parasitic sea Snails These are marine Turbonillinae is a Subfamily of mostly minute parasitic sea Snails marine Gastropod Molluscs in the family Pyramidellidae Cingulininae is a Taxonomic Subfamily of very small sea Snails, marine Gastropod Mollusks It is one of eleven recognised Cyclostremellinae is a Subfamily, a Taxonomic grouping of minute sea Snails marine Gastropod Mollusks or Micromollusks Sayellinae is a Taxonomic Subfamily of minute ectoparasitic sea Snails marine Gastropod Molluscs or Syrnolininae is a Subfamily of minute parasitic sea Snails marine Heterobranch Gastropod Molluscs in the Eulimellinae is a Subfamily of minute sea Snails marine Gastropod Molluscs in the family Pyramidellidae, the pyrams Pyramidellinae is a taxonomic Subfamily of minute sea Snails marine Gastropod Mollusks in the family Pyramidellidae Odostomellinae is a Taxonomic Subfamily of minute sea Snails marine Gastropod Molluscs within the family Pyramidellidae Tiberiinae is a Subfamily of minute parasitic sea Snails marine Gastropod Molluscs in the family Pyramidellidae )

However, in the taxonomy of Bouchet & Rocroi (2005), this subfamily has been downgraded to the rank of tribe Chrysallidini Saurin, 1958 in the subfamily Pyramidellinae Gray, 1840 . The new Gastropod Taxonomy of Bouchet & Rocroi (2005 (in collaboration with J In Biology, a tribe &mdashor infrafamily&mdashis a Taxonomic rank between family and Genus. Pyramidellinae is a taxonomic Subfamily of minute sea Snails marine Gastropod Mollusks in the family Pyramidellidae

According to Schander, Van Aartsen & Corgan (1999) there are 47 genera in this subfamily, four additional genera may also be a part of this taxon.

Contents

Genera in the subfamily Chrysallidinae

Genera likely to reside in the subfamily Chrysallidinae

Distribution

This family is found worldwide, from the tropics to the Arctic. William Healey Dall, ( August 21, 1845 - March 27, 1927) was a great American naturalist and a prominent malacologist Trabecula is a Genus of very small sea Snails, marine Gastropod Mollusks or Micromollusks in the family Pyramidellidae

Shell description

The shell of these snails has a blunt, heterostrophic protoconch, which is often wrapped up. A protoconch (meaning first or earliest or original shell is an Embryonic or Larval shell of some classes of Molluscs e The texture of these shells is sculptured in various forms such as ribs and spirals. Sculpture on a Mollusc shell is whatever natural 3-dimensional ornamentation exists on the outer surface of a shell apart from the basic shape of the shell itself Their color is mostly white, cream or yellowish. The teleoconch is dextrally coiled, but the larval shells are sinistral. A larva ( Latin; plural larvae) is a juvenile form of Animal with indirect development, undergoing Metamorphosis (for example This results in a sinistrally coiled protoconch. The columella has one, spiral fold. The columella (meaning little column is an anatomical feature of a coiled Snail shell or Gastropod shell. A plait is a feature which is present in some Snail shells. This feature occurs often in the shells of marine Gastropod Mollusks The aperture is closed by an operculum. The operculum, meaning little lid (plural opercula or operculums is a corneous or Calcareous structure which exists in some groups of marine freshwater and land

Life habits

The Chrysallidinae are ectoparasites, feeding mainly on other molluscs and on annelid worms. Parasitism is a type of symbiotic relationship between Organisms of different Species. A worm is a common name given to a diverse group of invertebrate animals that have a long soft body and no legs

They do not have a radula. The radula is a toothed Chitinous ribbon typically used for scraping cutting and chewing food before it enters the Esophagus. Instead their long proboscis is used to pierce the skin of its prey and suck up its fluids and soft tissues. In general a proboscis (from Greek προ pro "before" and βοσκειν boskein "to feed" also known as probiscus 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. The mentum refers to a projecting structure near the mouth of any of several animals In Insects the mentum is the distal part of the labium.

These molluscs are hermaphrodites, laying eggs in jelly-like masses on the shell of its host. A hermaphrodite is an organism having both male and female reproductive organs


References


Wikiproject Gastropods
 This gastropod-related article is a stub. The class Gastropoda or the gastropods, also previously known as gasteropods, or univalves, and more commonly known as Snails You can help Wikipedia by expanding it.
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