Marginellidae | |
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A live individual of Marginella mosaica , head end towards the right | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Caenogastropoda |
Order: | Neogastropoda |
Superfamily: | Volutoidea |
Family: | Marginellidae Fleming, 1828 |
Diversity [1] | |
2 freshwater species, others are marine |
Marginellidae, or the margin shells, are a taxonomic family of small, often colorful, sea snails, marine gastropod molluscs in the clade Neogastropoda.
The higher classification of the family Marginellidae has long been in a state of confusion. Many popular works still treat all members of this family under the single genus Marginella, basing them primarily on superficial similarities of the shell.
The confusion over the classification stems from the fact that the earlier classifications were based rather crudely on shell characters. Although many good differential shell characters do exist within this group, those characters were generally misinterpreted or not recognized as significant. Such information as did exist on the radulae and the external anatomy of the living animals was widely scattered in the scientific literature, and internal anatomical descriptions were not available until fairly recently.
In 2019 a new molecular phylogeny of marginelliform gastropods has been established by Fedosov A.E., Caballer Gutierrez M., Buge B., Sorokin P.V., Puillandre N., Bouchet P. [2]
The shell of Marginellidae is usually small, but varies in different species from minute to medium-sized. The external color of the shell can be white, cream, yellow, orange, red, or brown, and can be uniformly colored, or patterned in various ways. The protoconch is paucispiral. The lip of the shell is thickened, and can be smooth or denticulate. An external varix may be present or absent, a siphonal notch may be present or absent. The columella may have 2-6 plications. The operculum is absent in this family.
Subfamily Incertae sedis
Marginella is a very large genus of small tropical and temperate sea snails, marine gastropod molluscs in the subfamily Marginellinae of the family Marginellidae, the margin snails. It is a type of genus family.
Gibberula is a genus of minute sea snail, a marine gastropod mollusk or micromollusk in the family Cystiscidae, previously placed in the family Marginellidae, the margin shells or marginellids.
Volvarina is a genus of small to very small sea snails, marine gastropod molluscs in the family Marginellidae, the margin shells.
Cystiscidae is a taxonomic family of minute sea snails, marine gastropod mollusks or micromollusks.
Plesiocystiscus is a genus of minute predatory sea snails, marine gastropod molluscs or micromolluscs in the family Cystiscidae.
Cystiscus is a taxonomic genus of minute sea snails, marine gastropod mollusks or micromollusks.
Persiculinae is a taxonomic subfamily of minute to small predatory sea snails, marine gastropod mollusks. This subfamily includes several species which are micromollusks.
Bullata is a genus of small to large sea snails, marine gastropod mollusks in the family Marginellidae, the margin snails.
Volvarina monilis is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.
Volvarina avenella is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.
Alaginella is a genus of sea snails, marine gastropod mollusks in the subfamily Austroginellinae of the family Marginellidae.
Cryptospira is a genus of sea snails, marine gastropod mollusks in the subfamily Pruninae of the family Marginellidae, the margin snails.
Mesoginella is a genus of sea snails, marine gastropod mollusks in the family Marginellidae, the margin snails.
Serrata is a genus of sea snails, marine gastropod molluscs in the subfamily Austroginellinae of the family Marginellidae, the margin snails.
Glabella is a genus of small tropical and warm-water sea snails, marine gastropod molluscs in the family Marginellidae, the margin snails.
Marginellinae is a taxonomic subfamily within the larger family of Marginellidae, a group of small sea snails, marine gastropod molluscs in the superfamily Volutoidea.
Austroginellinae is a taxonomic subfamily within the larger family of Marginellidae, a group of small sea snails, marine gastropod molluscs in the superfamily Volutoidea.
Pruninae is a taxonomic subfamily within the larger family of Marginellidae, a group of small sea snails, marine gastropod molluscs in the superfamily Volutoidea.
Ovaginella is a genus of marginellid minute sea snails, marine gastropod mollusks in the subfamily Austroginellinae of the family Marginellidae, the margin snails.
Volvarina hedleyi is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.