Volvarina | |
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The shell and animal of Volvarina virginieae (holotype at MNHN, Paris) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Caenogastropoda |
Order: | Neogastropoda |
Family: | Marginellidae |
Subfamily: | Marginellinae |
Genus: | Volvarina Hinds, 1844 |
Type species | |
Marginella nitidaHinds, 1844 | |
Synonyms [1] | |
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Volvarina is a genus of small to very small sea snails, marine gastropod molluscs in the family Marginellidae, the margin shells. [1]
The difference between the genera Volvarina and Prunum is not clearly delineated and is based on morphological differences in the shells. Larger species with a strong callus are classified under Prunum, while the slender species with a thin callus are classified under Volvarina. Many species with characteristics that fall between the two extremes are ambiguous. Until at least 2010 there was no phylogenetic analysis to substantiate this classification. [1] Volvarina is paraphyletic in relation to Prunum and Hyalina. Their status remains uncertain.
The smooth or glossy shells are very small. They have a conical or cylindrical shape. The spire is usually low or sometimes slightly elevated. The anal sinus is absent. The outer lip is smooth or slightly incrassate. The inner lip shows three of four plaits; some species show a weaker fifth or sixth fold. They occupy about half the length of the aperture.
The genus is cosmopolitan with most species in warm and temperate seas.
Species within the genus Volvarina include: [1]
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.
Marginellidae, or the margin shells, are a taxonomic family of small, often colorful, sea snails, marine gastropod molluscs in the clade Neogastropoda.
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.
Granulina is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Granulinidae.
Plesiocystiscus is a genus of minute predatory sea snails, marine gastropod molluscs or micromolluscs in the family Cystiscidae.
Persicula is a taxonomic genus of minute to small predatory sea snails, marine gastropod mollusks. It 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.
Mirpurina mediocincta is a species of sea snail, a marine gastropod mollusc in the family Marginellidae, the margin snails.
Cryptospira is a genus of sea snails, marine gastropod mollusks in the subfamily Pruninae of the family Marginellidae, the margin snails.
Dentimargo is a genus of sea snails, marine gastropod mollusks in the family Marginellidae, the margin snails.
Hyalina is a genus of sea snails, marine gastropod mollusks in the subfamily Pruninae of the family Marginellidae, the margin snails.
Hydroginella is a genus of marginellid minute sea snails, marine gastropod mollusks in the subfamily Austroginellinae of the family Marginellidae, the margin snails.
Mesoginella is a genus of sea snails, marine gastropod mollusks in the family Marginellidae, the margin snails.
Prunum is a genus of sea snails, marine gastropod molluscs in the subfamily Pruninae of 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.
Balanetta is a genus of small, often colorful, sea snails, marine gastropod molluscs in the taxonomic family of the margin shells (Marginellidae).
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.
Mirpurina is a genus of sea snails, marine gastropod mollusks in the subfamily Pruninae of the family Marginellidae, the margin snails.