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''Rivomarginella'' is a
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
freshwater snail Freshwater snails are gastropod mollusks that live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs t ...
s,
gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...
mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000  extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...
s in the
family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
Marginellidae Marginellidae, or the margin shells, are a taxonomic family of small, often colorful, sea snails, marine gastropod molluscs in the clade Neogastropoda. Taxonomy The higher classification of the family Marginellidae has long been in a state o ...
, the margin snails. ''Rivomarginella'' is the only freshwater genus in the marine family Marginellidae.


Distribution

They are native to Southeast Asia.


Species

There are two species in the genus ''Rivomarginella'': * '' Rivomarginella electrum'' (Reeve, 1865) * '' Rivomarginella morrisoni'' Brandt, 1968 - type species of the genus ''Rivomarginella''Bouchet, P.; Gofas, S. (2015). ''Rivomarginella''. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=465265 on 2016-01-02


Ecology

Predators of ''Rivomarginella'' snails include
bagrid catfish The Bagridae are a family of catfish that are native to Africa ('' Bagrus'') and Asia (all other genera) from Japan to Borneo. It includes about 245 species. These fish are commonly known as naked catfishes or bagrid catfishes. Many large bagrid ...
false black lancer '' Bagrichthys macropterus''.Tan H. H. & Ng H. H. (2000). "The catfishes (Teleostei: Siluriformes) of Sumatra". ''
Journal of Natural History The ''Journal of Natural History'' is a scientific journal published by Taylor & Francis focusing on entomology and zoology. The journal was established in 1841 under the name ''Annals and Magazine of Natural History'' (''Ann. Mag. Nat. Hist.'') an ...
'' 34(2): 267-303. .


References

* Brandt R.A.M. (1974). ''The non-marine aquatic Mollusca of Thailand''. Archiv für Molluskenkunde. 105: i-iv, 1-423. Marginellidae {{Marginellidae-stub