Rissopsetia Gracilis
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''Rissopsetia gracilis'' is a
species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...
of
sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...
, a marine
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 ...
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 ...
Pyramidellidae 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 micromol ...
, the pyrams and their allies.Rosenberg, G. (2012). ''Pyramidellidae incertae sedis gracilis'' Oliver, 1915. Accessed through:
World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...
at http://www.marinespecies.org/aphia.php?p=taxdetails&id=599067 on 2012-08-26


Taxonomy

Tentatively assigned to ''Rissopsetia'' by Ponder (1974); does not belong to ''Epigrus'' (Rissooidea).


Distribution

This marine species is
endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...
to
New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...
.


References

* Oliver, W. R. B. "The mollusca of the Kermadec Islands." Transactions and Proceedings of the New Zealand Institute. Vol. 47. 1915. * Ponder W. 1974. ''A review of the Australian species assigned to Rissopsis Garrett with a description of a new species of Rissopsetia (Mollusca: Gastropoda)''. Journal of the Malacological Society of Australia, 3: 25-35


External links


World Register of Marine Species

Spencer H.G., Willan R.C., Marshall B.A. & Murray T.J. (2011) ''Checklist of the Recent Mollusca Recorded from the New Zealand Exclusive Economic Zone''
Pyramidellidae Gastropods described in 1915 Gastropods of New Zealand {{Pyramidellidae-stub