''Powellisetia'' 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 minute

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 ...

s, 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 ...

s or

micromollusk A micromollusc is a shelled mollusc which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine molluscs, although in addition, numerous species of land snails and freshwater molluscs also ...

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 ...

Rissoidae Rissoidae is a large family of sea snails. Members of the Rissoidae are very small in size and possess an operculum. Distribution and habitat Rissoidae are found worldwide. They live on sandy or gravel bottoms among algae or marine plants. Th ...

Species

Species within the genus ''Powellisetia'' include: * '' Powellisetia australis'' (Watson, 1886) * ''

Powellisetia bilirata ''Powellisetia bilirata'' is a species of marine gastropod mollusc in the family Rissoidae. First described by Winston Ponder in 1965, it is endemic to the waters of New Zealand. Description ''Powellisetia bilirata'' has a minute shell, wit ...

'' Ponder, 1965 * '' Powellisetia comes'' (

Finlay Finlay is a masculine given name, and also a surname. The given name is represented in Scottish Gaelic as Fionnlagh. Given name Finlay *Finlay Calder, Scottish rugby player * Finlay Christie (comedian), British comedian * Finlay Christie, Scottis ...

, 1926)† * '' Powellisetia crassilabrum'' (Powell, 1940) * ''

Powellisetia deserta ''Powellisetia deserta'' is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae. Distribution Description The maximum recorded shell Shell may refer to: Architecture and design * Shell (stru ...

'' (Smith, 1907) * ''

Powellisetia fallax ''Powellisetia'' is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae. Species Species within the genus ''Powellisetia'' include: * '' Powellisetia australis'' (Watson, 1886) * '' Powellisetia bil ...

'' Kay, 1979 * ''

Powellisetia gradata ''Powellisetia'' is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae. Species Species within the genus ''Powellisetia'' include: * '' Powellisetia australis'' (Watson, 1886) * '' Powellisetia bil ...

'' (Suter, 1908) * ''

Powellisetia helena ''Powellisetia'' is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae. Species Species within the genus ''Powellisetia'' include: * '' Powellisetia australis'' (Watson, 1886) * '' Powellisetia bil ...

'' (Turton, 1932) * ''

Powellisetia inornata ''Powellisetia'' is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae. Species Species within the genus ''Powellisetia'' include: * '' Powellisetia australis'' (Watson, 1886) * '' Powellisetia bil ...

'' (Strebel, 1908) * ''

Powellisetia lineata ''Powellisetia'' is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae. Species Species within the genus ''Powellisetia'' include: * '' Powellisetia australis'' (Watson, 1886) * ''Powellisetia bili ...

'' (E. C. Smith, 1962) * ''

Powellisetia microlirata ''Powellisetia'' is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae. Species Species within the genus ''Powellisetia'' include: * '' Powellisetia australis'' (Watson, 1886) * '' Powellisetia bil ...

'' Ponder & Worsfold, 1994 * ''

Powellisetia microstriata ''Powellisetia'' is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae. Species Species within the genus ''Powellisetia'' include: * '' Powellisetia australis'' (Watson, 1886) * ''Powellisetia bili ...

'' (Murdoch, 1905) * ''

Powellisetia paroeca ''Powellisetia paroeca'' is an extinct species of marine gastropod mollusc in the family Rissoidae. First described by Harold John Finlay in 1924, it is known to have lived in New Zealand during the early Miocene. Taxonomy The species was id ...

'' (

, 1924)† * ''

Powellisetia pelseneeri ''Powellisetia pelseneeri'' is a species of small sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae. They are detritivores Detritivores (also known as detrivores, detritophages, detritus feeders or detritus eaters ...

'' (Thiele, 1912) * '' Powellisetia philomelae'' (Watson, 1886) * '' Powellisetia ponderi'' Numanami, 1996 * '' Powellisetia porcellana'' (Suter, 1908) * '' Powellisetia porcellanoides'' (Powell, 1937) * '' Powellisetia principis'' (Watson, 1886) * '' Powellisetia retusa'' (Powell, 1927) * '' Powellisetia simillima'' (May, 1915) * '' Powellisetia subgradata'' (Powell, 1937) * '' Powellisetia subtenuis'' (Powell, 1937) * '' Powellisetia tenuisculpta'' (Powell, 1933) * '' Powellisetia unicarinata'' (Powell, 1930)

References

page(s): 61-62 Ponder W. F. (1985). ''A review of the Genera of the Rissoidae (Mollusca: Mesogastropoda: Rissoacea).'' Records of the Australian Museum supplement 4: 1-221
* Spencer, H.; Marshall. B. (2009). ''All Mollusca except Opisthobranchia''. In: Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp Rissoidae Taxa named by Winston Ponder {{Rissoidae-stub