''Folinella'' 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 snails Sea snails are slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visibl ...

, pyramidellid

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 ...

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 ...

within the tribe Chrysallidini.Gofas, S. (2011). Folinella. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=195918 on 2012-01-04

Description

The

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). In nature File:Photograph and axial plane floral diagra ...

s of the

teleoconch The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium ...

are sculptured similarly throughout. The axial ribs are rounded. The spiral markings consist of two tumid ridges, one at the periphery and one at the summit of the whorls; with many striations on the base. William Healy Dall and Paul Bartsch, "A Monograph of West American Pyramidellid Mollusks", Smithsonian Institution, p. 13:1909
/ref>

Species

* '' Folinella acupicta'' Peñas & Rolán, 2017 * '' Folinella anguliferens'' (de Folin, 1873) * '' Folinella binilicia'' Peñas & Rolán, 2017 * '' Folinella excavata'' (Phillippi, 1836) * '' Folinella ghisottii'' van Aartsen, 1984 * '' Folinella holthuisi'' van Aartsen, Gittenberger E. & Goud, 1998 * '' Folinella moolenbeeki'' van Aartsen, Gittenberger E. & Goud, 1998 ;Species brought into synonymy: * ''Folinella maoria'' (Powell, 1940): synonym of ''

Ividella maoria ''Ividella maoria'' is a species of marine gastropod mollusc in the family Pyramidellidae. It was first described by Baden Powell in 1940. It is endemic to the waters of New Zealand. The mollusc was the first of its species to be identified in ...

'' Powell, 1940 * ''Folinella navisa'' (Dall & Bartsch, 1907): synonym of ''

Chrysallida navisa ''Ividella navisa'' is a species of sea snail, a marine (ocean), marine gastropod mollusk in the family (biology), family Pyramidellidae, the pyrams and their allies. The species is one of a number within the genus ''Chrysallida''.MolluscaBase ed ...

'' (Dall & Bartsch, 1907) * ''Folinella quinquecincta'' (Carpenter, 1856): synonym of '' Ividella quinquecincta'' (Carpenter, 1857) * ''Folinella robertsoni'' (Altena, 1975): synonym of '' Iolaea robertsoni'' (van Regteren Altena, 1975) * † ''Folinella spinosula'' Micali, 1992: synonym of † '' Mulderia spinosula'' (Micali, 1992) (original combination)

References

* Pimenta, Alexandre D., f. N. Santos, and Ricardo S. Absalão. 2008. Review of the genera Ividia, Folinella, Menestho, Pseudoscilla, Tryptichus and Peristichia (Gastropoda, Pyramidellidae) from Brazil, with descriptions of four new species. The Veliger 50: 171-184. * Peñas A. & Rolán E. (2017). Deep water Pyramidelloidea from the central and South Pacific. The tribe Chrysallidini. ECIMAT (Estación de Ciencias Mariñas de Toralla), Universidade de Vigo. 412 pp.

External links

To WoRMS

Dall W.H. & Bartsch P. (1904). Synopsis of the genera, subgenera and sections of the family Pyramidellidae. Proceedings of the Biological Society of Washington. 17: 1-16
Gastropod genera Pyramidellidae {{Pyramidellidae-stub