''Evalina'' is a small

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

sea snail Sea snail is a common name for 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 ...

s, pyramidellid

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s in the tribe

Chrysallidini Chrysallidinae is a taxonomic group of very small sea snails, marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. Taxonomy Chrysallidinae has been one of eleven recognized subfamilies of the gastropod family Pyr ...

within the family

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 genus has both

Recent The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together ...

and

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

members.

Life habits

Little is known about the biology of the members of this genus. As is true of most members of the

'' sensu lato'', they are

ectoparasite Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson has ...

Species

Species within the genus ''Evalina'' include: * '' Evalina americana'' Dall & Bartsch, 1904 - type species, as ''Odostomia'' (''Evalina'') ''americana'' * '' Evalina nishiana'' (Yokoyama, 1927) * ''

Evalina peasei ''Evalina'' is a small genus of sea snails, pyramidellid gastropod mollusks in the tribe Chrysallidini within the family Pyramidellidae. The genus has both Recent and fossil members. Life habits Little is known about the biology of the members ...

'' (Dautzenberg & Bouge, 1933) * ''

Evalina waikikiensis ''Evalina'' is a small genus of sea snails, pyramidellid gastropod mollusks in the tribe Chrysallidini within the family Pyramidellidae. The genus has both Recent and fossil members. Life habits Little is known about the biology of the members ...

'' (Pilsbry, 1918) * '' Evalina winkleyi'' (Bartsch, 1909) * ...

References

Pyramidellidae {{Pyramidellidae-stub