''Evalina'' is a small

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of sea snails, pyramidellid gastropod

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 es ...

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 ...

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 micr ...

. 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 togethe ...

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 ''Sensu'' is a Latin word meaning "in the sense of". It is used in a number of fields including biology, geology, linguistics, semiotics, and law. Commonly it refers to how strictly or loosely an expression is used in describing any particular c ...

'', 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 ha ...

Species

Species within the genus ''Evalina'' include: * ''

Evalina americana ''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 ...

'' Dall & Bartsch, 1904 - type species, as ''Odostomia'' (''Evalina'') ''americana'' * ''

Evalina nishiana ''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 ...

'' (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 ''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 ...

'' (Bartsch, 1909) * ...

References

Pyramidellidae {{Pyramidellidae-stub