''Numaegilina'' is a small
genus of very small
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 ...
mollusks or
micromollusk
A micromollusk is a shelled mollusk which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine mollusks, although in addition, numerous species of land snails and freshwater mollusks also ...
s. This genus is currently placed in the subfamily
Chrysallidinae
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 ...
of the
family Odostomiidae
Odostomiinae, ''Odostomia'' snails and their allies, is a taxonomic subfamily of minute parasitic sea snails. These are marine heterobranch gastropod mollusks, or micromollusks, in the family Pyramidellidae.
Taxonomy
The subfamily Odostomiinae h ...
. It was originally described as a subgenus of ''Chrysallida" but was raised to generic status by Schander et al. (1999).A junior synonym is ''Paregila'' Laseron, 1951.
Shell description
In the original description (Nomura, 1938) it is stated that the difference between this genus and "Egilina" and "Egila" is that the axial riblets are not fused at the upper and lower ends and that the sutures are not channeled. There are spiral threads seen in the intercostae whereas the intercosta in ''Egilina'' are smooth.
Life history
Nothing is known about the biology of the members of this genus. As is true of most members of the
Pyramidellidae ''
sensu lato'', they are most likely to be
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 ...
s.
Species
Species within the genus ''Numaegilina'' include:
* ''
Numaegilina gloria''
(Nomura, 1938) (Type species) (as ''Chrysallida (Numaegilina) gloria'')
* ''
Numaegilina claudoni''
(Dautzenberg & Fischer, 1906)
* ''
Numaegilina henni''
* ''
Numaegilina khmeriana''
Saurin, 1961
* ''
Numaegilina obliquissima''
Saurin, 1959
* ''
Numaegilina perspectiva''
* ''
Numaegilina ventricosa''
(Saurin, 1958)
References
Ronald G. Noseworthy, Na-Rae Lim, and Kwang-Sik Choi, A Catalogue of the Mollusks of Jeju Island, South Korea; Korean Journal of Malacology, Vol. 23(1): 65-104, June 30, 2007*
External links
Pyramidellidae
{{Pyramidellidae-stub