''Dillwynella'' 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
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 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 ...
Skeneidae
The Skeneidae are a speciose family of minute to small marine gastropod molluscs in the superfamily Trochoidea.Bouchet, P.; Gofas, S. (2013). Skeneidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.ph ...
.
The genus name of ''Dillwynella'' is in honour of
Lewis Weston Dillwyn
Lewis Weston Dillwyn, FRS (21 August 1778 – 31 August 1855) was a British porcelain manufacturer, naturalist and Whig Member of Parliament (MP).
Biography
He was born in Walthamstow, Essex, the eldest son of William Dillwyn and Sarah Dillw ...
(1778 – 1855), who was a British porcelain manufacturer, naturalist and Whig Member of Parliament (MP).
Description
The minute, depressed, porcellanous
shell
Shell may refer to:
Architecture and design
* Shell (structure), a thin structure
** Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses
Science Biology
* Seashell, a hard outer layer of a marine ani ...
has a thin horny
operculum. It consists of comparatively few
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. The shell is imperforate, but with a depression bounded by a riblet in the umbilical rib outside of the
columella
Lucius Junius Moderatus Columella (, Arabic: ) was a prominent Roman writer on agriculture in the Roman Empire.
His in twelve volumes has been completely preserved and forms an important source on Roman agriculture and ancient Roman cuisin ...
. The few whorls have a thin fugacious epidermis. The outer
lip
The lips are a horizontal pair of soft appendages attached to the jaws and are the most visible part of the mouth of many animals, including humans. Mammal lips are soft, movable and serve to facilitate the ingestion of food (e.g. sucklin ...
is thin . The
columella
Lucius Junius Moderatus Columella (, Arabic: ) was a prominent Roman writer on agriculture in the Roman Empire.
His in twelve volumes has been completely preserved and forms an important source on Roman agriculture and ancient Roman cuisin ...
has no teeth, projections, or folds, passing smoothly into the anterior margin.
Species
Species within the genus ''Dillwynella'' include:
* † ''
Dillwynella aulacophora''
Cossmann, 1913 [Cossmann (1915), Révision des scaphopodes, gastropodes et céphalopodes du montien de Belgique; Mémoires du Musée Royal d'Histroire Naturelle de Belgique 1913, p. 36]
* ''
Dillwynella fallax''
Hasegawa, 1997
* ''
Dillwynella haptricola''
B.A. Marshall, 1988
* † ''
Dillwynella houzeaui''
Cossmann, 1913
* ''
Dillwynella ingens''
B.A. Marshall, 1988
* ''
Dillwynella lignicola''
B.A. Marshall, 1988
* ''
Dillwynella modesta''
(Dall, 1889)
* ''
Dillwynella planorbis''
Hasegawa, 1997
* ''
Dillwynella sheisinmaruae''
Hasegawa, 1997
* † ''
Dillwynella texana''
G. Harris, 1895
* ''
Dillwynella vitrea''
Hasegawa, 1997
* ''
Dillwynella voightae''
Kunze, 2011
References
* Kunze T. (2011) ''Dillwynella voightae new species, a new skeneimorph gastropod (Turbinidae) from the western Atlantic and a new record of Dillwynella modesta (Dall, 1889)''. The Nautilus 125(1): 36-40.
{{Taxonbar, from=Q5276969
Skeneidae