''Agladrillia'' 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 ...
Drilliidae
The Drilliidae are a taxonomic family of small predatory sea snails with high-spired shells. They are classified as marine gastropod mollusks in the superfamily Conoidea.
This family has no subfamilies. It consists of about 30 genera and approx ...
.
Description
A specific characteristic for this genus is that the outer lip is strongly drawn in towards the base.
(Description by
W.P. Woodring) The shell is small and moderately slender, with the
body whorl
The body whorl is part of the morphology (biology), morphology of the gastropod shell, shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk ...
featuring a
varix
A varix (: varices) is an abnormally dilated blood vessel with a tortuous course. Varices usually occur in the venous system, but may also occur in arterial or lymphatic vessels.
Examples of varices include:
* Varicose veins, large tortuous veins ...
some distance from 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 ...
. The
protoconch
A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called " ...
is rather stout, consisting of about two smooth
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
aperture
In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...
is long and narrow, with an anterior canal that is strongly constricted. The siphonal notch is moderately deep and asymmetrical, with a siphonal
fasciole
A fasciole in mollusks refers to a band or ribbon-like structure that is often seen as a flattened, slightly depressed area on the shell, formed by the successive growth lines on the edges of a canal. It is typically found on the surface of the s ...
that is hardly inflated. The base of the outer lip has a relatively deep notch, and the inner lip is detached. The anal sinus is deep and adjoins the suture, with a rounded
apex
The apex is the highest point of something. The word may also refer to:
Arts and media Fictional entities
* Apex (comics)
A-Bomb
Abomination
Absorbing Man
Abraxas
Abyss
Abyss is the name of two characters appearing in Ameri ...
. The parietal wall is heavily callused where it adjoins the suture. The sculpture of the shell consists of narrow axial ribs and spiral threads or grooves. The anal fasciole bears a swelling across which obscure prolongations of the axial ribs extend.
This genus is proposed for small “Drillias” that have a narrow aperture, definitely formed anterior canal, rather deep stromboid notch on the outer lip, and an asymmetrical siphonal notch. The sculpture of Agladrillia s. s. consists of axials and spirals and the anal fasciole is set off by discrepant sculpture.
[ ]
Species
Species within the genus ''Agladrillia'' include:
* ''
Agladrillia anadelgado''
Rolán et al., 2007
* ''
Agladrillia aureola''
Fallon, 2016
* ''
Agladrillia badia''
McLean & Poorman, 1971
* ''
Agladrillia benjamini''
(Bartsch, 1915)
* † ''
Agladrillia callothyra
''Agladrillia callothyra'' is an extinct species of sea snail, a marine gastropod mollusk in the family (biology), family Drilliidae
It is the type species of the genus ''Agladrillia''.
Description
The height of the shell attains 19.5 mm, ...
''
Woodring, 1928
* ''
Agladrillia flucticulus''
McLean & Poorman, 1971
* ''
Agladrillia fuegiensis''
(Smith E. A., 1888)
* ''
Agladrillia gorgonensis''
McLean & Poorman, 1971
* ''
Agladrillia leptalea''
W.P. Woodring, 1928
* ''
Agladrillia macella''
(Melvill, 1923)
* † ''
Agladrillia nakazaense''
MacNeil, 1961
* ''
Agladrillia nitens
''Agladrillia nitens'' is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.Bouchet, P. (2015). Agladrillia nitens. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies ...
''
(Hinds, 1843)
* ''
Agladrillia piscorum''
Kilburn, 1988
* ''
Agladrillia plicatella''
(Dall, 1908)
* ''
Agladrillia pudica
''Agladrillia pudica'' is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
Description
The size of an adult shell varies between 13 mm and 20 mm.
The whorls are short and are characterized by oblique ribs ...
''
(Hinds, 1843)
* ''
Agladrillia rhodochroa''
(Dautzenberg, 1900)
*''
Agladrillia torquata''
Fallon, 2016
* ''
Agladrillia ukuminxa''
Kilburn, 1988
;Species brought into synonymy:
* † ''Agladrillia oyamai''
Shuto, 1965: synonym of †'' Thelecytharella oyamai''
(Shuto, 1965), synonym of ''
Otitoma oyamai''
(Shuto, 1965)
* † ''Agladrillia serra''
Woodring, 1928: synonym of ''
Eumetadrillia serra''
(Woodring, 1928)
References
*
External links
WMSDB - Worldwide Mollusc Species Data Base: family Drilliidae
Drilliidae
Gastropod genera
{{Drilliidae-stub