''Tenaturris epomis is a species of
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 ...
, a marine
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 in the
family Mangeliidae.
[Rosenberg, G. (2010). Tenaturris epomis. In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=533481 on 2018-01-28]
Description
The length of the shell attains 6.3 mm, its diameter 2 mm.
(Original description) The minute, slender shell is white. The small, smooth
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 ...
consists of about one
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).
Whorls in nature
File:Photograph and axial plane floral ...
, and three subsequent whorls. The suture is distinct, not appressed. The fasciole in front of it flattish, the anterior margin of the fasciole forming a more or less angular shoulder to the whorl. The axial
sculpture consists of very fine incremental lines and at and near the shoulder of feeble fine flexuous wrinkles, stronger on the
spire. The spiral sculpture consists of very fine close striae over the whole surface except a few threads on the
siphonal canal
The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water is ...
. The
body whorl
The body whorl is part of the morphology of the 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.
In gastropods
In gastropods, the b ...
equals about two-thirds the whole length. The
aperture is narrow. The siphonal canal is hardly differentiated. The outer
lip (immature?) is thin and sharp. The
anal sulcus The anal sulcus, also called the anal sinus or anal canal, in Gastropods is a notch, a shelly tube at the top of the aperture
In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and fo ...
is obscure. The
columella is straight, attenuated in front, its axis impervious.
Distribution
This species occurs in the Atlantic Ocean between
Georgia and
Florida, USA.
References
External links
*
{{DEFAULTSORT:Tenaturris Epomis
epomis
''Epomis'' is a genus of ground beetles (Carabidae). The larvae of this genus are notable for being obligate role-reversal predators. Amphibians such as frogs are normally predators of beetles; however, ''Epomis'' larvae feed exclusively on amp ...
Gastropods described in 1927