''Mitromorpha gracilior'' 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

Mitromorphidae Mitromorphidae is a monophyletic family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet, P. (2011). Mitromorphidae Casey, 1904. In: MolluscaBase (2018). Accessed through: World Register of Marin ...

Description

The length of the shell varies between 4 mm and 5 mm. The decussation not so deep as in ''

Mitromorpha aspera ''Mitromorpha aspera'' is a species of sea snail, a marine gastropod mollusk in the family Mitromorphidae. Description The reddish brown shell is spirally lirate and longitudinally closely costulate, the intersections forming a roughly aspirate ...

'', so that the surface is smoother, the tuberculation smaller. Sometimes the clathration of 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 ...

is only seen on the upper portion, the longitudinal costulae becoming obsolete below. G.W. Tryon (1884) Manual of Conchology, structural and systematic, with illustrations of the species, vol. VI; Philadelphia, Academy of Natural Sciences

Distribution

References

External links

* {{DEFAULTSORT:Mitromorpha Gracilior gracilior Gastropods described in 1884