The Nautilus Log
Emarginula concinna

Emarginula concinna

NameEmarginula concinna
Scientific NameEmarginula concinna
Common NameNone found
FamilyFissurellidae
GenusEmarginula
Speciesconcinna
Geographic DistributionIndo-Pacific, including regions such as Japan and the Philippines.
Habitatintertidal
Shell Shapeconical
Average Size (mm)10
Identifying FeaturesLimpet-like, conical shell with a prominent cancellate sculpture (radial ribs crossed by concentric growth lines), crenulated margin, and an anteriorly recurved apex. The presence of an anterior slit is a key generic feature.
Raritycommon
Author CitationA. Adams, 1852

Description

The image displays a living specimen of Emarginula concinna, a species of slit limpet, attached to a reddish-pink hard substrate, likely rock or coral. The shell is conical and limpet-shaped, exhibiting a uniformly off-white to cream coloration. Its surface is characterized by a prominent cancellate sculpture, formed by numerous radial ribs intersecting with concentric growth lines, which gives the shell a textured, grid-like appearance, particularly towards the margin. The apex is slightly anterior and recurved. The shell's margin is distinctly crenulated, reflecting the underlying radial ribbing. The presence of an anterior slit, characteristic of the genus Emarginula, is implied by the overall morphology, though not perfectly clear from this dorsal view.

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