| Eulimastoma didymum | |
|---|---|
 | |
| Shell of Eulimastoma didymum, original illustration from Verrill & Bush (1900). | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Family: | Pyramidellidae |
| Genus: | Eulimastoma |
| Species: | E. didymum |
| Binomial name | |
| Eulimastoma didymum (Verrill & Bush, 1900) | |
| Synonyms [1] | |
| |
Eulimastoma didymum is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. [1] [2]
The shell is minute, white, and subovate, reaching about 1.3 mm in length and approximately 0.7 mm in width. It consists of five teleoconch whorls in addition to a small, slightly projecting and upturned protoconch. The whorls of the spire are strongly flattened and weakly concave medially. [3]
The suture is deeply impressed and weakly canaliculate, bordered by two thickened, rounded spiral cingula, one above and one below the suture. On the body whorl, a distinct spiral groove occurs below the peripheral cingulum and is bordered anteriorly by an additional spiral ridge. The base is short and only slightly produced, with a small spiral rib in the umbilical region. [3]
The aperture is small, broadly ovate, and slightly expanded anteriorly. [3]
The species was originally described by Verrill and Bush (1900) as Odostomia (Cyclodostomia) didyma, based on a single specimen recovered from shell sand. Subsequent taxonomic revisions transferred the species to the genus Eulimastoma, and the original combinations are now treated as unaccepted superseded combinations. [3]
This species occurs in the following locations: [1]