The white shell is small and oval. Its length measures 1 mm. The whorls of the protoconch are almost completely obliquely immersed in the first of the succeeding turns. The four whorls of the teleoconch are flattened, with subtabulated summits and a deeply sulcated periphery. They are marked by sublamellar, slightly retractive axial ribs, of which 14 occur upon the first and second and 18 upon the penultimate turn. The intercostal spaces are smooth and three times as wide as the ribs. The periphery is deeply and broadly sulcate, bordered on each side by a low spiral cord, crossed by the continuations of the axial ribs. The base of the body whorl is well rounded. It is marked by the axial ribs which continue almost undiminished to the umbilical chink and about twelve spiral lirations. The aperture is oval. The posterior angle is obtuse. The outer lip is thin, showing the external sculpture within. The columella is slender, curved, and slightly revolute. The parietal wall is covered by a thin callus.[4]
Distributionedit
The type species was found in the Pacific Ocean off Mazatlán, Mexico.
^Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064:
^William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909 (described Odostomia (Ividella) orariana)
Carpenter P.P. (1857). Catalogue of the collection of Mazatlan Mollusca in the British Museum collected by Frederick Reigen. London, xvi + 552 pp
External linksedit
To USNM Invertebrate Zoology Mollusca Collection
To World Register of Marine Species
May 07, 2024
egila, lacunata, species, snail, marine, gastropod, mollusk, family, pyramidellidae, pyrams, their, allies, apertural, view, shell, scientific, classification, domain, eukaryota, kingdom, animalia, phylum, mollusca, class, gastropoda, subclass, heterobranchia,. Egila lacunata is a species of sea snail a marine gastropod mollusk in the family Pyramidellidae the pyrams and their allies 2 3 Egila lacunata Apertural view of the shell of Egila lacunata Scientific classification Domain Eukaryota Kingdom Animalia Phylum Mollusca Class Gastropoda Subclass Heterobranchia Family Pyramidellidae Genus Egila Species E lacunata Binomial name Egila lacunata Carpenter 1856 1 Synonyms Odostomia lacunata Carpenter 1857 Odostomia Egila lacunata Carpenter 1856 Parthenia lacunata Carpenter 1856 basionym Pyrgulina lacunata Carpenter 1857 Contents 1 Description 2 Distribution 3 References 4 External linksDescription editThe white shell is small and oval Its length measures 1 mm The whorls of the protoconch are almost completely obliquely immersed in the first of the succeeding turns The four whorls of the teleoconch are flattened with subtabulated summits and a deeply sulcated periphery They are marked by sublamellar slightly retractive axial ribs of which 14 occur upon the first and second and 18 upon the penultimate turn The intercostal spaces are smooth and three times as wide as the ribs The periphery is deeply and broadly sulcate bordered on each side by a low spiral cord crossed by the continuations of the axial ribs The base of the body whorl is well rounded It is marked by the axial ribs which continue almost undiminished to the umbilical chink and about twelve spiral lirations The aperture is oval The posterior angle is obtuse The outer lip is thin showing the external sculpture within The columella is slender curved and slightly revolute The parietal wall is covered by a thin callus 4 Distribution editThe type species was found in the Pacific Ocean off Mazatlan Mexico References edit Carpenter Cat Mazatlan Shells 1856 p 414 Bouchet P 2015 Egila lacunata Carpenter 1857 In MolluscaBase 2015 Accessed through World Register of Marine Species at http www marinespecies org aphia php p taxdetails amp id 730712 on 2015 12 13 Keen M 1971 Sea shells of Tropical West America Marine mollusks from Baja California to Peru 2nd edit Stanford University Press pp 1064 William Healy Dall and Paul Bartsch A Monograph of West American Pyramidellid Mollusks Smithsonian Institution 1909 described Odostomia Ividella orariana Carpenter P P 1857 Catalogue of the collection of Mazatlan Mollusca in the British Museum collected by Frederick Reigen London xvi 552 ppExternal links editTo USNM Invertebrate Zoology Mollusca Collection To World Register of Marine Species Retrieved from https en wikipedia org w index php title Egila lacunata amp oldid 1126008715, wikipedia, wiki, book, books, library,
