Dillwynella Explained

Dillwynella is a genus of sea snails, marine gastropod mollusks in the family Skeneidae.

The genus name of Dillwynella is in honour of Lewis Weston Dillwyn (1778 – 1855), who was a British porcelain manufacturer, naturalist and Whig Member of Parliament (MP).

Description

The minute, depressed, porcellanous shell has a thin horny operculum. It consists of comparatively few whorls. The shell is imperforate, but with a depression bounded by a riblet in the umbilical rib outside of the columella. The few whorls have a thin fugacious epidermis. The outer lip is thin . The columella has no teeth, projections, or folds, passing smoothly into the anterior margin.^[1]

Species

Species within the genus Dillwynella include:

• † Dillwynella aulacophora Cossmann, 1913 ^[2]
• Dillwynella fallax Hasegawa, 1997
• Dillwynella haptricola B.A. Marshall, 1988
• † Dillwynella houzeaui Cossmann, 1913 ^[2]
• Dillwynella ingens B.A. Marshall, 1988
• Dillwynella lignicola B.A. Marshall, 1988
• Dillwynella modesta (Dall, 1889)
• Dillwynella planorbis Hasegawa, 1997
• Dillwynella sheisinmaruae Hasegawa, 1997
• † Dillwynella texana G. Harris, 1895 ^[3]
• Dillwynella vitrea Hasegawa, 1997
• Dillwynella voightae Kunze, 2011

References

• Kunze T. (2011) Dillwynella voightae new species, a new skeneimorph gastropod (Turbinidae) from the western Atlantic and a new record of Dillwynella modesta (Dall, 1889). The Nautilus 125(1): 36-40.

Notes and References

1. https://archive.org/details/bulletinofmuseum18harv Dall W. H. 1889. Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U.S. Coast Survey Steamer "Blake", Lieut.-Commander C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. XXIX. Report on the Mollusca. Part 2, Gastropoda and Scaphopoda. Bulletin of the Museum of Comparative Zoölogy at Harvard College 18: 1-492, pls. 10-40
2. Cossmann (1915), Révision des scaphopodes, gastropodes et céphalopodes du montien de Belgique; Mémoires du Musée Royal d'Histroire Naturelle de Belgique 1913, p. 36
3. https://www.jstor.org/stable/4061943?seq=40&Search=yes&searchText=Dillwynella&list=show&searchUri=%2Faction%2FdoBasicSearch%3FQuery%3DDillwynella%26acc%3Don%26wc%3Don%26fc%3Doff&prevSearch=&item=3&ttl=4&returnArticleService=showFullText&resultsServiceName=null G. Harris, New and Otherwise Interesting Tertiary Mollusca from Texas; Proceedings of the Academy of Natural Sciences of Philadelphia, Vol. 47, (1895), pp. 45-88