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Monotygma
Shell of Monotygma julii (syntype at MNHN, Paris)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subcohort:	Panpulmonata
Superfamily:	Pyramidelloidea
Family:	Amathinidae
Genus:	Monotygma G.B. Sowerby II, 1839
Type species
Monotygma striata Gray, 1847
Synonyms
List Actaeopyramis P. Fischer, 1885 Kleinella (Actaeopyramis) P. Fischer, 1885 Monoptygma Lea, 1833 sensu A. Adams, 1853 Monotigma G.B. Sowerby II, 1839 Pyramidella (Actaeopyramis) P. Fischer, 1885

Monotygma is a genus of sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies. The status of this genus was for a long time confused, but the situation was clarified in a review by van Aartsen (1986).

Life habits

Little is known about the biology of the members of this genus. As is true of most members of the Pyramidellidae sensu lato, they are most likely to be ectoparasites.

Species

The following species are recognised in the genus Monotygma:

• Monotygma acuminata (Gould, 1861)
• Monotygma amoena (A. Adams, 1853)
• Monotygma caelata (A. Adams, 1861)
• Monotygma elata (Koenen, 1882) †
• Monotygma enosima (Clessin, 1902)
• Monotygma eximia (Lischke, 1872)
• Monotygma fulva (A. Adams, 1853)
• Monotygma granulata (A. Adams, 1853)
• † Monotygma ivolasi (Mayer-Eymar 1900)
• Monotygma julii (Saurin, 1959)
• Monotygma lauta (A. Adams, 1853)
• † Monotygma marcusseni (Schnetler, 2001)
• Monotygma metula (A. Adams, 1861)
• Monotygma pareximia (Nomura, 1936)
• Monotygma puncticulata (Gould, 1861)
• Monotygma punctigera (A. Adams, 1861)
• Monotygma sinuata (Gould, 1861)
• Monotygma striata Gray, 1847
• Monotygma suturalis (A. Adams, 1853)
• Monotygma watsoni (Hornung & Mermod, 1927)

Synonyms

• Monotygma casta (A. Adams, 1853): synonym of Leucotina casta (A. Adams, 1853) (superseded combination)
• Monotygma concinna (A. Adams, 1854): synonym of Leucotina casta (A. Adams, 1853) (superseded combination)
• Monotygma gavisa (Melvill, 1896): synonym of Rissopsetia gavisa (Melvill, 1896)
• Monotygma modesta (de Folin, 1870): synonym of Careliopsis modesta (de Folin, 1870)
• Monotygma pura (A. Adams, 1854): synonym of Leucotina casta (A. Adams, 1853) (unaccepted > junior subjective synonym)

References

1. ^ "WoRMS – World Register of Marine Species – Monotygma G. B. Sowerby II, 1839". www.marinespecies.org. Retrieved 6 July 2023.
2. Vaught, K.C. (1989). A classification of the living Mollusca. American Malacologists: Melbourne, FL (USA). ISBN 0-915826-22-4. XII, 195 pp.

External links

• Sowerby, G. B. II. (1839). A Conchological Manual. G. B. Sowerby, London, v, 130 pp., 24 pls
• Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213
• Aartsen, J. J. van (1986). "Nomenclatural notes I. On Actaeopyramis as related to Monoptygma, Monotigma and Monotygma". Bolettino Malacologico 22 (5–8): 182–184.

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