Seguenzia monocingulata

Seguenzia monocingulata is an extinct species of sea snail, a marine gastropod mollusk in the family Seguenziidae.[2] It resembles Seguenzia formosa and has been regarded as a synonym of that (extant) species. However the two species are distinct, based on shell morphology.[3]

Seguenzia monocingulata
Drawing with two views of a shell of Seguenzia monocingulata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Family: Seguenziidae
Genus: Seguenzia
Species:
†S. monocingulata
Binomial name
†Seguenzia monocingulata
Seguenza, 1876 [1]

Description

The height of the shell attains 4 mm. The white, imperforate shell has a high conoid shape. The whorls have revolving ribs, of which the last has about four distant prominent ones, besides minor striae on the base.[4]

Distribution

This species was originally described by Seguenza from Pliocene fossils found near Trapani, Sicily.[5] It is common in deep-sea deposits from southern Italy.[3]

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References
  1. Seguenza, Boll. Comitato Geologico, vii, 188, May, 1876,
  2. Seguenzia monocingulata Seguenza, 1876. Retrieved through: World Register of Marine Species on 8 January 2019.
  3. Di Geronimo, I.; La Perna, R. (1997). "Pleistocene Bathyal Molluscan Assemblages from Southern Italy". Rivista Italiana di Paleontologia e Stratigrafia. 103 (3): 398.
  4. Tryon (1887), Manual of Conchology IX – Solariidae (by William B. Marshall), Ianthinidae, Trichotropidae, Scalariidae, Cerithiidae, Rissoidae, Littorinidae
  5. Dautzenberg, Ph.; Fischer, H. (1906). Mollusques provenant des dragages effectués à l'ouest de l'Afrique pendant les campagnes scientifiques de S.A.S. le Prince de Monaco. Résultats des Campagnes Scientifiques Accomplies sur son Yacht par Albert Ier Prince Souverain de Monaco, XXXII. Imprimerie de Monaco: Monaco. 125 p., 5 plates
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