Seguenzia is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae.
This genus was named after Giuseppe Seguenza (1833–1889), the palaeontologist at Messina, Italy.
Description The thin shell has a turbinate or subtrochoid shape. It is translucent, the outer layer very slight, somewhat nacreous in fresh specimens. There is no epidermis. The shell contains spiral carinations. The upper part of the body whorl is deeply and widely grooved. The aperture is irregular and sinuous behind. The columella is twisted and abruptly notched below. It has a small tooth-like process. The base of the shell shows a sinus. It is deeply umbilicated or imperforate. The thin operculum is oval, with a subcentral nucleus and with obsolete, numerous concentric lines.Tryon (1887), Manual of Conchology IX – Solariidae (by William B. Marshall), Ianthinidae, Trichotropidae, Scalariidae, Cerithiidae, Rissoidae, LittorinidaeJ. Gwyn Jeffreys, Preliminary Report of the Biological Results of a Cruise in H.M.S. 'Valorous' to Davis Strait in 1875; Proceedings of the Royal Society of London, Vol. 25, (1876 - 1877), pp. 177-230
Species According to the World Register of Marine Species (WoRMS), the following species with valid name are included within the genus Seguenzia :WoRMS : Seguenzia; accessed : 13 September 2010
Seguenzia antarctica Thiele, 1925 Seguenzia balicasagensis Poppe, Tagaro & Dekker, 2006 Seguenzia beloni Poppe, Tagaro & Dekker, 2006 Seguenzia cervola Dall, 1919 Seguenzia chariessa Marshall, 1991 Seguenzia chelina Marshall, 1983 Seguenzia compta Marshall, 1983 Seguenzia conopia Marshall, 1983 Seguenzia costulifera Schepman, 1909 Seguenzia dabfari Poppe, Tagaro & Dekker, 2006 Seguenzia dautzenbergi Schepman, 1909 † Seguenzia donaldi Ladd, 1982 Seguenzia eidalima Marshall, 1991 Seguenzia elegans Jeffreys, 1885 Seguenzia elegantissima Poppe, Tagaro & Dekker, 2006 Seguenzia emmeles Marshall, 1991 Seguenzia engonia B.A. Marshall, 1991 Seguenzia eritima Verrill, 1884 Seguenzia eutyches Marshall, 1991 Seguenzia fatigans Barnard, 1963 Seguenzia floridana Dall, 1927 Seguenzia formosa Jeffreys, 1876 Seguenzia fulgida Marshall, 1983 Seguenzia giovia Dall, 1919 † Seguenzia glabella B. A. Marshall, 1983 Seguenzia hapala Woodring, 1928 Seguenzia hosyu Habe, 1953 Seguenzia iota Marshall, 1991 Seguenzia keikoae Poppe, Tagaro & Dekker, 2006 Seguenzia levii Marshall, 1991 Seguenzia lineata Watson, 1879 Seguenzia louiseae A.H. Clarke, 1961 Seguenzia macleani Geiger, 2017 Seguenzia matara Marshall, 1988 Seguenzia metivieri Marshall, 1991 Seguenzia mirabilis Okutani, 1964 Seguenzia monocingulata Seguenza, 1876 Seguenzia nipponica Okutani, 1964 Seguenzia nitida Verrill, 1884 Seguenzia occidentalis Dall, 1908 Seguenzia orientalis Thiele, 1925 Seguenzia platamodes Marshall, 1991 Seguenzia praeceps Marshall, 1991 † Seguenzia prisca B. A. Marshall, 1983 † Seguenzia propheta Lozouet, 1999 Seguenzia richeri Marshall, 1991 † Seguenzia serrata B. A. Marshall, 1983 Seguenzia soyoae (Okutani, 1964) † Seguenzia statiana Sosso, Bertolaso & Dell'Angelo, 2020 Seguenzia stegastris Marshall, 1991 Seguenzia stephanica Dall, 1908 Seguenzia sumatrensis Thiele, 1925 Seguenzia textilis Marshall, 1983 Seguenzia transenna Marshall, 1983 Seguenzia triteia Salvador, Cavallari & Simone, 2014 Seguenzia trochiformis Poppe, Tagaro & Dekker, 2006 Seguenzia wareni Marshall, 1991
Species brought into synonymy Seguenzia caliana Dall, 1919: synonym of Seguenzia stephanica Dall, 1908 Seguenzia carinata Jeffreys, 1876 synonym of Carenzia carinata (Jeffreys, 1877) Seguenzia certoma Dall, 1919: synonym of Seguenzia stephanica Dall, 1908 Seguenzia cazioti Dautzenberg, 1925: synonym of Quinnia cazioti (Dautzenberg, 1925) Seguenzia ionica Watson, 1878 synonym of Quinnia ionica (Watson, 1878) Seguenzia laxa Jeffreys, 1885: synonym of Haloceras laxa (Jeffreys, 1885) Seguenzia megaloconcha Rokop, 1972: synonym of Seguenzia cervola Dall, 1919 Seguenzia melvillii Schepman, 1909: synonym of Carenzia melvillii (Schepman, 1909) Seguenzia polita Verco, 1906: synonym of Quinnia polita (Verco, 1906) Seguenzia quinni J. H. McLean, 1985: synonym of Seguenzia giovia Dall, 1919 Seguenzia reticulata (Philippi, 1844): synonym of Ancistrobasis reticulata (Philippi, 1844) Seguenzia rushi Dall, 1927: synonym of Quinnia rushi (, 1927) Seguenzia siberutensis Thiele, 1925: synonym of Halystina siberutensis (Thiele, 1925) Seguenzia simplex Barnard, 1963: synonym of Halystina simplex (Barnard, 1963) Seguenzia sykesi Schepman, 1909: synonym of Quinnia sykesi (Schepman, 1909) Seguenzia tricarinata Jeffreys, 1885: synonym of Haloceras tricarinata (Jeffreys, 1885)
References
Quinn J.F. (1983). A revision of the Seguenziacea Verrill, 1884 (Gastropoda : Prosobranchia). I. Summary and evaluation of the superfamily, Proceedings of the Biological Society of Washington, 96(4): pp. 725–757
External links
Jeffreys, J. G. (1876). Preliminary report of the biological results of a cruise in H.M.S. Valorous to Davis Straits in 1875. Proceedings of the Royal Society of London. 25: 177-237. Marshall, B. A. (1983). Recent and Tertiary Seguenziidae (Mollusca: Gastropoda) from the New Zealand region. New Zealand Journal of Zoology. 10: 235-262. Harris, G. F. (1897). Catalogue of Tertiary Mollusca in the Department of Geology, British Museum (Natural History). Part I. The Australasian Tertiary Mollusca. London: British Museum (Natural History). xxvi + 406 pp., 6 pls.