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・ Seguenzia costulifera
・ Seguenzia dabfari
・ Seguenzia dautzenbergi
・ Seguenzia donaldi
・ Seguenzia eidalima
・ Seguenzia elegans
・ Seguenzia elegantissima
・ Seguenzia emmeles
・ Seguenzia engonia
・ Seguenzia eritima
・ Seguenzia eutyches
・ Seguenzia fatigans
・ Seguenzia floridana
・ Seguenzia formosa
・ Seguenzia fulgida
Seguenzia giovia
・ Seguenzia hapala
・ Seguenzia hosyu
・ Seguenzia iota
・ Seguenzia keikoae
・ Seguenzia levii
・ Seguenzia lineata
・ Seguenzia louiseae
・ Seguenzia matara
・ Seguenzia megaloconcha
・ Seguenzia metivieri
・ Seguenzia mirabilis
・ Seguenzia monocingulata
・ Seguenzia nipponica
・ Seguenzia nitida


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Seguenzia giovia : ウィキペディア英語版
Seguenzia giovia

''Seguenzia giovia'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.〔Rosenberg, G. (2013). ''Seguenzia giovia'' Dall, 1919. Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492450 on 2013-06-10〕〔Abbott R. T. (1974). American Seashells. The marine mollusca of the Atlantic and Pacific coast of North America. II edit. Van Nostrand, New York 663 p. + 24 pl:〕
==Description==
(Original description by W.H. Dall) The shell is higher (6 mm) than broad (5 mm). The shell resembles ''Seguenzia certoma'' Dall, 1919, but it is larger and differently sculptured. The minute nucleus is smooth, subglobular followed by seven sculptured whorls. The obscure suture is laid on the peripheral keel. The spiral sculpture shows four narrow prominent keels, of which the second is peripheral, the third marginates the base, and the fourth is on the base, the interspaces much wider and becoming narrower anteriorly. There are also seven closer even low threads on the base with subequal interspaces. The posterior wide interspaces are sculptured with close-set fine spiral thread. The axial sculpture shows numerous equal and equally spaced arcuate threads, with wide interspaces, which on the upper whorls bead the posterior carina, but later are chiefly visible in the interspaces and extend over the whole shell. The sulcus at the aperture next the body is shallow. The outer lip beyond it is moderately
produced and crenulate by the sculpture. The thin and arcuate columella has a very small notch at its base. There is a deep twisted perforate umbilicus and a thin layer of enamel on the body.〔(Dall (1919) Descriptions of new species of Mollusca from the North Pacific Ocean; Proceeding of the U.S. National Museum, vol. 56 (1920) )〕

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