Guttula

Guttula
	Guttula sibogae
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Family:	Seguenziidae
Subfamily:	Guttulinae
Genus:	Guttula; Schepman, 1908
Type species
	Guttula sibogae; Schepman, 1908

Guttula is a genus of sea snails, marine gastropod molluscs in the family Seguenziidae.^[2]

Description

(Original description by Schepman) The small, shell has a conoidal shape. It is smooth, pearly, and perforate. The aperture is rounded, with an angle at the base. The operculum contains few whorls.

It is chiefly on account of the peculiar radula, that Schepman had located the then only species in a new genus.^[3]

Quin (1998) adds the following specifications.

Shell: The shell has no peripheral carina, no axial riblets, no midwhorl angulation, no spiral lirae, no basal, posterior or anterolateral sinus, no columellar sinus. The aperture has a circular shape. The columellar tooth is absent. There is no umbilical septum. The shell has punctate microsculpture.

Radula: the rachidian tooth is broader than high and has the lateral wings prominent. The lateral tooth cusp is broad to absent.^[4]

Species

Species within the genus Guttula include:

Guttula blanda Barnard, 1963
Guttula galatheae Knudsen, 1964^[5]
Guttula sibogae Schepman, 1908

References

^ Schepman 1908, Siboga-Exp., 49 (1a), no. 39, 61.
^ Guttula. Retrieved through: World Register of Marine Species on 21 June 2012.
^ Schepman 1908-1913, The Prosobranchia of the Siboga Expedition; Leyden,E. J. Brill,1908-13
^ James F. Quinn Jr., (1991), Systematic Position of Basilissopsis and Guttula, and a Discussion of the Phylogeny of the Seguenzioidea (Gastropoda: Prosobranchia), Bulletin of Marine Science, Volume 49, Numbers 1-2, September 1991 , pp. 575-598(24)^{[permanent dead link]}
^ Guttula galatheae Knudsen, 1964. Retrieved through: World Register of Marine Species on 18 April 2010.

External links

Quinn J. F. (1983). A revision of the Seguenziacea Verrill, 1884. I. Summary and evaluation of the superfamily. Proceedings of the Biological Society of Washington 96 (4): 725-757

[1] Schepman 1908, Siboga-Exp., 49 (1a), no. 39, 61.

[WoRMS-2] Guttula. Retrieved through: World Register of Marine Species on 21 June 2012.

[3] Schepman 1908-1913, The Prosobranchia of the Siboga Expedition; Leyden,E. J. Brill,1908-13

[4] James F. Quinn Jr., (1991), Systematic Position of Basilissopsis and Guttula, and a Discussion of the Phylogeny of the Seguenzioidea (Gastropoda: Prosobranchia), Bulletin of Marine Science, Volume 49, Numbers 1-2, September 1991 , pp. 575-598(24)^{[permanent dead link]}

[5] Guttula galatheae Knudsen, 1964. Retrieved through: World Register of Marine Species on 18 April 2010.

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