Thyca

Thyca
	Shell of Thyca crystallina
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Eulimidae
Genus:	Thyca; H. Adams & A. Adams, 1854
Type species
	Pileopsis astericola; A. Adams & Reeve, 1850
Synonyms
	Bessomia Berry, 1959; Capulus (Thyca); Granulithyca Habe, 1976; Kiramodulus Kuroda, 1949; Thyca (Bessomia) Berry, 1959 · accepted, alternate representation; Thyca (Kiramodulus) Kuroda, 1949 · accepted, alternate representation; Thyca (Thyca) H. Adams & A. Adams, 1854 · accepted, alternate representation;

Thyca is a genus of small sea snails, marine gastropod mollusks in the family Eulimidae.^[1] These snails are ectoparasites of starfish; they are relatively unmodified, the underside having become a suction disc with a central mouth that draws nourishment from the host's tissues.^[2]

Description

The conical shell is longitudinally grooved, transparent and slightly curved.^[3]

Species within the genus Thyca include:^[1]

^ ^a ^b ^c Bouchet, P. (2012). Thyca H. Adams & A. Adams, 1854. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=196298 on 2012-07-25
^ Combes, Claude (2005). The Art of Being a Parasite. University of Chicago Press. p. 25. ISBN 978-0-226-11438-5.
^ G.W. Tryon (1886) Manual of Conchology v; VIII

Habe T. (1976) Parasitic gastropods from echinoderms of Japan. Bulletin of the National Science Museum [Tokyo], ser. A, 2(3): 157-171. [22 September 1976] page(s): 165
Warén A. (1980). Revision of the genera Thyca, Stilifer, Scalenostoma, Mucronalia and Echineulima (Mollusca, Prosobranchia, Eulimidae). Zoologica Scripta 9: 187-210
Warén A. (1984) A generic revision of the family Eulimidae (Gastropoda, Prosobranchia). Journal of Molluscan Studies suppl. 13: 1-96. page(s): 46