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Umbraculoidea Tylodina perversa Scientific classification Kingdom: Animalia Phylum: Mollusca (unranked): clade Heterobranchia clade Euthyneura clade Euopisthobranchia[1] clade Umbraculida Superfamily: Umbraculoidea Dall, 1889 (1827) Superfamilies See text The superfamily Umbraculoidea are marine gastropod molluscs. These are two families of unusual false limpets, with a thin soft patelliform shell. Contents 1 Taxonomy 1.1 2005 taxonomy 1.2 2010 taxonomy 2 Footnotes 3 External links // Taxonomy A study by Grande et al., published in 2004, concluded that Umbraculoidea was a sister clade to the Cephalaspidea (Acteonoidea excluded).[2] 2005 taxonomy Umbraculoidea has been classified as the only superfamily in clade Umbraculida within the informal group Opisthobranchia in the taxonomy of Bouchet & Rocroi (2005).[3] Family Umbraculidae Family Tylodinidae 2010 taxonomy Jörger et al. (2010)[1] have moved Umbraculoidea to Euopisthobranchia. Footnotes ^ a b Jörger K. M., Stöger I., Kano Y., Fukuda H., Knebelsberger T. & Schrödl M. (2010). "On the origin of Acochlidia and other enigmatic euthyneuran gastropods, with implications for the systematics of Heterobranchia". BMC Evolutionary Biology 10: 323. doi:10.1186/1471-2148-10-323. ^ C. Grande, J. Templado, J.L. Ververa, R. Zardoya (2004). "Phylogenetic relationships among Opisthobranchia (Mollusca, Gastropoda) based on mitochondrial cox 1, tmV, and rmL genes". Molecular Phylogenetics and Evolution 33 (2): 378–388. doi:10.1016/j.ympev.2004.06.008. PMID 15336672.  ^ Bouchet P., Rocroi J.-P., Frýda J., Hausdorf B., Ponder W., Valdés Á. & Warén A. (2005). "Classification and nomenclator of gastropod families". Malacologia: International Journal of Malacology (Hackenheim, Germany: ConchBooks) 47 (1-2): 1–397. ISBN 3925919724. ISSN 0076-2997. http://www.archive.org/details/malacologia47122005inst.  External links http://www.seaslugforum.net