Xanthonychoidea
{{Short description|Superfamily of gastropods}}
{{Taxobox
| image = Naturalis Biodiversity Center - RMNH.MOL.301252 - Averellia desidens (Rang, 1834) - Xanthonychidae - Mollusc shell.jpeg
| image_caption = Averellia desidens shell
| regnum = Animalia
| phylum = Mollusca
| classis = Gastropoda
| unranked_superfamilia = clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
| superfamilia = Xanthonychoidea
| superfamilia_authority = Strebel & Pfeffer, 1879Strebel & Pfeffer (1879). Beitrag zur Kenntniss der Fauna mexicanischer Land- und Süsswasser Conchylien, 4: 25.
| synonyms =
}}
Xanthonychoidea is a taxonomic superfamily of air-breathing land snails, land slugs and semi-slugs, terrestrial pulmonate gastropod molluscs in the clade Stylommatophora.
Taxonomy
=2005 taxonomy=
The taxon Xanthonychoidea was not used in the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005.{{Bouchet 2005}} The family Xanthonychidae was placed within the superfamily Helicoidea.
=2012 taxonomy=
Thompson & Naranjo-García (2012) described a new family Echinichidae and placed it to the superfamily Xanthonychoidea.Thompson F. G. & Naranjo-García E. (2012). "Echinichidae, a new family of dart-bearing helicoid slugs from Mexico, with the description of a new genus and three new species (Gastropoda: Pulmonata: Xanthonychoidea)". Archiv für Molluskenkunde 141(2): 197-208. {{doi|10.1127/arch.moll/1869-0963/141/197-208}}. [http://www.schweizerbart.de/resources/downloads/paper_previews/79370.pdf preview].
Families within the Xanthonychoidea include: