Titanoecoidea

Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Chelicerata
Classis: Arachnida
Ordo: Araneae
Subordo: Opisthothelae
Infraordo: Araneomorphae
Taxon: Neocribellatae
Series: Entelegynae
Superfamilia: Titanoecoidea
Familiae (2): Phyxelididae - Titanoecidae

The Titanoecoidea or titanoecoids are a proposed taxon of araneomorph spiders at the superfamily rank. The taxon contains two families of spiders, Phyxelididae and Titanoecidae. Although some phylogenetic studies have shown these two families to form a clade,[1][2] other studies have not, placing Titanoecidae outside the RTA clade while Phyxelididae is placed inside it.[3] A 2011 classification of spider families leaves both Phyxelididae and Titanoecidae outside the RTA clade as "unplaced non-Orbiculariae families".[4] The status of the group remains unclear as of December 2015.
References

Griswold, Charles E.; Coddington, Jonathan A.; Platnick, Norman I. & Forster, Raymond R. (1999), "Towards a Phylogeny of Entelegyne Spiders (Araneae, Araneomorphae, Entelegynae)", Journal of Arachnology, 27 (1): 53–63, JSTOR 3705965, p. 58
Coddington, Jonathan A. (2005), "Phylogeny and classification of spiders" (PDF), in Ubick, D.; Paquin, P.; Cushing, P.E. & Roth, V. (eds.), Spiders of North America: an identification manual, American Arachnological Society, pp. 18–24, retrieved 2015-09-24, p. 20
Nentwig, Wolfgang, ed. (2013), "Appendix : Spider Phylogeny" (PDF), Spider Ecophysiology, Springer, ISBN 978-3-642-33988-2, retrieved 2015-11-03
Dunlop, Jason A. & Penney, David (2011), "Order Araneae Clerck, 1757" (PDF), in Zhang, Z.-Q. (ed.), Animal biodiversity: An outline of higher-level classification and survey of taxonomic richness, Zootaxa, Auckland, New Zealand: Magnolia Press, ISBN 978-1-86977-850-7, retrieved 2015-10-31