Eresoidea

The Eresoidea or eresoids are a group of araneomorph spiders that have been treated as a superfamily. As usually circumscribed, the group contains three families: Eresidae, Hersiliidae and Oecobiidae.[1] Studies and reviews based on morphology suggested the monophyly of the group; more recent gene-based studies have found the Eresidae and Oecobiidae to fall into different clades, placing doubt on the acceptability of the taxon. Some researchers have grouped Hersiliidae and Oecobiidae into the separate superfamily Oecobioidea, a conclusion supported in a 2017 study, which does not support Eresoidea.

Male Eresus kollari

Phylogeny

Some largely morphology-based phylogenetic studies that included the three families assigned to the Eresoidea supported their monophyly, with the internal structure of the clade being as shown below.[2][3]

	Eresidae       Oecobiidae     Hersiliidae

Eresoidea was placed as basal in the Entelegynae, with its precise position relative to the Palpimanoidea, also basal, varying. In 2015, Jonathan A. Coddington summarized this as a trichotomy:[2]

Entelegynae	Eresoidea     Palpimanoidea     "canoe tapetum clade" holding the remaining entelegynes

Another summary phylogeny groups Eresoidea and Palpimanoidea into a single clade, sister to the "canoe tapetum clade" holding the remaining entelegynes.[3]

Other studies, particularly those using genetic data, have presented different views. A 2010 study of the phylogeny of entelegyne spiders separated Eresidae from Oecobiidae and Hersiliidae, placing the latter two in a superfamily Oecobioidea.[4] In 2014, a cladogram was presented in which Eresoidea is similarly paraphyletic (shading marks Eresoidea families):[5]

Entelegynae	Palpimanoidea       Eresidae         RTA clade       Hersiliidae     Oecobiidae         Orbiculariae

A 2014 study based on a larger portion of the spider genome than any previous study also separates the Eresidae and the Oecobiidae (Hersiliidae was not included) (eresoid families are again shaded):[6]

Entelegynae	Eresidae (Stegodyphus)       Araneoidea         Uloboridae (Philoponella)       Deinopidae (Deinopis)     Oecobiidae (Oecobius)         RTA Clade

A 2017 study also did not support Eresoidea, agreeing with earlier studies in placing Eresidae away from Hersiliidae and Oecobiidae, which were grouped as Oecobioidae.[7]

References

1. 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
2. Coddington, Jonathan A. & Levi, Herbert W. (1991), "Systematics and evolution of spiders (Araneae)", Annual Review of Ecology and Systematics, 22: 565–592, doi:10.1146/annurev.es.22.110191.003025, JSTOR 2097274, S2CID 55647804
3. Nentwig, Wolfgang, ed. (2013), "Appendix : Spider Phylogeny" (PDF), Spider Ecophysiology, Springer, ISBN 978-3-642-33988-2, retrieved 2015-11-03
4. Miller, Jeremy A.; Carmichael, Anthea; Ramírez, Martín J.; Spagna, Joseph C.; Haddad, Charles R.; Řezáč, Milan; Johannesen, Jes; Král, Jiří; Wang, Xin-Ping & Griswold, Charles E. (2010), "Phylogeny of entelegyne spiders: Affinities of the family Penestomidae (NEW RANK), generic phylogeny of Eresidae, and asymmetric rates of change in spinning organ evolution (Araneae, Araneoidea, Entelegynae)", Molecular Phylogenetics and Evolution, 55 (3): 786–804, doi:10.1016/j.ympev.2010.02.021, PMID 20206276
5. Hormiga, Gustavo & Griswold, Charles E. (2014), "Systematics, Phylogeny, and Evolution of Orb-Weaving Spiders", Annual Review of Entomology, 59 (1): 487–512, doi:10.1146/annurev-ento-011613-162046, PMID 24160416CS1 maint: ref=harv (link)
6. Bond, Jason E.; Garrison, Nicole L.; Hamilton, Chris A.; Godwin, Rebecca L.; Hedin, Marshal & Agnarsson, Ingi (2014), "Phylogenomics Resolves a Spider Backbone Phylogeny and Rejects a Prevailing Paradigm for Orb Web Evolution", Current Biology, 24 (15): 1765–1771, doi:10.1016/j.cub.2014.06.034, PMID 25042592
7. Wheeler, Ward C.; Coddington, Jonathan A.; Crowley, Louise M.; Dimitrov, Dimitar; Goloboff, Pablo A.; Griswold, Charles E.; Hormiga, Gustavo; Prendini, Lorenzo; Ramírez, Martín J.; Sierwald, Petra; Almeida-Silva, Lina; Alvarez-Padilla, Fernando; Arnedo, Miquel A.; Benavides Silva, Ligia R.; Benjamin, Suresh P.; Bond, Jason E.; Grismado, Cristian J.; Hasan, Emile; Hedin, Marshal; Izquierdo, Matías A.; Labarque, Facundo M.; Ledford, Joel; Lopardo, Lara; Maddison, Wayne P.; Miller, Jeremy A.; Piacentini, Luis N.; Platnick, Norman I.; Polotow, Daniele; Silva-Dávila, Diana; Scharff, Nikolaj; Szűts, Tamás; Ubick, Darrell; Vink, Cor J.; Wood, Hannah M. & Zhang, Junxia (2017) [published online 2016], "The spider tree of life: phylogeny of Araneae based on target-gene analyses from an extensive taxon sampling", Cladistics, 33 (6): 574–616, doi:10.1111/cla.12182, S2CID 35535038