Euthyneura

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Euthyneura
Snail-WA papa edit.jpg
Cepaea nemoralis
Scientific classification edit
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Infraclass: Euthyneura
Johann Wilhelm Spengel, 1881[1]
Diversity[2]
over 30000 species

Euthyneura is a taxonomic clade of snails and slugs, which includes species from freshwater, marine, aquatic and terrestrial gastropod mollusks in the clade Heterobranchia.

Euthyneura are considered the crown group of Gastropoda, and are characterised by several autapomorphies, but are named for euthyneury. They are considered to be the most successful and diverse group of Gastropoda. Within this taxon, the Gastropoda have reached their peak in species richness and ecological diversity. This obvious evolutionary success can probably be attributed to several factors. Marine Opisthobranchia, e.g., have evolved several clades specialised on less used food resources such as sponges or cnidarians. A key innovation in the evolution of Pulmonata was the colonization of freshwater and terrestrial habitats.[3]

Various phylogenetic studies focused on Euthyneura: Dayrat et al. (2001),[4] Dayrat & Tillier (2002)[5] and Grande et al. (2004).[6] Morphological analyses by Dayrat and Tillier (2002)[5] demonstrated the need to explore new datasets in order to critically analyse the phylogeny of this controversial group of gastropods. Klussmann-Kolb et al. (2008) traced an evolutionary scenario regarding colonisation of different habitats based on phylogenetic hypothesis and they showed that traditional classification of Euthyneura needs to be reconsidered.[3]

2010 taxonomy[edit]

Jörger et al. (2010)[7] have redefined major groups within the Heterobranchia and a cladogram showing phylogenic relations of Euthyneura is as follows:[7]

Heterobranchia

Lower Heterobranchia (including Acteonoidea) - Lower Heterobranchia does not form a clade in the study by Jörger et al. (2010):[7]

Euthyneura

Nudipleura

Euopisthobranchia

Panpulmonata

2014 taxonomy[edit]

Cladogram showing phylogenic relations of Euthyneura sensu Wägele et al. (2014):[8][2]

Heterobranchia

Lower Heterobranchia

Euthyneura
Acteonacea

Rissoelloidea

Acteonoidea

Nudipleura

Pleurobranchoidea

Nudibranchia

Anthobranchia

Cladobranchia

Tectipleura

Euopisthobranchia

Panpulmonata

2016 taxonomy[edit]

Kano et al. (2016) proposed a new taxon Ringipleura and classified Ringiculoidea as sister group to Nudipleura:[2]

Heterobranchia

Lower Heterobranchia

Euthyneura
Acteonacea

Rissoelloidea

Acteonoidea

Ringipleura

Ringiculoidea

Nudipleura

Tectipleura

Euopisthobranchia

Panpulmonata


References[edit]

This article incorporates CC-BY-2.0 text from the reference[3]

  1. ^ Johann Wilhelm Spengel (1881). "Die Geruchsorgane und des Nervensystem der Mollusken". Zeitschrift für wissenschaftliche Zoologie 35(3): 333-383.
  2. ^ a b c Kano, Yasunori; Brenzinger, Bastian; Nützel, Alexander; Wilson, Nerida G.; Schrödl, Michael (2016-08-08). "Ringiculid bubble snails recovered as the sister group to sea slugs (Nudipleura)". Scientific Reports. 6: 30908. doi:10.1038/srep30908. ISSN 2045-2322. Retrieved 2017-05-12.
  3. ^ a b c Klussmann-Kolb A., Dinapoli A., Kuhn K., Streit B. & Albrecht C. (2008). "From sea to land and beyond – New insights into the evolution of euthyneuran Gastropoda (Mollusca)". BMC Evolutionary Biology 2008, 8: 57. doi:10.1186/1471-2148-8-57.
  4. ^ Dayrat B., Tillier A., Lecointre G. & Tillier S. (2001). "New clades of euthyneuran Gastropods (Mollusca) from 28S rRNA sequences". Molecular Phylogenetics and Evolution 19(2): 225-235. doi:10.1006/mpev.2001.0926.
  5. ^ a b Dayrat B. & Tillier S. (2002). "Evolutionary relationships of euthyneuran gastropods (Mollusca): a cladistic re-evaluation of morphological characters". Zoological Journal of the Linnean Society 135(4): 403-470. doi:10.1046/j.1096-3642.2002.00018.x
  6. ^ Grande C., Templado J., Cervera J. L. & Zardoya R. (2004). "Molecular Phylogeny of Euthyneura (Mollusca: Gastropoda)". Molecular Biology and Evolution 21(2): 303-313. doi:10.1093/molbev/msh016.
  7. ^ a b c 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.
  8. ^ Wägele H., Klussmann-Kolb A., Verbeek E. & Schrödl M. (2014). "Flashback and foreshadowing—a review of the taxon Opisthobranchia". Organisms Diversity & Evolution 14(1): 133–149. doi:10.1007/s13127-013-0151-5

External links[edit]