Login
Login

sigmurethra

{{Short description|Informal group of gastropods}}

{{Outdated as of | year = 2020 | month = 04 | day = 29 }}

{{Automatic taxobox

| fossil_range = {{fossil range|Cretaceous|Recent}}

| image = Sigmurethra various examples 1.jpg

| image_caption = Various examples of Sigmurethra

| image_alt = Various examples of Sigmurethra

| taxon = Sigmurethra

| authority =

| subdivision_ranks = Superfamilies

| subdivision =

|synonyms = * Helicina Rafinesque, 1815

|synonyms_ref = MolluscaBase (2018). Helicina. Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=994701 on 2018-02-22

}}

Sigmurethra is a taxonomic category of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. This is an informal group which includes most land snails and slugs.

The two strong synapomorphies of Sigmurethra are a long pedal gland placed beneath a membrane and retractile tentacles.Lunarejo. et al. 2008.

Several families in this group contain species of snails and slugs that create love darts.

Sigmurethra are known from the Cretaceous to the Recent periods.(in Czech) Pek I., Vašíček Z., Roček Z., Hajn. V. & Mikuláš R.: Základy zoopaleontologie. - Olomouc, 1996. 264 pp., {{ISBN|80-7067-599-3}}.

Taxonomy

=2005 Taxonomy=

In the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005, Sigmurethra is an "Informal Group", a subsection of the Stylommatophora.Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdés Á. & Warén A. 2005. Classification and nomenclator of gastropod families. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. {{ISBN|3-925919-72-4}}. {{ISSN|0076-2997}}. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278

It consists of the following families:

==[[limacoid clade]]==

==Informal group Sigmurethra continued==

Two superfamilies belongs to clade Sigmurethra, but they are not in the limacoid clade.

(Families that are exclusively fossil are indicated with a dagger †)

=New families after 2005=

  • Superfamily Streptaxoidea
  • Diapheridae - In 2010, Sutcharit et al. (2010)Sutcharit C., Naggs F., Wade C. M., Fontanilla I. & Panha S. (2010). "The new family Diapheridae, a new species of Diaphera Albers from Thailand, and the position of the Diapheridae within a molecular phylogeny of the Streptaxoidea (Pulmonata: Stylommatophora)". Zoological Journal of the Linnean Society 160: 1-16. {{doi|10.1111/j.1096-3642.2009.00598.x}}. established a new family Diapheridae within the Streptaxoidea.

=2017 Taxonomy=

After excluding groups not related, the informal group Sigmurethra becomes suborder Helicina, with the following nine infraorders and a collection of families with no superfamily：{{cite journal

|last1=Bouchet|first1=Philippe|author2-link=Jean-Pierre Rocroi|last2=Rocroi|first2=Jean-Pierre|last3=Hausdorf|first3=Bernhard|last4=Kaim|first4=Andrzej|last5=Kano|first5=Yasunori|last6=Nützel|first6=Alexander|last7=Parkhaev|first7=Pavel|last8=Schrödl|first8=Michael|last9=Strong|first9=Ellen E.

| year = 2017

| title = Revised Classification, Nomenclator and Typification of Gastropod and Monoplacophoran Families

| journal = Malacologia

| issue =1–2

| issn = 0076-2997

| pages =1–526

| volume = 61

| doi = 10.4002/040.061.0201

|s2cid=91051256|author1-link=Philippe Bouchet}}

{{cite WoRMS |year=2018 |title=Helicoidei |id=1057261 |access-date=2018-08-01 |db=MolluscaBase}}

References

{{Commons category|Sigmurethra}}

{{Wikispecies|Sigmurethra}}

{{Reflist}}

{{Taxonbar|from=Q3483567}}

Category:Stylommatophora

Category:Extant Cretaceous first appearances

Category:Gastropod taxonomy

Category:Obsolete gastropod taxa