Pyramidelloidea

{{Short description|Superfamily of gastropods}} {{Automatic taxobox | name =Pyramidelloidea | image = Turbonilla acutissima.png | image_caption = live ''Turbonilla acutissima'' | image2 = Pyramidella maculosa - D'Orbigny.jpg | image2_caption = Two views of a shells of ''Pyramidella acus'' | taxon = Pyramidelloidea | authority = J. E. Gray, 1840<ref>{{cite book | last = Gray | first = J. E. | title = Synopsis of the contents of the British Museum | edition = 42nd | publisher = London | date = 1840 | pages =370 pp | isbn = }}</ref> }}

'''Pyramidelloidea''' is a superfamily of mostly very small sea snails, marine gastropod mollusks and micromollusks within the clade Panpulmonata.<ref name="Jörger 2010"/>

This is a voluminous taxon: above the species level close to 400 named taxa are referred to this gastropod superfamily.

Pyramidelloidea has both fossil and recent members. They live as ectoparasites on bivalve molluscs and polychaete worms, and have a sharp, piercing stylet instead of a radula.<ref name=IZ>{{cite book |author= Barnes, Robert D. |year=1982 |title= Invertebrate Zoology |publisher= Holt-Saunders International |location= Philadelphia, PA|pages= 376|isbn= 0-03-056747-5}}</ref>

==Distribution== This taxon is found worldwide.

==Taxonomy ==

=== 1999 taxonomy === Taxonomy by Schander, Van Aartsen & Corgan (1999):<ref>{{cite journal | author = Schander, C. | author2 = van Aartsen, J. J. | author3 = Corgan, J. C. | year = 1999 | title = Families and genera of the Pyramidelloidea (Mollusca: Gastropoda) | journal = Bollettino Malacologico | volume =34 | issue = 9–12 | pages = 145–166 | issn = | doi = }}</ref>

*Superfamily Pyramidelloidea Gray, 1840 **Family Amathinidae Ponder, 1987 **Family Ebalidae Warén, 1994 - synonym: Anisocyclidae van Aartsen, 1995 **Family Odostomiidae Pelseneer, 1928 ***Subfamily Odostomiinae Pelseneer, 1928 ***Subfamily Chrysallidinae Saurin, 1958 ***Subfamily Odostomellinae Saurin, 1958 ***Subfamily Cyclostremellinae Moore, 1966 **Family Pyramidellidae J. E. Gray, 1840 ***Subfamily Pyramidellinae J.E. Gray, 1840 ***Subfamily Sayellinae Wise, 1996 **Family Syrnolidae Saurin, 1958 ***Subfamily Syrnolinae Saurin, 1958 ***Subfamily Tiberiinae Saurin, 1958 **Family Turbonillidae Bronn, 1849 ***Subfamily Turbonillinae Bronn, 1849 ***Subfamily Eulimellinae Saurin, 1958 ***Subfamily Cingulininae Saurin, 1959

=== 2005 taxonomy === Pyramidelloidea has been classified within the informal group Lower Heterobranchia in the taxonomy of Bouchet & Rocroi (2005).<ref name="Bouchet 2005">{{Bouchet 2005}}</ref>

Taxonomy of Bouchet & Rocroi, 2005: *Superfamily Pyramidelloidea **Family Pyramidellidae **Family Amathinidae ** † Family Heteroneritidae **Family Murchisonellidae

=== 2010 taxonomy === Jörger et al. (2010)<ref name="Jörger 2010"/> have redefined major groups within the Heterobranchia and they moved Pyramidelloidea to Panpulmonata.<ref name="Jörger 2010">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|doi-access=free}}.</ref>

== Pyramidelloidean genera of uncertain familial position == * ''Bidentata'' de Castellanos, 1982 * ''Calyptopolyptychia'' Gougerot, 1968 * ''Laeviselica'' Gougerot & Le Renard, 1977 * ''Lysacme'' Dall & Bartsch, 1904 * ''Microthyca'' A. Adams, 1863 * ''Oopyramis'' Thiele, 1930 * ''Sulcorinella'' Dall & Bartsch, 1904

== References == {{Reflist}}

Category:Panpulmonata Category:Ectoparasites Category:Marine gastropods Category:Taxa named by John Edward Gray