{{Short description|Extinct family of gastropods}} {{Use dmy dates|date=May 2017}} {{Automatic taxobox |fossil_range = |image = |image_caption = |taxon = Isospiridae |authority = Wangberg-Eriksson, 1964<ref>Wangberg-Eriksson K. (1964). "''Isospira reticulata'' n. sp. from the Upper Ordovician Boda Limestone, Sweden". ''Geologiska Föreningen i Stockholm Förhandlingar'' '''86'''(3): 229-237.</ref> |subdivision_ranks = Genera |subdivision = }}

'''Isospiridae''' is an extinct family of fossil sea snails, Paleozoic gastropod molluscs.<ref name="Bouchet 2005">{{cite journal |author1=Bouchet, P. |author2=Rocroi, J.-P. | year = 2005 | date= | title = Classification and Nomenclator of Gastropod Families | journal = Malacologia | volume =47 | issue = 1-2 | pages = | issn = | doi = }}</ref>

This family is unassigned to superfamily. This family has no subfamilies according to the taxonomy by Bouchet & Rocroi (2005). It is classified as "Basal taxa that are certainly Gastropoda" by Bouchet & Rocroi (2005).<ref name="Bouchet 2005"/>

== Genera == * ''Isospira'' Koken, 1897 - type genus of the family Isospiridae. Species include:<ref>[https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=8340 "''Isospira''"]. The Paleobiology Database, accessed 26 February 2010.</ref> ** ''Isospira bucanioides'' Koken, 1897 ** ''Isospira huttoni'' Cowper Reed, 1921 ** ''Isospira lepida'' Perner, 1903 ** ''Isospira nautilina'' Koken & Perner, 1925 ** ''Isospira reinwaldti'' Öpik, 1930 ** ''Isospira reticulatus'' Wängberg-Eriksson, 1964 - synonym: ''Isospira reticulata''

== Taxonomy == Peter J. Wagner consider Isospiridae as synonym of Cyrtonellidae within Tergomya,<ref>Wagner P. J. (2008). [https://paleodb.org/cgi-bin/bridge.pl?user=Guest&action=displayPage&page=OSA_6_Paleozoic_gastropods "Paleozoic Gastropod, Monoplacophoran and Rostroconch Database".] [http://paleobackup.nceas.ucsb.edu:8110/cgi-bin/bridge.pl?action=displayReference&reference_no=9042]{{dead link|date=April 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref name="Cyrtonellidae paleodb">[https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=70839 "Cyrtonellidae"] The Paleobiology Database. Accessed 26 February 2010.</ref> The Paleobiology Database has become adatapted to<ref name="Cyrtonellidae paleodb"/> this unpublished opinion by Wagner.<!-- last check February 2010--> This alternate taxonomy is as: Tergomya, Cyrtonellida, Cyrtonellidae.<ref name="Cyrtonellidae paleodb"/>

== References == {{Reflist}}

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Category:Gastropod families Category:Prehistoric gastropods