# Diodora

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{{Short description|Genus of gastropods}}
{{Automatic taxobox
| image = Keyhole_limpet_01.jpg
| image_caption = Shells of ''[Diodora cayenensis](/source/Diodora_cayenensis)''
| taxon = Diodora
| authority = [Gray](/source/John_Edward_Gray), 1821
| subdivision_ranks = Species
| subdivision = See text
| synonyms_ref = <ref name="WoRMS" />
| synonyms=
* ''Austroglyphis'' <small>Cotton & Godfrey, 1934</small>
* ''Capiluna'' <small>Gray, 1857</small>
* ''Diodora (Diodora)'' <small>Gray, 1821</small>
* ''Elegidion'' <small>Iredale, 1924</small>
* ''Fissuridea'' <small>Swainson, 1840</small>
* ''Glyphis'' <small>[Carpenter](/source/Philip_Pearsall_Carpenter), 1857</small> (invalid: junior homonym of ''Glyphis'' <small>Agassiz, 1843</small>)
* ''Monodilepas'' <small>Finlay, H.J. 1926</small>
| type_species= ''Diodora graeca apertura'' (f) <small>Montagu, G., 1803</small>
}}

'''''Diodora''''' is a [genus](/source/genus) of small to medium-sized [keyhole limpet](/source/keyhole_limpet) in the family Fissurellidae.<ref name="WoRMS">Bouchet, P.; Gofas, S.; Rosenberg, G. (2012). Diodora J. E. Gray, 1821. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138011 on 21 May 2012</ref>

== Life habits==
Like all other fissurellids, ''Diodora'' species are herbivores, and use the [radula](/source/radula) to scrape algae from rocks. An exception is ''D. apertura'', which grazes on sponges<ref>{{Cite journal | journal=Journal of Molluscan Studies|title=Torsion and the adult snail: a re-evaluation|date=1958|volume=33|issue=1|pages=2–10|doi=10.1093/oxfordjournals.mollus.a064794 |last1=Morton|first1=J. E.}}</ref><ref>{{cite journal | title =  Molluscan diets | last1=Graham|first1= A. | journal = Journal of Molluscan Studies | year= 1955 | volume= 31 | issue= 3–4 | pages= 144–158|doi=10.1093/oxfordjournals.mollus.a064734 }}</ref> such as ''[Hymeniacidon](/source/Hymeniacidon)''.<ref name="Fretter2009">{{Cite journal | last1 = Fretter | first1 = V. | title = Observation on the life history and functional morphology of Cerithiopsis tubercularis (Montagu) and Triphora perversa (L.) | journal = Journal of the Marine Biological Association of the United Kingdom | volume = 29 | issue = 3 | pages = 567–586 | year = 2009 | doi = 10.1017/S0025315400052784 | s2cid = 55782668 }}</ref>

Water for respiration and excretion is drawn in under the edge of the shell and exits through the "keyhole" at or near the apex.

==Species==
Species in this genus include:<ref>Malacolog list of Western Atlantic ''Diodora'' species at: [http://www.malacolog.org/search.php?mode=findsnail&genus=diodora&associatedname=&author=&year=&yearend=&Search=Search]. accessed 21 September 2009.</ref>
thumb|225px|''Diodora elizabethae''
thumb|225px|''Diodora saturnalis''
thumb|''Diodora patagonica''
{{div col|colwidth=20em}}
* ''[Diodora aguayoi](/source/Diodora_aguayoi)'' <small>[Pérez Farfante](/source/Isabel_P%C3%A9rez_Farfante), 1943</small>
* ''[Diodora alta](/source/Diodora_alta)'' <small>([Adams](/source/Charles_Baker_Adams), 1852)</small>
* ''[Diodora arcuata](/source/Diodora_arcuata)'' <small>([Sowerby II](/source/George_Brettingham_Sowerby_II), 1862)</small>
* ''[Diodora arnoldi](/source/Diodora_arnoldi)'' <small>McLean, 1966</small>
* ''[Diodora aspera](/source/Diodora_aspera)'' <small>([Rathke](/source/Martin_Rathke), 1833)</small> 
* ''[Diodora australis](/source/Diodora_australis)'' <small>([Krauss](/source/Christian_Ferdinand_Friedrich_Krauss), 1848)</small>
* ''[Diodora benguelensis](/source/Diodora_benguelensis)'' <small>(Dunker, 1846)</small>
* ''[Diodora bermudensis](/source/Diodora_bermudensis)'' <small>([Dall](/source/William_Healey_Dall) & Bartsch, 1911)</small>
* ''[Diodora bollonsi](/source/Diodora_bollonsi)'' <small>(Oliver, 1915)</small> 
* ''[Diodora calyculata](/source/Diodora_calyculata)'' <small>([Sowerby I](/source/George_Brettingham_Sowerby_I), 1823)</small>
* ''[Diodora canariensis](/source/Diodora_canariensis)'' <small>Verstraeten & Naef, 2007</small>
* ''[Diodora candida](/source/Diodora_candida)'' <small>([Sowerby I](/source/George_Brettingham_Sowerby_I), 1835)</small>
* ''[Diodora cayenensis](/source/Diodora_cayenensis)'' <small>([Lamarck](/source/Jean-Baptiste_Lamarck), 1822)</small>
* ''[Diodora corbicula](/source/Diodora_corbicula)'' <small>([Sowerby II](/source/George_Brettingham_Sowerby_II), 1862)</small> 
* ''[Diodora cruciata](/source/Diodora_cruciata)'' <small>([Gould](/source/Augustus_Addison_Gould), 1846)</small>
* ''[Diodora crucifera](/source/Diodora_crucifera)'' <small>[Pilsbry](/source/Henry_Augustus_Pilsbry), 1890</small>
* ''[Diodora delicata](/source/Diodora_delicata)'' <small>([Smith](/source/Edgar_Albert_Smith), 1899)</small>
* ''[Diodora demartiniorum](/source/Diodora_demartiniorum)'' <small>Buzzurro & Russo, 2004</small>
* ''[Diodora digueti](/source/Diodora_digueti)'' <small>(Mabille, 1895)</small>
* ''[Diodora dorsata](/source/Diodora_dorsata)'' <small>([Monterosato](/source/Tommaso_di_Maria_Allery_Monterosato), 1878)</small>
* ''[Diodora dysoni](/source/Diodora_dysoni)'' <small>([Reeve](/source/Lovell_Augustus_Reeve), 1850)</small>
* ''[Diodora elevata](/source/Diodora_elevata)'' (<small>Dunker, 1846)</small>
* ''[Diodora elizabethae](/source/Diodora_elizabethae)'' <small>([Smith](/source/Edgar_Albert_Smith), 1901)</small> 
* ''[Diodora fargoi](/source/Diodora_fargoi)'' <small>Olsson & McGinty, 1958</small>
* ''[Diodora fluviana](/source/Diodora_fluviana)'' <small>([Dall](/source/William_Healey_Dall), 1889)</small>
* ''[Diodora fontainiana](/source/Diodora_fontainiana)'' <small>([d'Orbigny](/source/Alcide_d'Orbigny), 1841)</small>
* ''[Diodora fragilis](/source/Diodora_fragilis)'' <small>[Pérez Farfante](/source/Isabel_P%C3%A9rez_Farfante) & Henríquez, 1947</small>
* ''[Diodora funiculata](/source/Diodora_funiculata)'' <small>([Reeve](/source/Lovell_Augustus_Reeve), 1850)</small>
* ''[Diodora fuscocrenulata](/source/Diodora_fuscocrenulata)'' <small>([Smith](/source/Edgar_Albert_Smith), 1906)</small> érez Farfante
* ''[Diodora galeata](/source/Diodora_galeata)'' <small>(Helbing, 1779)</small>
* ''[Diodora giannispadai](/source/Diodora_giannispadai)'' <small>Aissaoui, Puillandre & Bouchet, 2017</small>
* ''[Diodora gibberula](/source/Diodora_gibberula)'' <small>([Lamarck](/source/Jean-Baptiste_Lamarck), 1822)</small> 
* ''[Diodora graeca](/source/Diodora_graeca)'' <small>([Linnaeus](/source/Carl_Linnaeus), [1758](/source/10th_edition_of_Systema_Naturae))</small>
* ''[Diodora granifera](/source/Diodora_granifera)'' <small>([Pease](/source/William_Harper_Pease), 1861)</small>
* ''[Diodora harrassowitzi](/source/Diodora_harrassowitzi)'' <small>(Ihering, 1927)</small>
* ''[Diodora inaequalis](/source/Diodora_inaequalis)'' <small>(Sowerby, 1835)</small>
* ''[Diodora italica](/source/Diodora_italica)'' <small>([DeFrance](/source/Jacques_Louis_Marin_DeFrance), 1820)</small>
* ''[Diodora jaumei](/source/Diodora_jaumei)'' <small>Aguayo & Rehder, 1936</small>
* ''[Diodora jukesii](/source/Diodora_jukesii)'' <small>([Reeve](/source/Lovell_Augustus_Reeve), 1850)</small> 
* ''[Diodora levicostata](/source/Diodora_levicostata)'' <small>([Smith](/source/Edgar_Albert_Smith), 1914)</small>
* ''[Diodora lima](/source/Diodora_lima)'' <small>([Sowerby II](/source/George_Brettingham_Sowerby_II), 1862)</small>
* ''[Diodora lincolnensis](/source/Diodora_lincolnensis)'' <small>(Cotton, 1930)</small>
* ''[Diodora lineata](/source/Diodora_lineata)'' <small>([Sowerby I](/source/George_Brettingham_Sowerby_I), 1835)</small>
* ''[Diodora listeri](/source/Diodora_listeri)'' <small>([d'Orbigny](/source/Alcide_d'Orbigny), 1847)</small>
* ''[Diodora lorenzi](/source/Diodora_lorenzi)'' <small>Cossignani, 2020</small>
* ''[Diodora magnifica](/source/Diodora_magnifica)'' <small>Poppe & Tagaro, 2020</small>
* ''[Diodora menkeana](/source/Diodora_menkeana)'' <small>(Dunker, 1846)</small>
* ''[Diodora meta](/source/Diodora_meta)'' <small> (Ihering, 1927)</small>
* ''[Diodora minuta](/source/Diodora_minuta)'' <small>([Lamarck](/source/Jean-Baptiste_Lamarck), 1822)</small>
* ''[Diodora mirifica](/source/Diodora_mirifica)'' <small>Métivier, 1972</small>
* ''[Diodora namibiensis](/source/Diodora_namibiensis)'' <small>Poppe, Tagaro & Sarino, 2011</small><ref name="Poppe_Namibia">{{cite journal |author=G. T. Poppe, S. P. Tagaro & J. C. Sarino |year=2011 |title=Two new species of Fissurellidae from Namibia |journal=[Visaya](/source/Visaya) |volume=3 |issue=4 |pages=71–75}}</ref>
* ''[Diodora occidua](/source/Diodora_occidua)'' <small>(Cotton, 1930)</small> 
* ''[Diodora occultata](/source/Diodora_occultata)'' <small>Poppe & Tagaro, 2020</small>
* ''[Diodora octagona](/source/Diodora_octagona)'' <small>([Reeve](/source/Lovell_Augustus_Reeve), 1850)</small>
* ''[Diodora panamensis](/source/Diodora_panamensis)'' <small>(Sowerby, 1835)</small>
* ''[Diodora parviforata](/source/Diodora_parviforata)'' <small>([Sowerby III](/source/George_Brettingham_Sowerby_III), 1889)</small>
* ''[Diodora patagonica](/source/Diodora_patagonica)'' <small>([d'Orbigny](/source/Alcide_d'Orbigny), 1839)</small>
* ''[Diodora philippiana](/source/Diodora_philippiana)'' <small>(Dunker, 1846)</small> 
* ''[Diodora pica](/source/Diodora_pica)'' <small>([Sowerby I](/source/George_Brettingham_Sowerby_I), 1835)</small>
* ''[Diodora producta](/source/Diodora_producta)'' <small>([Monterosato](/source/Tommaso_di_Maria_Allery_Monterosato), 1880)</small>
* ''[Diodora punctifissa](/source/Diodora_punctifissa)'' <small>McLean, 1970</small>
* ''[Diodora pusilla](/source/Diodora_pusilla)'' <small>Berry, 1959</small>
* ''[Diodora quadriradiata](/source/Diodora_quadriradiata)'' <small>([Reeve](/source/Lovell_Augustus_Reeve), 1850)</small> 
* ''[Diodora ruppellii](/source/Diodora_ruppellii)'' <small>([Sowerby I](/source/George_Brettingham_Sowerby_I), 1835)</small> 
* † ''[Diodora sancticlementensis](/source/Diodora_sancticlementensis)'' <small>Landau, Van Dingenen & Ceulemans, 2017</small> 
* ''[Diodora sarasuae](/source/Diodora_sarasuae)'' <small>Espinosa, 1984</small>
* ''[Diodora saturnalis](/source/Diodora_saturnalis)'' <small>([Carpenter](/source/Philip_Pearsall_Carpenter), 1864)</small>
* ''[Diodora sayi](/source/Diodora_sayi)'' <small>([Dall](/source/William_Healey_Dall), 1889)</small>
* ''[Diodora sculptilis](/source/Diodora_sculptilis)'' <small>Rolán & Gori, 2011</small>
* ''[Diodora serae](/source/Diodora_serae)'' <small>Espinosa & Ortea, 2011</small>
* ''[Diodora sieboldii](/source/Diodora_sieboldii)'' <small>([Reeve](/source/Lovell_Augustus_Reeve), 1850)</small>
* ''[Diodora singaporensis](/source/Diodora_singaporensis)'' <small>([Reeve](/source/Lovell_Augustus_Reeve), 1850)</small> 
* ''[Diodora spreta](/source/Diodora_spreta)'' <small>([Smith](/source/Edgar_Albert_Smith), 1901)</small>
* † ''[Diodora stalennuyi](/source/Diodora_stalennuyi)'' <small>Dell'Angelo, Sosso, O. Anistratenko & V. Anistratenko, 2017</small> 
* ''[Diodora tanneri](/source/Diodora_tanneri)'' <small>([Verrill](/source/Addison_Emery_Verrill), 1882)</small>
* ''[Diodora tenuiclathrata](/source/Diodora_tenuiclathrata)'' <small>(Seguenza, 1863)</small>
* ''[Diodora terezae](/source/Diodora_terezae)'' <small>Neves, Castillo & Ramil, 2019</small>
* ''[Diodora ticaonica](/source/Diodora_ticaonica)'' <small>([Reeve](/source/Lovell_Augustus_Reeve), 1850)</small> 
* ''[Diodora variegata](/source/Diodora_variegata)'' <small>([Sowerby II](/source/George_Brettingham_Sowerby_II), 1862)</small>
* ''[Diodora vetula](/source/Diodora_vetula)'' <small>(Woodring, 1928)</small>
* ''[Diodora viridula](/source/Diodora_viridula)'' <small>([Lamarck](/source/Jean-Baptiste_Lamarck), 1822)</small>
* ''[Diodora wetmorei](/source/Diodora_wetmorei)'' <small>[Pérez Farfante](/source/Isabel_P%C3%A9rez_Farfante), 1945</small> 
{{div col end}}
Synonyms:
* ''Diodora fimbriata'' <small>Reeve, 1850</small> : synonym of ''Diodora jukesii'' <small>(Reeve, 1850)</small>
* ''Diodora natalensis'' <small>(([Krauss](/source/Christian_Ferdinand_Friedrich_Krauss), 1848), 1848)</small>: synonym of ''[Fissurella natalensis](/source/Fissurella_natalensis)'' <small>Krauss, 1848</small>
* ''Diodora nigropunctata'' <small>Thiele, 1930</small>: synonym of  ''Diodora jukesii'' <small>(Reeve, 1850)</small>
* ''Diodora noachina'' <small>(Linnaeus, 1771)</small>: synonym of ''[Puncturella noachina](/source/Puncturella_noachina)'' <small>(Linnaeus, 1771)</small>
* ''Diodora octogona'' [sic]: synonym of ''Diodora octagona'' <small>(Reeve, 1850)</small>
* ''Diodora ovalis'' <small>Thiele, 1930</small>: synonym of  ''Diodora singaporensis'' <small>(Reeve, 1850)</small>
* ''Diodora philippiana'' <small>(Finlay, 1930)</small>: synonym of ''[Lucapina philippiana](/source/Lucapina_philippiana)'' <small>(Finlay, 1930)</small>
* ''Diodora plicifera'' <small>Thiele, 1930</small>: synonym of ''Diodora jukesii'' <small>(Reeve, 1850)</small>
* ''Diodora reevei'' <small>Schepman, 1908</small>: synonym of ''Diodora octagona'' <small>(Reeve, 1850)</small>
* ''Diodora ruppellii'' <small>(G.B. Sowerby I, 1835)</small>: synonym of ''Diodora rueppellii'' <small>(G.B. Sowerby I, 1835)</small>
* ''Diodora rugosa'' <small>Thiele, 1930</small>: synonym of  ''Diodora lineata'' <small>(G.B. Sowerby I, 1835)</small>

thumb|225px|''Diodora lineata''
Further species include <ref>[http://www.discoverlife.org/20/q Discover Life : Diodora]</ref>
* ''[Diodora alternata](/source/Diodora_alternata)'' <small>Say, 1822</small>
* ''[Diodora beebei](/source/Diodora_beebei)'' <small>(Hertlein and Strong, 1951)</small>
* ''[Diodora bombayana](/source/Diodora_bombayana)'' <small>Sowerby, 1862</small>
* ''[Diodora carditella](/source/Diodora_carditella)'' <small>Dall</small>
* ''[Diodora crenifera](/source/Diodora_crenifera)'' <small>(Sowerby, 1835)</small>
* ''[Diodora densiclathrata](/source/Diodora_densiclathrata)'' <small>McLean, 1966</small>
* ''[Diodora elaborata](/source/Diodora_elaborata)'' <small>Sowerby</small>
* ''[Diodora fusilla](/source/Diodora_fusilla)'' <small>S. S. Berry, 1959</small> (or ''Diodora pusilla'' <small>Berry, 1959</small> ?)
* ''[Diodora habanensis](/source/Diodora_habanensis)'' <small>Christiaens, 1975</small>
* ''[Diodora murina](/source/Diodora_murina)'' <small>Arnold, 1903</small>
* ''[Diodora mus](/source/Diodora_mus)'' <small>(Reeve, 1850)</small>
* ''[Diodora nucula](/source/Diodora_nucula)'' <small>(Dall)</small>
* ''[Diodora semilunata](/source/Diodora_semilunata)'' <small>(Habe, 1953)</small>
* ''[Diodora suprapunicea](/source/Diodora_suprapunicea)'' <small>(Otuka, 1937)</small>
* ''[Diodora tenebrosa](/source/Diodora_tenebrosa)'' <small>Conrad</small>
* ''[Diodora vola](/source/Diodora_vola)'' <small>Reeve</small>

==References==
{{Reflist}}
* Gray, J.E. 1821. ''A natural arrangement of Mollusca according to their internal structure''. London Medical Repository 15: 229-239 
* Swainson, W. 1840. ''A Treatise on Malacology or the Natural Classification of Shells and Shell-fish.'' London : Longman, Brown, Green & Longmans 419 pp.
* Gray, J.E. 1847. ''A list of the Genera of Recent Mollusca, their Synonyms and Types.'' Proceedings of the Zoological Society of London 15: 129-242
* Gray, J.E. 1857. ''Guide to the Systematic Distribution of the Mollusca in the British Museum''. London : British Museum Trustees 230 pp.
* Carpenter, P.P. 1857. ''Catalogue of the collection of Mazatlan shells in the British Museum collected by Frederik Reigen''. London : British Museum pp. i-xii, 1-552. [220] 
* Iredale, T. 1924. Results from Roy Bell's molluscan collections. Proceedings of the Linnean Society of New South Wales 49(3): 179-279, pls 33-36
* Finlay, H.J. 1926. ''A further commentary on New Zealand molluscan systematics.'' Transactions of the New Zealand Institute 57: 320-485 pls 18-23 
* Cotton, B.C. & Godfrey, F.K. 1934. ''South Australian Shells. Part 10''. South Australian Naturalist 15(2): 41-56
* Moore, R.C. (ed.) 1960. ''[Treatise on Invertebrate Paleontology](/source/Treatise_on_Invertebrate_Paleontology). Part I. Mollusca'' 1. Boulder, Colorado & Lawrence, Kansas : Geological Society of America & University of Kansas Press xxiii + 351 pp.
* Vaught, K.C. (1989). ''A classification of the living Mollusca''. American Malacologists: Melbourne, FL (USA). {{ISBN|0-915826-22-4}}. XII, 195 pp.
* Wilson, B. 1993. ''Australian Marine Shells. Prosobranch Gastropods''. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp.
* Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). ''European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification.'' Collection Patrimoines Naturels, 50: pp.&nbsp;180–213
* Aktipis, S.W., Boehm, E. & Giribet, G. 2011. ''Another step towards understanding the slit-limpets (Fissurellidae, Fissurelloidea, Vetigastropoda, Gastropoda): a combined five-gene molecular phylogeny.'' Zoologica Scripta 40(3): 238-259

== External links ==
{{Commons category|Diodora}}
* [http://www.environment.gov.au/biodiversity/abrs/online-resources/fauna/index.html  Australian Faunal Directory]
* [http://www.nhm.org/site/sites/default/files/pdf/contrib_science/CS475.pdf McLean J.H. & Geiger D.L. (1998). New genera and species having the Fissurisepta shell form, with a generic-level phylogenetic analysis (Gastropoda: Fissurellidae). Contributions in Science, Natural History Museum of Los Angeles County, 475: 1-32]
* [https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/1605/5667  Serge GOFAS, Ángel A. LUQUE, Joan Daniel OLIVER, José TEMPLADO & Alberto SERRA (2021) - The Mollusca of Galicia Bank (NE Atlantic Ocean); European Journal of Taxonomy 785: 1–114]

{{Taxonbar|from=Q5240415}}

Category:Diodora
Category:Fissurellidae
Category:Taxa named by John Edward Gray
[it:Diodora](/source/it%3ADiodora)

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Adapted from the Wikipedia article [Diodora](https://en.wikipedia.org/wiki/Diodora) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Diodora?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.