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Zeidora

Zeidora is a genus of sea snails, marine gastropod mollusks in the family Fissurellidae, the keyhole limpets.

Last revised
Jul 22, 2026
Read time
≈ 3 min
Length
606 w
Citations
8
Source
Zeidora
Shell of Zeidora crepidula
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Lepetellida
Superfamily: Fissurelloidea
Family: Fissurellidae
Subfamily: Zeidorinae
Genus: Zeidora
Adams, 1860
Type species
Zeidora calceolina
Adams, 1860
Synonyms1
  • Crepiemarginula Seguenza, 1880
  • Emarginula (Nesta) H. Adams, 1870 ·
  • Legrandia Beddome, 1883 (invalid: junior homonym of Legrandia Hanley, 1872)
  • Nesta Adams, 1870
  • Zidora Fischer, 1885 (invalid: unjustified emendation of Zeidora Adams, 1860)

Zeidora is a genus of sea snails, marine gastropod mollusks in the family Fissurellidae, the keyhole limpets.1

Description

The genus Zeidora was instituted by A. Adams in 1860, for the reception of two Japanese shells having the outer aspect of Emarginula and an internal shelf as in Crepidula.2

The shell resembles Emarginula, with the margin of the aperture crenulated and anteriorly deeply fissured, but there is posteriorly an internal, flat, semilunar septum present, which distinguishes this genus from any other Fissurellidae.3

Species

Species within the genus Zeidora include:

Species brought into synonymy
References

References

  • Higo, S., Callomon, P. & Goto, Y. (1999) Catalogue and Bibliography of the Marine Shell-Bearing Mollusca of Japan. Elle Scientific Publications, Yao, Japan, 749 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. 180–213
  • Spencer, H.; Marshall. B. (2009). All Mollusca except Opisthobranchia. In: Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp
  • Aldea C., Zelaya D.G. & Troncoso J.S. (2011) A new gigantic species of Zeidora Adams, 1860 from Antarctic waters (Gastropoda: Fissurellidae). The Nautilus 125(2): 79-82
External links