International Commission on Zoological Nomenclature

Welcome to the ICZN

CaptureThe International Commission on Zoological Nomenclature (ICZN) acts as adviser and arbiter for the zoological community by generating and disseminating information on the correct use of the scientific names of animals. The ICZN is responsible for producing the International Code of Zoological Nomenclature - a set of rules for the naming of animals and the resolution of nomenclatural problems.

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News & Updates

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In memoriam: Pavel Štys (1933–2018) – Heteropterist and Commissioner

Fri, 2019-08-16 13:53 -- An obituary has been published for heteropterist and former Commissioner Pavel Štys (1933–2018) here. An announcement of his passing was published earlier this year in the Bulletin of Zoological Nomenclature.

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Cases updated

Mon, 2019-07-08 11:40 -- Information about Cases and Nomenclatural Notes published in the first tranche of articles for BZN volume 76 is now available from the website. We seek your patience as information from back issues and volumes are uploaded. Thank you very much.

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Migration of ICZN and Code websites

Mon, 2019-05-27 08:43 -- The ICZN and Code online websites have been migrated to a new platform and servers. The Commission and Secretariat would like to acknowledge and thank the team at the Natural History Museum (London) for hosting and maintaining the ICZN domain for all this time.

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First contribution to the List of Available Names in Zoology –- Species- and Genus- Parts of Phylum Rotifera

Tue, 2019-04-30 09:20 -- The International Commission of Zoological Nomenclature has adopted as Parts of the List of Available Names in Zoology both Candidate Parts of Phylum Rotifera, compiled by Jersabek et al. (2018a, b). The Ruling was published on the Bulletin of Zoological Nomenclature as Opinion 2430, on 30 April 2019 (link here, open access: These Parts are the first to be added to the List .

The ICZN would like to thank the LAN Committees as well as the international community of rotiferologists for this commendable effort.

In order to commemorate this occasion, the cover of this year's Bulletin features the winning photograph in a rotifer picture competition, of Keratella serrulata (Ehrenberg, 1838) © Michael Plewka, This is the first time the Bulletin has featured a photograph on its front cover.

PDFs of both Parts can be downloaded from (below), or from the ICZN website.

Candidate Part Phylum Rotifera, genus-group names established before 1 January 2000, compiled by Jersabek et al., 2018.

Candidate Part Phylum Rotifera, species-group names established before 1 January 2000, compiled by Jersabek et al., 2018.



Why are names important?

Case studies... more>>

Scientific names: reasons and best practices... more>>



ICZN activities depend to a crucial extent on donations from individuals, institutions, learned societies and grant-giving bodies.

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Latest Pages Updated

List of Available Names / Rotifer parts of the LAN - updated 2019-05-06 11:49 (GMT +8)

Outreach / Presentations  – updated 2019-03-19 11:45 (GMT +8)

The Bulletin of Zoological Nomenclature / Subscription and access – updated 2019-02-25 09:28 (GMT +8)