International Commission on Zoological Nomenclature
 INTERNATIONAL CODE OF ZOOLOGICAL NOMENCLATURE online

Article 3. Starting point. The date 1 January 1758 is arbitrarily fixed in this Code as the date of the starting point of zoological nomenclature.

3.1. Works and names published in 1758. Two works are deemed to have been published on 1 January 1758:
- Linnaeus's Systema Naturae, 10th Edition;
- Clerck's Aranei Svecici.
Names in the latter have precedence over names in the former, but names in any other work published in 1758 are deemed to have been published after the 10th Edition of Systema Naturae.

3.2. Names, acts and information published before 1758. No name or nomenclatural act published before 1 January 1758 enters zoological nomenclature, but information (such as descriptions or illustrations) published before that date may be used. (See Article 8.7.1 for the status of names, acts and information in works published after 1757 which have been suppressed for nomenclatural purposes by the Commission).