Accepted by A. Santos: 22 Dec. 2016; published: 1 Mar. 2017
ISSN 1175-5326 (print edition)
Copyright © 2017 Magnolia Press
Zootaxa 4237 (3): 574
Peucetia casseli Simon, 1900 has priority over P. longipes Pocock, 1900
& DANIEL GLOOR
Callistus – Gemeinschaft für Zoologische & Ökologische Untersuchungen [association for zoological and ecological research],
Heidloh 8, 95503 Hummeltal, Germany. E-Mail: firstname.lastname@example.org
University of Bern, Institute of Ecology and Evolution, Baltzerstrasse 6, 3012 Bern, Switzerland. E-Mail: email@example.com
The World Spider Catalog (WSC 2016) currently lists Peucetia longipes Pocock, 1899 as a senior synonym of P. casseli
Simon, 1899; according to Niekerk & Dippenaar-Schoeman (1994: 16). The synonymy decision per se is not to be
doubted but, regarding the senior name choice, it was stated that “As both P. [Peucetia] longipes and P. casseli were
described in 1899, we decided to give P. longipes priority over P. casseli as the former species was more often referred to
in the literature.” So Niekerk & Dippenaar-Schoeman (1994) did not check the month or even the day of the two relevant
We became aware of this case while incorporating step by step corrections relating to the actual dates of publication
of the Proceedings of the Zoological Society of London, according to Duncan (1937, see also Dickinson 2005) into the
World Spider Catalog. After Duncan (1937) the paper by Pocock was published in April 1900. So we checked the
publication by Simon (1900) and found out that it too was not published in 1899, but on January 30, 1900 (Milne
The ICZN (2012) articles 184.108.40.206 and 220.127.116.11 (reversal of precedence) are not relevant in this case as the senior
name has been used after 1899 and no prevailing usage of the younger name can be stated. ICZN article 23.10 (erroneous
reversal of precedence) is not relevant either, as the synonymy was stated without checking the detailed dates of
Thus, based on ICZN article 24.2.5 (Unnecessary action by a First Reviser), and on the fact that Peucetia casseli
Simon, 1900 has priority over Peucetia longipes Pocock, 1900, the former must be considered the senior synonym of the
Thanks to Jason Dunlop (Berlin, Germany) for the linguistic checking as well as to Alessandro Minelli (Padova,
Italy) and to Mark Harvey (Perth, Australia) for commenting the case.
Dickinson, E.C. (2005) The Proceedings of the Zoological Society of London, 1859–1900: an exploration of breaks between calendar
years of publication. Journal of Zoology, 266 (4), 427–430.
Duncan, M. (1937) On the dates of publication of the society's Proceedings, 1859–1926. Proceedings of the Zoological Society of
London, A107 (1), 71–84.
ICZN [International Commission on Zoological Nomenclature] (2012) International Code of Zoological Nomenclature. 4
Incorporating Declaration 44, amendments of Article 74.7.3, with effect from 31 December 1999 and the amendment on e-
publication, amendments to Articles 8, 9, 10, 21 and 78, with effect from 1 January 2012. Available from: http://www.nhm.ac.uk/
hosted-sites/iczn/code/index.jsp (accessed 3 November 2016)
Milne Edwards, A. (1900) 41e réunion des naturalistes du muséum. 30 Janvier 1900. Bulletin du Muséum d'Histoire Naturelle, 6 (1), 1.
Niekerk, P. van & Dippenaar-Schoeman, A.S. (1994) A revision of the Afrotropical species of Peucetia (Araneae: Oxyopidae).
Entomology Memoir, Department of Agriculture Republic of South Africa, 89, 1–50.
Pocock, R.I. (1900) On the scorpions, pedipalps and spiders from tropical West-Africa, represented in the collection of the British
Museum. Proceedings of the Zoological Society of London, 67 (4), 833–885, pls. LV–LVIII. [for 1899]
Simon, E. (1900) Arachnides recueillis par M. Charles van Cassel, sous-officier d'infanterie attaché à la Mission du Cavally (Soudan
françois), au poste du Zò, en septembre 1899. Bulletin du Muséum d'Histoire Naturelle, 5 (8), 416–419. [for 1899]
WSC (2016) World Spider Catalog. Natural History Museum Bern. Version 17.5. Available from: http://wsc.nmbe.ch (accessed 3