92urn:lsid:arphahub.com:pub:2C6A2F46-907D-598D-BC9D-71D8D326865FVegetation Classification and SurveyVCS2683-0671Pensoft Publishers10.3897/VCS/2021/6843068430Nomenclatural ProposalPhytosociological nomenclatureEuropeSouthern Europe and MediterraneanRequests (1–2) for a binding decision on the name-giving taxa in the names Isoeto-Cicendietum Br.-Bl. 1967 and Verbeno-Gnaphalietum Rivas Goday 1970SilvaVasco1silvadavasco@gmail.comhttps://orcid.org/0000-0003-2729-1824MolinaJosé Antonio2https://orcid.org/0000-0003-4348-6015Centre for Applied Ecology “Prof. Baeta Neves” (CEABN, InBIO), School of Agriculture, University of Lisbon, Lisbon, Portugal, silvadavasco@gmail.comUniversity of LisbonLisbonPortugalDepartment of Biodiversity, Ecology and Evolution, Complutense University, Madrid, Spain, jmabril@farm.ucm.esComplutense UniversityMadridSpain
20213006202127172349AFC48-5AFE-5621-B905-B3CBAE7488F20805202110062021Vasco Silva, José Antonio MolinaThis is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
We propose to complete two association names of the class Isoeto-Nanojuncetea by selecting the name-giving taxa according to Art. 40 of the International Code of Phytosociological Nomenclature.
Taxonomic reference: Euro+Med (2021).
binding decisionIsoeto-Nanojunceteanomenclaturephytosociology(1) Request for a binding decision on the name-giving taxon in the name Isoeto longissimae-Cicendietum Br.-Bl. 1967 nom. corr.
Braun-Blanquet (1967: 29) published this Galician-Portuguese syntaxon with only one relevé from Braga (Minho province, Portugal), which is therefore the holotype. The only Isoetes in the original diagnosis is Isoetes velata A. Braun. However, as this is an illegitimate name (Troia and Greuter 2014), the correct name of the name-giving taxon of the association is Isoetes longissima Bory, and the name of the syntaxon must be corrected (Art. 44, Theurillat et al. 2021).
Braun-Blanquet did not indicate from which of the two Cicendia species present in the original diagnosis the association name was formed, C. filiformis or C. pusilla (= Exaculum pusillum; Euro+Med 2021). However, C. filiformis is more abundant in the type relevé (cover-abundance value 1) than C. pusilla (value +). As far as we can ascertain, no other relevés assigned to this association have been published (see, e.g., Brullo and Minissale 1998). Thus, we propose to select Cicendia filiformis as the name-giving taxon.
(2) Request for a binding decision on the name-giving taxon in the name Gnaphalio-Verbenetum supinaeRivas Goday 1970 nom. invers.
Typus: Rivas Goday 1970: 270–271, table 8, rel. 1 (lectotypus designated by Silva et al. 2021: 8).
The provisional community “Gnaphalium luteo-album-Verbena supina” was published by Rivas Goday in Rivas Goday et al. (1956: 370) together with seven relevés. Later, Rivas Goday (1970: 273) validated the syntaxon under the name “Verbeno-Gnaphalietum Rivas Goday 1955”, giving an unambiguous reference to his older work (though with the wrong year 1955; see Izco (1975) for information about the correct publication date) and publishing another table with ten relevés. The only Verbena species in the original diagnosis is V. supina, but there are two species of Gnaphalium: G. luteoalbum and G. uliginosum. Rivas Goday et al. (1956) used G. luteoalbum in the name of their provisional community, and this species is also more frequent and abundant in the original diagnosis than G. uliginosum. We therefore propose to select G. luteoalbum as the name-giving taxon of the Verbeno-Gnaphalietum.
In the type relevé, Verbena supina has a cover-abundance value of 2, whereas G. luteoalbum has a 1 and G. uliginosum a +. Therefore, the name ‘Verbeno-Gnaphalietum’ must be inverted (Arts. 10b and 42, Theurillat et al. 2021). If our proposal is accepted, the correct name of the association will be ‘Gnaphalio luteoalbi-Verbenetum supinaeRivas Goday 1970 nom. invers.’.
Author contributions
Both authors have contributed to the nomenclature research and writing the manuscript.
Acknowledgements
We appreciate the valuable comments and suggestions provided by the editor Wolfgang Willner. We thank Prof. Federico Fernández González (University of Castilla-La Mancha, Spain) for information on the publication date of the Anales del Instituto Botánico A.J. Cavanilles.
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