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Reinstatement of Species Rank forCystoseira bosphoricaSauvageau (Sargassaceae, Phaeophyceae)

Authors: Berov, Dimitar; Ballesteros, Enric; Sales, Marta; Verlaque, Marc;

Reinstatement of Species Rank forCystoseira bosphoricaSauvageau (Sargassaceae, Phaeophyceae)

Abstract

[EN]On the basis of literature data and new morphological and ecological studies, the reinstatement of species rank for the Black Sea endemic species Cystoseira bosphorica is proposed. Previously reduced to a simple form of the Mediterranean endemic species C. crinita, this member of the caespitose Cystoseira group without spinose-like appendages clearly differs from C. crinita by having the axes long with smooth and prominent apices, the branches with numerous and slightly prominent cryptostomates, the aerocysts frequent, large, oval to subconical-broader at the apex, with 2 or more apical outgrowths, and by the receptacles long, cylindrical-tuberculate, simple or bifid, with apices blunt bearing sometimes a short lateral sub-apical spine. The species that shares the greatest number of characters with C. bosphorica is not C. crinita but the Mediterranean endemic species C. barbatula; however, this latter species clearly differs from C. bosphorica by the constant absence of aerocysts, the filiform branches with prominent and spaced cryptostomates, and by the receptacles smaller, compact, simple, humpy and subulate with sometimes 1–2 long lateral spine-like appendages. [FR]Sur la base des données de la littérature et de nouvelles études morphologiques et écologiques, le rétablissement de Cystoseira bosphorica dans son rang d'espèce est proposé. Précédemment réduit à une simple forme de l'espèce endémique méditerranéenne C. crinita, ce représentant du groupe des Cystoseira caespiteuses sans ramule épineux se distingue nettement de C. crinita par ses axes longs à apex saillants et lisses, ses rameaux avec des cryptostomates nombreux et légèrement saillants, ses aérocystes fréquents, grands, ovales à subconiques plus larges à l'apex et avec 2 proliférations apicales ou plus, et par ses réceptacles longs, cylindriques-tuberculés, simples ou bifides, à apex obtus portant parfois une épine subapicale courte. L'espèce qui partage le plus de caractères avec C. bosphorica n'est pas C. crinita mais l'espèce endémique méditerranéenne C. barbatula, cependant cette dernière diffère clairement de C. bosphorica par l'absence constante d'aérocystes, par ses rameaux filiformes à cryptostomates saillants et très espacés et par ses réceptacles plus petits, compacts, simples ou ramifiés, bosselés et subulés, avec parfois 1 à 2 longues épines latérales.

Peer reviewed

Countries
France, Spain
Keywords

[SDE.BE] Environmental Sciences/Biodiversity and Ecology, Black sea, Sargassaceae, Black Sea, Ochrophyta, Cystoseira bosphorica, Bulgarie, Mer Noire, Bulgaria

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
OpenAIRE UsageCountsViews provided by UsageCounts
22
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Top 10%
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34
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