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Sponge systematics facing new challenges
Cardenas, P.; Perez, T.; Boury-Esnault, N. (2012). Sponge systematics facing new challenges, in: Becerro, M.A. et al. Adv. Mar. Biol. 61: Advances in sponge science: phylogeny, systematics, ecology. Advances in Marine Biology, 61: pp. 79–209. https://dx.doi.org/10.1016/B978-0-12-387787-1.00010-6
In: Becerro, M.A. et al. (2012). Adv. Mar. Biol. 61: Advances in sponge science: phylogeny, systematics, ecology. Advances in Marine Biology, 61. Academic Press: London. ISBN 978-0-12-387787-1. XVIII, 432 pp., meer
In: Advances in Marine Biology. Academic Press: London, New York. ISSN 0065-2881; e-ISSN 2162-5875, meer
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| Trefwoorden |
Biogeny > Phylogeny
Classification
Classification > Cladistics
Calcispongiae [WoRMS]; Demospongiae [WoRMS]; Hexactinellida [WoRMS]; Homoscleromorpha [WoRMS]
Marien/Kust |
| Author keywords |
Integrative taxonomy; PhyloCode; Linnaean system; Calcispongiae |
| Auteurs | | Top |
- Cardenas, P.
- Perez, T.
- Boury-Esnault, N., meer
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| Abstract |
Systematics is nowadays facing new challenges with the introduction of new concepts and new techniques. Compared to most other phyla, phylogenetic relationships among sponges are still largely unresolved. In the past 10 years, the classical taxonomy has been completely overturned and a review of the state of the art appears necessary. The field of taxonomy remains a prominent discipline of sponge research and studies related to sponge systematics were in greater number in the Eighth World Sponge Conference (Girona, Spain, September 2010) than in any previous world sponge conferences. To understand the state of this rapidly growing field, this chapter proposes to review studies, mainly from the past decade, in sponge taxonomy, nomenclature and phylogeny. In a first part, we analyse the reasons of the current success of this field. In a second part, we establish the current sponge systematics theoretical framework, with the use of (1) cladistics, (2) different codes of nomenclature (Phylo-Code vs. Linnaean system) and (3) integrative taxonomy. Sponges are infamous for their lack of characters. However, by listing and discussing in a third part all characters available to taxonomists, we show how diverse characters are and that new ones are being used and tested, while old ones should be revisited. We then review the systematics of the four main classes of sponges (Hexactinellida, Calcispongiae, Homoscleromorpha and Demospongiae), each time focusing on current issues and case studies. We present a review of the taxonomic changes since the publication of the Systema Porifera (2002), and point to problems a sponge taxonomist is still faced with nowadays. To conclude, we make a series of proposals for the future of sponge systematics. In the light of recent studies, we establish a series of taxonomic changes that the sponge community may be ready to accept. We also propose a series of sponge new names and definitions following the PhyloCode. The issue of phantom species (potential new species revealed by molecular studies) is raised, and we show how they could be dealt with. Finally, we present a general strategy to help us succeed in building a Porifera tree along with the corresponding revised Porifera classification. |
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