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When is an aster not an aster? A new deep-sea Discorhabdella (Demospongiae, Poecilosclerida) with asters, from the Mozambique Channel
IMBE, CNRS, Aix Marseille Univ, Univ Avignon, IRD, Station Marine d’Endoume, Marseille, France.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Farmakognosi. IMBE, CNRS, Aix Marseille Univ, Univ Avignon, IRD, Station Marine d’Endoume, Marseille, France. (Division of Pharmacognosy)ORCID iD: 0000-0003-4045-6718
2018 (English)In: Zootaxa, ISSN 1175-5326, E-ISSN 1175-5334, Vol. 4466, no 1, p. 197-204Article in journal (Refereed) Published
Abstract [en]

Discorhabdella pseudaster n. sp. is an incrusting sponge from the upper bathyal zone of the 'Banc du Geyser', north of Madagascar, Mozambique Channel. This new species is described only from a single specimen but it is remarkable by the presence of spicules similar to euasters, a type of microsclere unknown in Poecilosclerida. These spicules are in fact a new example of homoplasy, being derivatives of the typical Discorhabdella pseudoastrose acanthostyles, which are here reduced to the aster-like tyles. The isochelae with a large lamella on the shaft are also quite unique in Poeciloclerida.

Place, publisher, year, edition, pages
2018. Vol. 4466, no 1, p. 197-204
Keywords [en]
Porifera, new species, Madagascar, bathyal, homoplasy
National Category
Zoology
Identifiers
URN: urn:nbn:se:uu:diva-363436DOI: 10.11646/zootaxa.4466.1.15ISI: 000443110800013OAI: oai:DiVA.org:uu-363436DiVA, id: diva2:1256762
Funder
EU, Horizon 2020, 679849Available from: 2018-10-18 Created: 2018-10-18 Last updated: 2018-11-02Bibliographically approved

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