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- W2091588783 abstract "Wing-shaped projections (vanes) of the flagella of choanomeres are documented from the hexactinellid sponge Aphrocallistes vastus. This observation completes the report of such flagellar structures from the major taxa of the Porifera: Demospongiae/Calcarea and Hexactinellida. It thus allows us to assume flagellar vanes being an autapomorphy of the monophylum Porifera. The wing-shaped flagellar vanes of sponge choanomeres often have been compared with appendages of choanoflagellates, e. g. Codosiga, but fundamental differences seem not to allow any homologization of these structures. Only extensive comparative TEM studies on well-fixated tissues, e. g. from fresh water sponges such as Ephydatia, will settle this question. Zusammenfassung Breitflügelige Geiβelanhangsel der Choanomere bei den Porifera und deren mögliche phylogenetiscke Konsequenzen Flügelartige Fortsätze („Fahnen”) an den Geißeln der Choanomere des hexactinelliden Schwammes Aphrocallistes vastus werden vorgestellt. Mit diesem Befund sind derartige Flagellenstrukturen für sämtliche Großtaxa der Porifera dokumentiert, nämlich Demospongiae/Calcarea und Hexactinellida. Wir können sie somit als eine Autapomorphie des Monophylums Porifera postulieren. Die flügelartigen Geißel-Fahnen in Choanomeren der Spongien wurden immer wieder mit Anhängseln bestimmter Choanoflagellaten in Verbindung gebracht, z. B. Codosiga. Aber grundlegende cytologische Unterschiede scheinen kein Homologisieren dieser Strukturen zu erlauben. Um diese Frage endgültig zu klären, sind jedoch umfassende vergleichende Studien an gut fixierten Gewebeproben, zum Beispiel von Süßwassersch wämmen der Gattung Ephydatia erforderlich." @default.
- W2091588783 created "2016-06-24" @default.
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- W2091588783 date "2009-04-27" @default.
- W2091588783 modified "2023-10-17" @default.
- W2091588783 title "The presence of flagellar vanes in choanomeres of Porifera and their possible phylogenetic implications" @default.
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- W2091588783 doi "https://doi.org/10.1111/j.1439-0469.1991.tb00676.x" @default.
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