- Unravelling host and symbiont phylogenies of halichondrid sponges (Demospongiae, Porifera) using a mitochondrial marker
- Marine Biology
- Volume | Issue number
- 141 | 2
- Number of pages
- Document type
- Faculty of Science (FNWI)
- Institute for Biodiversity and Ecosystem Dynamics (IBED)
We present the first comparative phylogenetic analysis of a selected set of marine sponges and their bacterial associates. The Halichondrida for an important order in demosponge systematics and are of a particular interest due to the production of secondary metabolites. We sequenced a fragment of the cytochrome oxidase subunit 1 (CO1) gene of the sponges and their bacterial associates, compared the reconstructed phylogenies and found evidence for radiation in coevolution. The tree of six host-species associations showed four supported cospeciation events between the sponges and the bacteria. In addition, we present the first gene tree of sponges based on a mitrochondrial marker. The tree showes major congruences with previous morphological studies and suggests the applicability of a mitochondrial marker in sponge molecular systematics.
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