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| Luis Carballo, Jose; Bautista-guerrero, Eric; Cardenas, Paco; Cruz-barraza, Jose Antonio; Aguilar-camacho, Jose Maria. |
| The Thoosidae (Porifera, Demospongiae, Tetractinellida) currently includes the genera Thoosa, Alectona, and Delectona. To this date, molecular data are only available for Alectona. In this study, the phylogenetic affinities of the genera Thoosa and Alectona have been investigated with the species T. mismalolli, T. calpulli, and T. purpurea from the Mexican Pacific using morphology and three molecular loci: the mitochondrial cytochrome oxidase subunit 1 (CO1 mtDNA), 28S rRNA (fragment D2), and 18S rRNA. Morphology and embryology showed that these genera are quite different from the rest of the tetractinellids because larvae of Alectona and Thoosa have unique features in sponges, such as the presence of monaxonic discs in Thoosa and tetraxonic discs in... |
| Tipo: Text |
Palavras-chave: Astrophorina; Molecular markers; Porifera; Systematics; Synapomorphy; Thoosidae. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00688/79996/83503.pdf |
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| Vacelet, Jean; Cardenas, Paco. |
| 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. |
| Tipo: Text |
Palavras-chave: Porifera; New species; Madagascar; Bathyal; Homoplasy. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00688/79995/82965.pdf |
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| Cardenas, Paco; Xavier, Joana R.; Reveillaud, Julie; Schander, Christoffer; Rapp, Hans Tore. |
| Background: The Astrophorida (Porifera, Demospongiae(rho)) is geographically and bathymetrically widely distributed. Systema Porifera currently includes five families in this order: Ancorinidae, Calthropellidae, Geodiidae, Pachastrellidae and Thrombidae. To date, molecular phylogenetic studies including Astrophorida species are scarce and offer limited sampling. Phylogenetic relationships within this order are therefore for the most part unknown and hypotheses based on morphology largely untested. Astrophorida taxa have very diverse spicule sets that make them a model of choice to investigate spicule evolution. Methodology/Principal Findings: With a sampling of 153 specimens (9 families, 29 genera, 89 species) covering the deep- and shallow-waters... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00137/24817/22903.pdf |
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| Dittami, Simon M; Arboleda, Enrique; Auguet, Jean-christophe; Bigalke, Arite; Briand, Enora; Cardenas, Paco; Cardini, Ulisse; Decelle, Johan; Engelen, Aschwin; Eveillard, Damien; Gachon, Claire Mm; Griffiths, Sarah; Harder, Tilmann; Kayal, Ehsan; Kazamia, Elena; Lallier, François H; Media, Monica; Marzinelli, Ezequiel M; Morganti, Teresa; Nunez Pons, Laura; Prado, Soizik; Pintado, José; Saha, Mahasweta; Selosse, Marc-andré; Skillings, Derek; Stock, Willem; Sunagawa, Shinichi; Toulza, Eve; Vorobev, Alexey; Leblanc, Catherine; Not, Fabrice. |
| Host-microbe interactions play crucial roles in marine ecosystems, but we still have very little understanding of the mechanisms that govern these relationships, the evolutionary processes that shape them, and their ecological consequences. The holobiont concept is a renewed paradigm in biology that can help describe and understand these complex systems. It posits that a host and its associated microbiota, living together in a long-lasting relationship, form the holobiont, and have to be studied together, as a coherent biological and functional unit, in order to understand the biology, ecology and evolution of the organisms. Here we discuss critical concepts and opportunities in marine holobiont research and identify key challenges in the field. We... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00480/59209/61904.pdf |
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