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Two new genera and species of sponges (Porifera, Demospongiae) without skeleton from a Mediterranean cave
Vacelet, J.; Perez, T. (1998). Two new genera and species of sponges (Porifera, Demospongiae) without skeleton from a Mediterranean cave. Zoosystema 20(1): 5-22
In: Zoosystema. Editions scientifiques du Muséum: Paris. ISSN 1280-9551, more
Peer reviewed article  

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Keywords
    New genera; New species; Myceliospongia araneosa Vacelet & Perez, 1998 [WoRMS]; Porifera [WoRMS]; Thymosia Topsent, 1895 [WoRMS]; Thymosiopsis cuticulatus Vacelet & Perez, 1998 [WoRMS]; MED, France, Provence-Côte d'Azur [Marine Regions]; Marine

Authors  Top 
  • Vacelet, J.
  • Perez, T.

Abstract
    Two new genera and species of Demospongiae are described from a north-western mediterranean littoral cave characterized by cold homothermy, which shelters deep-sea invertebrates. The two new sponges have neither mineral nor fibrous skeleton. Their cytology is described using transmission electron microscopy. Thymosiopsis cuticulatus n.g.n.sp. (Chondrillidae) shares some characters with Thymosia Topsent, but lacks the diagnostic spongin fibres. Myceliospongia araneosa n.g.n.sp. has unusual anatomy, cytology, and mode of growth. No clear relationship with any order of the Demospongiae is indicated and the sponge is classified as incertae sedis within the Demospongiae.

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