Pachymatisma johnstonia is a massive sponge which may reach 40 cm in diameter and 10 cm in height. It has rounded margins and elongate lobes with a very smooth surface. Oscules are gathered in linear groups on the top of the lobes. Colour varies from greish white to dark purplish grey. It has a firm rubbery consistency.
Pachymatisma johnstonia is attached to rocks, from swallow waters to depths up to 300 metersin the English Channel, the Atlantic ocean from the North of the British Isles down to Spain and in the Mediterranean Sea.
Source : World Register of Marine Species
Dernière mise à jour 24-11-2022
Animalia (Kingdom)
Porifera (Phylum)
Demospongiae (Class)
Heteroscleromorpha (Subclass)
Tetractinellida (Order)
Astrophorina (Suborder)
Geodiidae (Family)
Erylinae (Subfamily)
Pachymatisma (Genus)
Pachymatisma johnstonia (Species)
Oscule : opening generally quite visible, through which sponges expel water they have filtered to extract food particles.
Text : Wilfried Bay-Nouailhat © 2006 - 2024.
Photos : ©
Wilfried Bay-Nouailhat. Published with his kind permission.
Websites and reference works : Consult bibliography
Image satellite: © Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community.
Données de distribution : Pachymatisma johnstonia (Bowerbank in Johnston, 1842) in GBIF Secretariat (2019). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2024-12-05.
Source : World Register of Marine Species
Dernière mise à jour 24-11-2022
Animalia (Kingdom)
Porifera (Phylum)
Demospongiae (Class)
Heteroscleromorpha (Subclass)
Tetractinellida (Order)
Astrophorina (Suborder)
Geodiidae (Family)
Erylinae (Subfamily)
Pachymatisma (Genus)
Pachymatisma johnstonia (Species)
Oscule : opening generally quite visible, through which sponges expel water they have filtered to extract food particles.
Text : Wilfried Bay-Nouailhat © 2006 - 2024.
Photos : ©
Wilfried Bay-Nouailhat. Published with his kind permission.
Websites and reference works : Consult bibliography
Bay-Nouailhat W., april 2006, Description of Pachymatisma johnstonia, [On line] https://www.european-marine-life.org/02/pachymatisma-johnstonia.php, consulted on 2024 December 05.
Author
Diver - Naturalist
Underwater Photographer
© Mer et littoral 2004-2024 - All rights reserved
The texts and images on this website are not free of rights and cannot be copied and/or used without the agreement of their respective authors.