Pachymatisma johnstonia

Pachymatisma johnstonia is a species of sponge belonging to the family Geodiidae. A species of the north-eastern Atlantic coasts, this is a usually grey encrusting sponge with large prominent oscula and a pale yellow interior. The size and form depends largely on the extent of its exposure to waves. In heavily wave-exposed locations, it is usually small and thin but in more sheltered places can grow to over 50 cm across and 15 cm thick.

Pachymatisma johnstonia
Scientific classification
Kingdom: Animalia
Phylum: Porifera
Class: Demospongiae
Order: Tetractinellida
Family: Geodiidae
Genus: Pachymatisma
Species:
P. johnstonia
Binomial name
Pachymatisma johnstonia
Synonyms
  • Caminus osculosus GrĂ¼be, 1872
  • Halichondria johnstonia Bowerbank in Johnston, 1842

References

  • Pachymatisma johnstonia at World Register of Marine Species
  • Barratt, John H.; Yonge, C. M. (1958). Collins Pocket Guide to the Sea Shore. William Collins, Sons. p. 43.


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