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

References

edit
  • 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.