Ectyonopsis

Ectyonopsis is a genus of demosponges in the family Myxillidae. They are mostly known from the waters surrounding Australia and from the Southern Ocean.[2]

Ectyonopsis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Porifera
Class: Demospongiae
Order: Poecilosclerida
Family: Myxillidae
Genus: Ectyonopsis
Carter, 1883
Type species
Ectyonopsis ramosa
Carter, 1883
Species

See text.

Synonyms[1]
  • Ectyonancora Lévi, 1963
  • Ectyonopis
  • Stelotrochota Bakus, 1966

Description

This species was originally created for Ectyonopsis ramosa, an Australian species with acanthostyles (spiny styles (spicules with end pointed and the other rounded)) and acanthostrongyles (spiny strongyles (megascleres with both ends rounded)) that form a choanosomal isotropic structure.[3] The genus Ectyonancora, which contained two South African species with acanthostyles, acanthostrongyles, ectosomal tornotes (spicules with both ends sharply pointed), and isochelae spicules (spicules with both ends alike) with protruding processes, was later synonymised with this genus.[3]

All the species in this genus share several features. The tornotes are smooth with triangular/sharply pointed ends. Thick, heavily spined styles are isotopically reticulated and are covered by thick acanthostyles. The microscleres are robust isochelae with processes and broad rounded ends.[4]

Species

The following species are recognised: [1]

  • Ectyonopsis flabellata (Lévi, 1963)
  • Ectyonopsis hartmani (Bakus, 1966)
  • Ectyonopsis panis (Boury-Esnault & van Beveren, 1982)
  • Ectyonopsis pluridentata (Lévi, 1963)
  • Ectyonopsis ramosa Carter, 1883
  • Ectyonopsis ruthae (Mothes & Lerner, 1995)
  • Ectyonopsis sigmata Aguilar-Camacho & Carballo, 2012

References
  1. "Ectyonopsis". WoRMS. World Register of Marine Species. Retrieved 28 September 2021.
  2. Łukowiak, Magdalena; Pisera, Andrzej; Schlögl, Ján (2014-09-01). "Bathyal sponges from the late Early Miocene of the Vienna Basin (central Paratethys, Slovakia)". Paläontologische Zeitschrift. 88 (3): 263–277. doi:10.1007/s12542-013-0197-x. ISSN 1867-6812.
  3. Aguilar-Camacho, JM; Carballo, JL (2012). "New and little-known poecilosclerid sponges from the Mexican Pacific Ocean". Zoological Studies. 51 (7): 1139–1153.
  4. Van Soest, Rob W. M. (2002), Hooper, John N. A.; Van Soest, Rob W. M.; Willenz, Philippe (eds.), "Family Myxillidae Dendy, 1922", Systema Porifera: A Guide to the Classification of Sponges, Boston, MA: Springer US, pp. 602–620, doi:10.1007/978-1-4615-0747-5_64, ISBN 978-1-4615-0747-5
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