Ectyonopsis Explained

Ectyonopsis is a genus of demosponges in the family Myxillidae. They are mostly known from the waters surrounding Australia and from the Southern Ocean.[1]

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.[2] 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.

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.

Species

The following species are recognised: [3]

References

  1. 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. en. 88. 3. 263–277. 10.1007/s12542-013-0197-x. 1867-6812. free.
  2. Aguilar-Camacho. JM. Carballo. JL. 2012. New and little-known poecilosclerid sponges from the Mexican Pacific Ocean. Zoological Studies. 51. 7. 1139–1153.
  3. Ectyonopsis. 169394. 28 September 2021.