Turritopsis nutricula

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Turritopsis nutricula
FMIB 40619 Turritopsis nutricula McCr ALateral view of young BLateral view of older specimen CVentral view of young.jpeg

Turritopsis nutricula

Systematics
Class : Hydrozoa
Order : Anthomedusae
Subordination : Filifera
Family : Oceaniidae
Genre : Turritopsis
Type : Turritopsis nutricula
Scientific name
Turritopsis nutricula
McCrady , 1857

Turritopsis nutricula is a Hydrozoen - Art from the genus Turritopsis in the family of oceanidae . Various species of the genus Turritopsis were previouslyassigned to Turritopsis nutricula , including the "immortal jellyfish", which is now considered a separate species, Turritopsis dohrnii .

features

Turritopsis nutricula forms upright, branched hydroid colonies . The polyp heads (hydrant) are spindle-shaped to club-shaped, their thread-like tentacles are irregularly distributed over the body of the hydrant. The cover (periderm) around the stem (hydrocaulus) is two-ply. The Medusa buds ( gonophores ) develop on the stems in a region enveloped with perisarc.

The medusa are up to 6 mm high with 40 to 100 tentacles whose tips can be thickened. The stomach stalk (manubrium) is dull yellow or orange, the ocelles (eyes) are dark brown or orange. The eggs are 0.116 millimeters in diameter.

distribution

Turritopsis nutricula occurs from the tropical to the temperate western Atlantic , the range extends from New England to Brazil . The species is probably not widespread on the coasts of Europe. All well-documented sightings off European coasts were Turritopsis polycirrha or Turritopsis dohrnii . Since many Turritopsis species were viewed as synonyms of Turritopsis nutricula , the species appeared to be around the world. In the meantime, populations previously regarded as intraspecific variations are classified as separate species and the range of Turritopsis nutricula is limited to the western Atlantic.

Way of life

Turritopsis nutricula is sexually separated , the females are oviparous .

Individual evidence

  1. ↑ a b c d e M. P. Miglietta, S. Piraino, S. Kubota, P. Schuchert: Species in the genus Turritopsis (Cnidaria, Hydrozoa): a molecular evaluation . In: Journal of Zoological Systematics and Evolutionary Research . 45, 2007, pp. 11-19. doi : 10.1111 / j.1439-0469.2006.00379.x .
  2. ↑ Turritopsis nutricula at WoRMS (World Register of Marine Species)

Web links

Commons : Turritopsis nutricula  - Collection of images, videos and audio files