Turritopsis
genus of cnidarians
Turritopsis is a genus of hydrozoans in the family Oceaniidae.
Species
According to the World Register of Marine Species, this genus includes the following species:
Turritopsis chevalense (Thorneley, 1904) – species inquirenda
Turritopsis dohrnii (Weismann, 1883) also known as the "Benjamin Button jellyfish", or the "immortal jellyfish". It can reverse its life cycle and transform itself back to a polyp.
Turritopsis fascicularis Fraser, 1943
Turritopsis lata Lendenfeld, 1884
Turritopsis minor (Nutting, 1905)
Turritopsis nutricula McCrady, 1857 (several species, including the "immortal jellyfish", were formerly classified as T. nutricula)
Turritopsis pacifica Maas, 1909
Turritopsis pleurostoma (Péron & Lesueur, 1809) – species inquirenda
Turritopsis polycirrha (Keferstein, 1862)
Turritopsis rubra Farquhar, 1895
References
External links
"Turritopsis". National Center for Biotechnology Information (NCBI).
"Turritopsis". The Encyclopedia of Life.
This brief starts where responsible research should: with the source description of “Turritopsis” as genus of cnidarians. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the science & nature register because the source frames it as genus of cnidarians. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Oct 15, 2025. The linked authority identifier is Q3323834. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1904, 1883, 1943 and 1884.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
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Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
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Questions for further research
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This entry incorporates text from “Turritopsis” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.