, Volume 20, Issue 2, pp 143–151 | Cite as

Different lineages of freshwater jellyfishes (Cnidaria, Olindiidae, Craspedacusta) invading Europe: another piece of the puzzle from Sicily, Italy

  • Enrico Schifani
  • Arturo Viviano
  • Roberto Viviano
  • Luigi Naselli-FloresEmail author
  • Federico Marrone
Research paper


Correctly identifying and mapping the distribution patterns of passively dispersing freshwater organisms is an important task to understand the mechanisms through which these organisms move across the world and to counteract the introduction of invasive alien species in a timely way; moreover, in the light of the growing evidence of the pervasiveness of cryptic species and cryptic biological invasions among all animal groups, the use of molecular identification tools is strongly advisable. In this context, we present the first record of the freshwater jellyfish Craspedacusta sowerbii Lankester, 1880 in the Mediterranean island of Sicily, Italy. This invasive species, native to China, was found during a routine survey campaign aimed at assessing the freshwater species richness in the Sicilian region. Individuals were collected in November 2017 and identified to species level through the sequencing of fragments of both mitochondrial and nuclear genes, and their comparison to the sequences available on public databases. The analysis of molecular data proved that the Sicilian population belongs to C. sowerbii s.s., i.e. one of the two major Craspedacusta lineages which have been discovered to have invaded Europe and which were until recently erroneously jointly reported under the binomen Craspedacusta sowerbii. In order to get a clearer picture of the history and patterns of freshwater jellyfish invasion worldwide, the need for molecular identification of all the non-native Craspedacusta populations currently reported as C. sowerbii, and the opportunity of monitoring human-impacted ecosystems is stressed.


Craspedacusta sowerbii (= sowerbyiBiological invasions Invasive species Cryptic invasions 



The authors wish to thank Fabio Stoch (Université Libre de Bruxelles, Belgium) and Valentina Pieri (Università di Parma, Italy) for their help with the identification of some crustacean taxa.

Compliance with ethical standards

Ethical standards

The authors declare that this study complies with the current Italian laws.

Supplementary material

10201_2018_560_MOESM1_ESM.pdf (95 kb)
Supplementary material 1 (PDF 95 kb)


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Copyright information

© The Japanese Society of Limnology 2018

Authors and Affiliations

  1. 1.Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), Section of ZoologyUniversity of PalermoPalermoItaly
  2. 2.PalermoItaly
  3. 3.Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), Section of Botany and Plant EcologyUniversity of PalermoPalermoItaly

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