Systematic Parasitology

, Volume 96, Issue 2, pp 207–232 | Cite as

The re-discovery of Caligus lichiae Brian, 1906 (Copepoda: Caligidae) parasitic on two carangid fishes in the Mediterranean Sea, and the recognition of Caligus aesopus Wilson C. B., 1921 as a junior subjective synonym

  • Argun Akif ÖzakEmail author
  • Yetkin Sakarya
  • Alper Yanar
  • Uğur Özbilen
  • Geoffrey Allan Boxshall


The caligid copepod Caligus lichiae Brian, 1906 is redescribed based on new material collected from the type-host, Lichia amia (Linnaeus), and from a second carangid, Seriola dumerili (Risso), both caught in the Gulf of Iskenderun, Turkey. Key diagnostic characters of both sexes are reported, supported by drawings and scanning electron microscopy images. Despite the commercial importance of its type-host, L. amia, C. lichiae has not been reported since its original description. After detailed comparison with recent descriptions of Caligus aesopus Wilson C. B., 1921, commonly found on S. dumerili, we recognise these two species as conspecific and propose to relegate C. aesopus Wilson C. B., 1921 to a junior subjective synonym of C. lichiae Brian, 1906. Caligus lichiae is a member of the C. confusus group of species and an identification key to species in this group is provided.



We would also like to thank Associate Professor Dr Kasım Ocakoglu, former head of the Advanced Technologies Research & Application Center (MEITAM) of the University of Mersin, Turkey, and Professor Süphan Karaytuğ and Ms Seher Kuru from Mersin University for their administrative and technical support during the SEM.


This research was funded by the Çukurova University academic research projects unit (Project No. FBA-2017-7490)

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.


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© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Department of Fish Diseases and Aquaculture, Faculty of FisheriesUniversity of CukurovaAdanaTurkey
  2. 2.Department of Marine Sciences, Faculty of Marine Sciences and TechnologyIskenderun Technical UniversityIskenderun/HatayTurkey
  3. 3.Life Sciences DepartmentNatural History MuseumLondonUK

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