Abstract
The article deals with the data about new find of the rare suctorian species Acineta euchaetae Sewell, 1951 on calanoid copepod host Euchaeta marina (Prestandrea, 1833) from the Arabian Sea. Seven young (sub-adult) individuals of the ciliate were observed on rear part of cephalothorax and on abdomen of adult male of copepod. The data about all known finds of A. euchaetae are discussed as well as the information on different developmental stages of the ciliate species. It is suggested that A. euchaetae is euryhaline species distributed in Eurasian coastal and inland waters and have preference for calanoid copepod hosts, but do not show specificity to any calanoid genus or species. The summarized diagnosis and refined systematic position of A. euchaetae are also provided.
References
Chatterjee, T., Dovgal, I. & Fernandez-Leborans, G. (2021) A checklist of ciliates (Ciliophora) inhabiting on cnidarians. Zootaxa. [in press]
Curds, C.R. (1987) A revision of Suctoria (Ciliophora, Kinetofragminophora ) 5. The Paracineta and Corynophrya problem. Bulletin of the British Museum (Natural History), Zoology Series, 52 (2), 71–106.
Dovgal, I.V. & Kochin, V.A. (1995) Adaptations of the sessile protists to running water factors. Vestnik zoologii, 29 (4), 19–24.
Dovgal, I.V. (2002a) The new record of Acineta euchaetae (Ciliophora, Suctoria) and comments on the species taxonomy. Vestnik zoologii, 36 (6), 73–76.
Dovgal, I.V. (2002b) Evolution, phylogeny and classification of Suctorea (Ciliophora). Protistology, 2 (4), 194–270.
Dovgal, I.V. (2013) Fauna of Ukraine. Vol. 36. Ciliates—Ciliophora. Issue 1. Class Suctorea. Naukova dumka, Kiev, 267 pp. [in Russian with English summary]
Fernandez-Leborans, G. & Tato-Porto, M.L. (2000) Presence of two suctorian species of the genera Acineta and Pelagacineta, epibionts on marine copepod crustaceans. Cytobios, 103, 139–148.
Jankowski, A.V. (1981) New species, genera and families of tentacle infusoria (class Suctoria). Proceedings of Zoological Institute, 107, 80–115.
Morado, J.F. & Small, E.B. (1995) Ciliate parasites and related diseases of Crustacea: a review. Reviews in Fisheries Science, 3 (4), 275–354. https://doi.org/10.1080/10641269509388575
Purushothaman, J., Bhowal A., Siddique, A., Francis, S.V. & Raghunathan, C. (2020) A report on epibionts and new record of two ciliates Ephelota plana and Ephelota gigantea in the coastal waters of Bay of Bengal, Northern Indian Ocean. Symbiosis, 80, 217–230. https://doi.org/10.1007/s13199-019-00659-7
Sahu, G., Panigrahi, S., Mohanty, A.K., Satpathy, K.K. & Dovgal, I. (2017) New record of a protozoan ciliate epibiont, Acineta karamani Hadži 1940 on copepod host Labidocera acuta from the Indian Ocean. Indian Journal of Geo-Marine Sciences, 46 (9), 1802–1805.
Santhakumari, V. (1985) Epizoic and ectoparasitic protozoans from planktonic copepods of the southwest and southeast coasts of India with the description of a new species. Journal of the Marine Biological Association of India, 27 (1 & 2), 29–38.
Sewell, R.B.S. (1951) The epibionts and parasites of the Planktonic Copepoda of the Arabian Sea. The John Murray Expedition1933 -34 Scientific Reports, London, 9 (4), 255–394.