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Chatterjee T., Dovgal I. V., Marshall D. J. First report of Acineta tuberosa (Ciliophora) as an epibiont on a sea spider (Pycnogonida) from northwest Borneo (Brunei), with notes on ciliate epibionts on pycnogonids . Biodiversity and Sustainable Development, 2025, vol. 10, no. 3, pp. 3-12. https://doi.org/10.21072/eco.2025.10.3.01

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Abstract

The suctorian Acineta tuberosa Ehrenberg, 1834 is reported from the subtidal zone at Bubut, along the South China Sea coastline of Brunei Darussalam, as an epibiont on the sea spider (Pycnogonida) Hemichela sp. The found ciliate has a stalked, loricate, flattened triangular cell body, rounded macronucleus and capitate tentacles arranged in two fascicles on two wide and short actinophores. The pycnogonid is also reported here as a host of A. tuberosa for the first time. This is also first report of A. tuberosa from the Brunei coastal area. In addition, notes on ciliate epibionts of pycnogonids are given.

Authors

T. Chatterjee

PhD, D. Sc. 

I. V. Dovgal

D. Sc. in Biology, professor, chief researcher 

D. J. Marshall

PhD, professor 

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Funding

The work of the 2nd author (ID) was carried out within the research topic No 124022400148-4 of A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS. The work of 3rd author (DJM) is supported by Universiti Brunei Darussalam grants UBD/RSCH/1.4/FICBF(b)/2021/033.

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