Marіño-Pérez, Ricardo, Mayén-Estrada, Rosaura, Dovgal, I. V.
(2010)
Periacineta mexicana n. sp. (Ciliophora, Suctoria, Discophryida), Epizoic on Mexican Backswimmers of the Genus Buenoa (Insecta, Hemiptera, Notonectidae).
J. Eukaryot. Microbiol (57 (5)).
pp. 435-443.
Abstract
A new species of suctorian in the genus Periacineta, epibiotic on aquatic bugs (Hemiptera, Heteroptera, Nepomorpha), is
described on the basis of morphological characteristics of the cell body, lorica, tentacular placement, and stalk, and its 18S rRNA partial
sequence gene. Periacineta mexicana n. sp. is a loricate suctorian with elongate body and rounded apical region; tentacles are distributed
randomly over apical region and not grouped into fascicles. Macronucleus in adult is elongate and located centrally. The suctorian usually
forms closely aggregated pseudocolonies. We provide morphological data based on optical and scanning electron microscopy. A comparison
with similar congeners, and emended diagnosis of the genus Periacineta also are provided. The ciliates were found attached to the
first two pairs of legs of Mexican notonectids Buenoa pallens and Buenoa spp. (backswimmers).
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