title: Periacineta mexicana n. sp. (Ciliophora, Suctoria, Discophryida), epizoic on Mexican backswimmers of the genus Buenoa (Insecta, Hemiptera, Notonectidae).
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).
authors: Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, México, D F, Mexico.
authors: Ricardo
authors: R
authors: Mariño-Pérez
authors: Rosaura
authors: R
authors: Mayén-Estrada
authors: Igor V
authors: IV
authors: Dovgal
mesh_terms: D000818:Animals; D048429:Cell Size; D016798:Ciliophora / Q000145:classification / Q000166:cytology / Q000235:genetics / Q000302:isolation & purification*; D016054:DNA, Protozoan / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D020062:Heteroptera / Q000469:parasitology*; D008800:Mexico; D008969:Molecular Sequence Data; D010802:Phylogeny
chemical_list: D016054:DNA, Protozoan; D004275:DNA, Ribosomal