taxonID	type	description	language	source
03C487C5FFE2ED7AFF9CF89B4851BCB7.taxon	description	Description. A small to medium-sized, freshwater trichodinid: body diameter, 33.9 – 42.3 (38.1 ± 2.5); adhesive disc diameter, 27.7 – 37.0 (32.1 ± 2.6); diameter of denticulate ring, 16.2 – 23.3 (20.4 ± 1.7); width of border membrane, 1.8 – 3.3 (2.9 ± 0.4); denticle number, 23 – 27 (24); number of radial pins per denticle, 8 – 10 (10); denticle span, 8.0 – 10.7 (9.2 ± 0.7); denticle length, 2.8 – 4.7 (3.8 ± 0.6); central zone of adhesive disc dark; blade length, 3.4 – 4.4 (3.8 ± 0.2). Anterior blade margin strongly rounded, curving into very prominent blade apophysis. Distal margin of blade rounded with blade filling most of space between Y-axes. Distal blade margin with strong curve towards blunt and rounded tangent point. Apex of blade not touching Y + 1 axis. Posterior blade margin shallow, becoming deeper towards central part. Section connecting the blade and central part short, but well developed. Central part well developed with rounded tip, fitting tightly into preceding denticle. Central part extending more than halfway to Y- 1 axis. Shape of central part above and below the X-axis very similar. Central part width 1.0 – 1.9 (1.4 ± 0.3). Rays strongly developed, starting more narrow from central part, becoming slightly thicker towards proximal ends. Some rays directed towards center of adhesive disc, some angled slightly anteriorly. Ray apophysis not visible. Ray connection not well developed. Point of ray bluntly and strongly rounded. Ray length 3.5 – 5.1 (4.2 ± 0.4). Ratio of denticle above to denticle below x axis 0.8 – 1. Adoral ciliary spiral makes a turn of 370 – 380 °. Macronucleus horseshoe-shaped, elongated, external diameter is 30.7 – 34.3 (32.5 ± 1.8), distance between ends 6.2 – 7.7 (7.1 ± 0.6). Micronucleus not observed.	en	S. MARCOTEGUI, Paula, Basson, Linda, R. MARTORELLI, Sergio (2016): Trichodinids (Ciliophora) of Corydoras paleatus (Siluriformes) and Jenynsia multidentata (Cyprinodontiformes) from Argentina, with Description of Trichodina corydori n. sp. and Trichodina jenynsii n. sp. Acta Protozoologica 55 (4): 249-257, DOI: 10.4467/16890027AP.16.027.6096, URL: http://dx.doi.org/10.4467/16890027ap.16.027.6096
03C487C5FFE2ED7AFF9CF89B4851BCB7.taxon	materials_examined	Type host: Corydoras paleatus Jenyns, 1842 (Siluriformes: Callichthyidae) Type locality: Samborombón River (Brandsen), Buenos Aires, Argentina (35 ° 10 ′ 39.79 ″ S, 58 ° 15 ′ 29.70 ″ W) Site of infection: gills Type specimens: MLP-Pr 98	en	S. MARCOTEGUI, Paula, Basson, Linda, R. MARTORELLI, Sergio (2016): Trichodinids (Ciliophora) of Corydoras paleatus (Siluriformes) and Jenynsia multidentata (Cyprinodontiformes) from Argentina, with Description of Trichodina corydori n. sp. and Trichodina jenynsii n. sp. Acta Protozoologica 55 (4): 249-257, DOI: 10.4467/16890027AP.16.027.6096, URL: http://dx.doi.org/10.4467/16890027ap.16.027.6096
03C487C5FFE2ED7AFF9CF89B4851BCB7.taxon	etymology	Etymology: The specific epithet “ corydori ” is coined from the name of host species.	en	S. MARCOTEGUI, Paula, Basson, Linda, R. MARTORELLI, Sergio (2016): Trichodinids (Ciliophora) of Corydoras paleatus (Siluriformes) and Jenynsia multidentata (Cyprinodontiformes) from Argentina, with Description of Trichodina corydori n. sp. and Trichodina jenynsii n. sp. Acta Protozoologica 55 (4): 249-257, DOI: 10.4467/16890027AP.16.027.6096, URL: http://dx.doi.org/10.4467/16890027ap.16.027.6096
03C487C5FFE2ED7AFF9CF89B4851BCB7.taxon	discussion	Remarks. Morphological features of specimens found in C. paleatus agree with typical for Paratrichodina. Thus, denticles have well-developed rays, and are wedged together only by central parts, if anterior projection present, is situated near the base of the blade and is not in contact with the notch in the blade of the preceding denticle (Lom 1958, Basson and Van As 1989). Lom and Haldar (1976) state that the upper limits of the adoral cilia in Trichodinella Šrámek-Hušek, 1963, Tripartiella Lom, 1959 and Paratrichodina are 290 °, and the lower limit in Trichodina is 330 °. Nevertheless, the importance of the length of the adoral cilia as a generic characteristic sometimes appears to be less distinct than previously thought. Recently the majority of described species have in effect been classified based on denticle morphology alone (Gaze and Wootten 1999). The adoral spiral in T. corydori n. sp. presents a turn of more than 330 °, which falls in the range for Trichodina. The denticle shape of T. corydori mostly resembles Paratrichodina africana Kazubski and El-Tantawy, 1986 recently reported from wild and farmed Oreochromis niloticus (Linnaeus) in eastern Amazonia, Brazil by Tavares-Dias et al. (2013). However, T. corydori differs from P. africana in the shape of the denticle, some other measurements, as well as the adoral spiral: (1) The new species is larger than P. africana, for example, in the adhesive disc (27.7 – 37.0 vs. 12.2 – 25), and denticulate ring (16.2 – 23.3 vs. 5.7 – 16.5). (2) In the case of the new species, the ray length is similar to blade length, but in the case of P. africana the ray is shorter than the blade. (3) The ray is thicker in the new species than in P. africana. (4) The section connecting the blade and the central part is very short in the new species, but long in P. africana. (5) The morphometric data of the new species also vary when compared to those of P. africana, e. g., blade length (3.4 – 4.4 vs. 1.5 – 3.8), ray length (3.5 – 5.1 vs. 0.5 – 2.1), denticle span (8.0 – 10.7 vs. 2.9 – 5.5). This is the first report of a trichodinid from C. paleatus.	en	S. MARCOTEGUI, Paula, Basson, Linda, R. MARTORELLI, Sergio (2016): Trichodinids (Ciliophora) of Corydoras paleatus (Siluriformes) and Jenynsia multidentata (Cyprinodontiformes) from Argentina, with Description of Trichodina corydori n. sp. and Trichodina jenynsii n. sp. Acta Protozoologica 55 (4): 249-257, DOI: 10.4467/16890027AP.16.027.6096, URL: http://dx.doi.org/10.4467/16890027ap.16.027.6096
03C487C5FFE0ED7DFF9CFE254B63BCF9.taxon	description	(Figs 2 A – B; 4 B) Description. Medium-sized, freshwater trichodinid: body diameter, 49.5 – 69.8 (61.4 ± 6.6); diameter of adhesive disc, 40.5 – 59.9 (51.2 ± 5.8); denticulate ring diameter, 24.6 – 37.8 (32.8 ± 3.8); width of border membrane 4.0 – 5.6 (4.9 ± 0.6); denticle number, 27 – 37 (33); number of radial pins per denticle, 9 – 11 (11); denticle span, 11.1 – 15.3 (13.7 ± 1.1); denticle length, 3.6 – 6.0 (5.2 ± 0.8); centre of adhesive disc clear with clear rounded or slightly notched perimeter containing a few to a large number of dark granules, rarely forming patches; blade length, 5.1 – 6.4 (5.8 ± 0.5). Anterior blade margin slants gradually downwards towards apex, touching Y + 1 axis. Apex rounded. Blade apophysis not visible. Distal blade margin higher than tangent point. Tangent point delicate. Posterior blade margin strongly curved and L-shaped, deepest point on same level as apex. Posterior projection weakly developed, but present. Section connecting blade and central part robust, clearly distinguishable from blade. Central part squat and well developed with rounded tip, fitting tightly into preceding denticle, extends halfway to Y- 1. Central part above and below the X-axis not similar, section above with slanted edge, whilst section below more angular in shape. Central part width is 2.1 – 3.5 (2.8 ± 0.4). Prominent indentation present in lower central part. Section connecting central part and ray very robust. Rays strongly developed, irregular in shape, tapering sharply to a rounded point. Rays prominently curved posteriorly, directed towards Y- 1 axis with ends crossing Y- 1 axis. Ray apophysis not observed. Ray length 3.5 – 6.1 (4.7 ± 0.7). Ratio of denticle above to denticle below x axis more than one (1.2 – 1.3). Nuclear apparatus and adoral cilia not observed.	en	S. MARCOTEGUI, Paula, Basson, Linda, R. MARTORELLI, Sergio (2016): Trichodinids (Ciliophora) of Corydoras paleatus (Siluriformes) and Jenynsia multidentata (Cyprinodontiformes) from Argentina, with Description of Trichodina corydori n. sp. and Trichodina jenynsii n. sp. Acta Protozoologica 55 (4): 249-257, DOI: 10.4467/16890027AP.16.027.6096, URL: http://dx.doi.org/10.4467/16890027ap.16.027.6096
03C487C5FFE0ED7DFF9CFE254B63BCF9.taxon	biology_ecology	Host: Jenynsia multidentata Jenyns, 1842 (Cyprinodontiformes: Anablepidae) Locality: Samborombón River (Brandsen), Buenos Aires, Argentina (35 ° 10 ′ 39.79 ″ S, 58 ° 15 ′ 29.70 ″ W) Site of infection: gills, skin and fins Voucher specimens: MLP-Pr 100	en	S. MARCOTEGUI, Paula, Basson, Linda, R. MARTORELLI, Sergio (2016): Trichodinids (Ciliophora) of Corydoras paleatus (Siluriformes) and Jenynsia multidentata (Cyprinodontiformes) from Argentina, with Description of Trichodina corydori n. sp. and Trichodina jenynsii n. sp. Acta Protozoologica 55 (4): 249-257, DOI: 10.4467/16890027AP.16.027.6096, URL: http://dx.doi.org/10.4467/16890027ap.16.027.6096
03C487C5FFE0ED7DFF9CFE254B63BCF9.taxon	discussion	Remarks. Trichodina cribbi Dove and O’Donoghue, 2005 is characterized by a large circular central inclusion and approximately 28 denticles and with a blade length slightly greater than the ray length. The morphometric characteristics of specimens studied here correspond well with T. cribbi as provided by Dove and O’Donoghue (2005). This species was originally described by Dove and O’Donoghue (2005) from gills of fishes of the Black Mountain Peninsula, Lake Burley, Griffin, and Canber- ra, Australia. Nevertheless, in C. paleatus during this study, T. cribbi was found also on the skin and fins. This is the second report of this species worldwide, the first record from the Americas and from a new posi- tion on the host. The present report also expands on the host range, adding a new host family.	en	S. MARCOTEGUI, Paula, Basson, Linda, R. MARTORELLI, Sergio (2016): Trichodinids (Ciliophora) of Corydoras paleatus (Siluriformes) and Jenynsia multidentata (Cyprinodontiformes) from Argentina, with Description of Trichodina corydori n. sp. and Trichodina jenynsii n. sp. Acta Protozoologica 55 (4): 249-257, DOI: 10.4467/16890027AP.16.027.6096, URL: http://dx.doi.org/10.4467/16890027ap.16.027.6096
03C487C5FFE7ED7CFF65FE584867BAA2.taxon	description	Description. Medium to large freshwater trichodinid: body diameter, 62.6 – 76.3 (65.5 ± 4.5); adhesive disc diameter, 54.6 – 66.9 (57.8 ± 3.9); denticulate ring diameter, 29.9 – 41.5 (34.3 ± 3.6); width of border membrane, 2.8 – 6.7 (4.4 ± 1.2); denticle number, 23 – 26 (25); number of radial pins per denticle, 14 – 16 (16); denticle span, 16.1 – 22.0 (19 ± 2.0); denticle length, 6.2 – 8.4 (6.9 ± 0.6); central zone of adhesive disc dark; blade length, 4.7 – 7.7 (5.9 ± 0.9). Blade large, filling large part of space between Y-axes. Distal blade margin almost parallel to border membrane, where-after it slants sharply towards apex. Tangent point narrow, almost on same level as distal margin. Apex of blade prominent, extending beyond Y-axes and clearly distinguishable from anterior blade margin. Anterior blade margin with a prominent apex that shows a clear notch proximal to apex in most denticles of some specimens. Notch present in all specimens, but not equally prominent in all. Blade apophysis present. Posterior blade margin deeply rounded, mostly L-shaped with deepest point lower or at same level as blade apex. Posterior projection well developed, present in majority of denticles. Section connecting blade and central part robust, indistinguishable from thinnest part of blade. Central part well developed, characteristically squat and short, with broadly rounded point that fits tightly into preceding denticle. Central part extends halfway to Y- 1 axis. Shape of central part above and below X-axis not similar, upper part with indentation, slanting towards posterior projection, with lower portion more angular. Central part, 3.8 – 5.7 (4.3 ± 0.6) wide. Section connecting central part and ray very robust. Ray apophysis present, but weakly developed. Ray base projecting from ray connection very robust. Ray tapers rapidly to a narrow, rounded point. Rays strongly developed and prominent, but show irregularities in shape and in smoothness along their length, as well as in amount of slanting. Some rays prominently slanted posteriorly, others slanted anteriorly, all crossing Y axes (either Y- 1 or Y + 1 respectively), while others are straight, either running along Y-axes or between them. No matter the angle of rays, all are straight, none showing a curved nature. Ray length, 6.8 – 11.5 (8.7 ± 1.6). Ratio of denticle above to denticle below X axis less than 1 (0.66 – 0.69). Macronucleus horseshoe-shaped, external diameter 43.7 – 45.4 (44.5 ± 0.9). Adoral ciliary spiral 380 – 410 °.	en	S. MARCOTEGUI, Paula, Basson, Linda, R. MARTORELLI, Sergio (2016): Trichodinids (Ciliophora) of Corydoras paleatus (Siluriformes) and Jenynsia multidentata (Cyprinodontiformes) from Argentina, with Description of Trichodina corydori n. sp. and Trichodina jenynsii n. sp. Acta Protozoologica 55 (4): 249-257, DOI: 10.4467/16890027AP.16.027.6096, URL: http://dx.doi.org/10.4467/16890027ap.16.027.6096
