Table 1.

Morphometric data on the Slovak population of Trichodina chlorophora isolated from Physella acuta

Character	Mean	M	SD	SE	CV	Min	Max	n
Body, diameter	50.2	50.2	2.7	0.7	5.5	45.7	54.7	15
Adhesive disc, diameter	45.2	44.6	2.4	0.6	5.4	41.3	48.6	15
Border membrane, width	2.5	2.4	0.4	0.1	15.9	1.9	3.1	15
Exring, diameter	40.1	40.1	2.6	0.7	6.5	36.7	43.9	15
Denticle ring, diameter	28.2	27.9	1.6	0.4	5.5	26.2	30.8	15
Central zone, diameter	17.8	17.5	1.2	0.3	6.5	16.2	19.9	15
Denticle, number	27.5	28.0	1.4	0.4	5.1	26.0	30.0	15
Denticle, length	6.5	6.2	0.7	0.2	10.7	5.7	7.8	15
Denticle, span	11.6	11.7	1.3	0.3	10.8	8.7	13.1	15
Ray, length	4.8	4.7	0.8	0.2	17.5	3.1	6.2	15
Central part of denticle, width	1.6	1.5	0.5	0.1	30.0	1.0	2.7	15
Blade, length	5.2	5.2	0.3	0.1	5.9	4.6	5.8	15
Blade, width	2.8	2.8	0.3	0.1	10.8	2.3	3.2	14
Radial pins per denticle, number	10.1	10.0	0.5	0.1	4.5	9.0	11.0	15
Radial pins, total number	276.9	280.0	14.7	3.8	5.3	252.0	300.0	15
Blade connection, width	0.6	0.6	0.2	0.0	23.5	0.4	0.9	15
Ray connection, width	0.9	0.8	0.2	0.1	25.9	0.4	1.2	15
Denticle above x axis, length	6.0	6.3	0.5	0.1	8.7	4.9	6.6	15
Denticle below x axis, length	5.5	5.9	0.9	0.2	16.0	3.8	6.6	15
Ratio of denticle length above and below x axis	1.1	1.1	0.2	0.0	14.6	0.9	1.4	15

Data based on randomly selected specimens after silver nitrate impregnation. All measurements are in μm

CV coefficient of variation in %, M median, Max maximum, Mean arithmetic mean, Min minimum, n number of individuals investigated, SD standard deviation, SE standard error of arithmetic mean