caa a22 4500 388112603 CHVBK 20180307125357.0 cr unu---uuuuu 161130e199901 xx s 000 0 eng 10.1017/S0022149X99000104 doi S0022149X99000104 pii (NATIONALLICENCE)cambridge-10.1017/S0022149X99000104 Karyotypic characterization of Apatemon gracilis [Elektronische Daten] The cytotaxonomical characteristics of parthenitae of Apatemon gracilis (Rudolphi, 1819) Szidat, 1928 were studied using karyometric analysis to extend our knowledge of chromosome morphology and karyosystematics among trematodes. The karyotype, reported here for the first time, consists of ten pairs (2n = 20) of chromosomes divided into two size groups: five pairs of comparatively large and five pairs of small chromosomes. Biarmed chromosomes prevail in the chromosome set. According to centromere index values, chromosome 1 is submetacentric to metacentric, 2 is subtelocentric, 3 and 5 are acrocentric, 4, 9 and 10 are metacentric, 6 is submetacentric and 7 and 8 are submeta-subtelocentric. The small uniarmed B-chromosome was found in the chromosome set of parthenitae of A. gracilis from one snail. Data are discussed with reference to the karyotypes previously described within the Strigeidae. Cambridge University Press Petkevičiūtė R. Institute of Ecology, Lithuanian Academy of Sciences, Akademijos 2, Vilnius 2600, Lithuania Stanevičiūtė G. Institute of Ecology, Lithuanian Academy of Sciences, Akademijos 2, Vilnius 2600, Lithuania Journal of Helminthology Cambridge University Press 73/1(1999-01), 73-77 0022-149X 73:1<73 1999 73 JHL https://doi.org/10.1017/S0022149X99000104 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022149X99000104 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Petkevičiūtė R. Institute of Ecology, Lithuanian Academy of Sciences, Akademijos 2, Vilnius 2600, Lithuania NATIONALLICENCE 700 1- Stanevičiūtė G. Institute of Ecology, Lithuanian Academy of Sciences, Akademijos 2, Vilnius 2600, Lithuania NATIONALLICENCE 773 0- Journal of Helminthology Cambridge University Press 73/1(1999-01), 73-77 0022-149X 73:1<73 1999 73 JHL CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge