01545nas a2200193 4500008004100000245012700041210006900168300001200237490000800249520089800257100001801155700002001173700002101193700002001214700002701234700002001261700002401281856004601305 1998 eng d00aChromosomes of Phagocata kawakatsui and Bdellocephala annandalei from Lake Biwa-ko in HonshĂș, central Japan0 aChromosomes of iPhagocata kawakatsuii and iBdellocephala annanda a315-3200 v3833 a

Two lake-dwelling species of paludicolen triclads from Lake Biwa-ko (Honsh, Japan) were studied taxonomically and karyologically. (1) Phagocata kawakatsui Okugawa, 1956, is an epigean species usually inhabiting shallow springs and spring-fed streams in Central Japan. In Lake Biwa-ko, animals were obtained from several bottom stations of the littoral area in the southern part of the northern basin (3–70 m in depth). Chromosome numbers and karyotype: 2x=24 (2m+2sm+2sm+2m+2sm+2m+2sm+2m+2m+2sm+2m+2m). The first pair of metacentric chromosomes is very large in size. (2) Bdellocephala annandalei Ijima et Kaburaki, 1916, an endemic species, is distributed widely in the deep areas of the northern basin (30 to over 100 m in depth). Chromosome numbers and karyotype: 2x=28 (2m+2sm+2sm+2sm+2sm+2m+2m+2m+2m+2m+2m+2m+2m+2m) with the first pair of metacentric chromosomes very long.

1 aOki, Iwashiro1 aTamura, Sachiko1 aNishino, Machiko1 aTakai, Masayuki1 aKuznedelov, Konstantin1 aTimoshkin, Oleg1 aKawakatsu, Masaharu uhttp://dx.doi.org/10.1023/A:1003419206539