@article {springerlink:10.1007/BF00036366, title = {A review of chromosomal variation in Dugesia japonica and D. ryukyuensis in the Far East}, journal = {Hydrobiologia}, volume = {305}, year = {1995}, note = {10.1007/BF00036366}, pages = {79-84}, publisher = {Springer Netherlands}, abstract = {{The chromosome numbers of Dugesia japonica Ichikawa et Kawakatsu, 1964, are n = 8}}, issn = {0018-8158}, url = {http://dx.doi.org/10.1007/BF00036366}, author = {Tamura, Sachiko and Oki, Iwashiro and Masaharu Kawakatsu} } @article {springerlink:10.1007/BF00036363, title = {Taxonomy and geographical distribution of Dugesia japonica and D. ryukyuensis in the Far East}, journal = {Hydrobiologia}, volume = {305}, year = {1995}, note = {10.1007/BF00036363}, pages = {55-61}, publisher = {Springer Netherlands}, abstract = {

{Dugesia japonica Ichikawa et Kawakatsu, 1964, is a common and polymorphic species of freshwater planarian distributed widely in the Far East. In 1976 the geographic populations were separated into 2 subspecies (D.j.japonica and D.j. ryukyuensis). The taxonomy of this species is reconsidered once again from the morphological, anatomical, histological, and karyological viewpoints. From the result of these studies, D.j. ryukyuensis is elevated to the rank of species: D. ryukyuensis Kawakatsu, 1976. D. japonica (n = 8}

}, issn = {0018-8158}, url = {http://dx.doi.org/10.1007/BF00036363}, author = {Masaharu Kawakatsu and Oki, Iwashiro and Tamura, Sachiko} } @article {97, title = {Chromosomes of Phagocata kawakatsui and Bdellocephala annandalei from Lake Biwa-ko in Honsh{\'u}, central Japan}, journal = {Hydrobiologia}, volume = {383}, number = {1}, year = {1998}, pages = {315-320}, chapter = {315}, abstract = {

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.

}, doi = {10.1023/A:1003419206539}, url = {http://dx.doi.org/10.1023/A:1003419206539}, author = {Oki, Iwashiro and Tamura, Sachiko and Machiko Nishino and Masayuki Takai and Kuznedelov, Konstantin and Timoshkin, Oleg and Masaharu Kawakatsu} } @article {157, title = {A new species of giant planarian from Lake Baikal, with some remarks on character states in the Dendrocoelidae (Platyhelminthes, Tricladida, Paludicola)}, journal = {Hydrobiologia}, volume = {383}, year = {1998}, pages = {69-75}, chapter = {69}, url = {http://www.springerlink.com/content/qw4630080835g466/}, author = {Ronald Sluys and Oleg A. Timoshkin and Masaharu Kawakatsu} }