02062nas a2200145   4500008004100000245019100041210006900232300001200301490000700313520146600320100003101786700002001817700002701837856005201864       2000                        eng d00aGenetic Divergence of Japanese Turbellarians, Studied by Comparisons of Partial 18S rRNA Gene Sequences. I. On Representatives of Dendrocoelidae (Platyhelminthes: Tricladida: Paludicola)0 aGenetic Divergence of Japanese Turbellarians Studied by Comparis  a491-4960 v173 a<p>This study obtained 18S rDNA sequence data to investigate the extent of genetic divergence in the Japanese dendrocoelid group, and applied the data to the estimation of phylogenetic relationships and taxonomy. The sequence data, consisting of 558 base positions in an aligned data set, were obtained by using the polymerase chain reaction and direct sequencing. For comparative analysis, the 18S rRNA gene sequence data on dendrocoelids from different distant geographical places (Europe, Lake Baikal in Siberia, Kamchatka) published previously were used. Such analysis showed that: (1) Bdellocephala species from Japan, Kamchatka and Lake Baikal are closely related ; (2) Japanese species classified within the genus Dendrocoelopsis do not form a single cluster of closely related organisms; (3) Dendrocoelopsis ichikawai differs minimally from Bdellocephala baicalensis (from Lake Baikal), reliably groups with all Bdellocephala, and should therefore be classed with this genus. Taxonomic conclusions. (1) The genus Dendrocoelopsis should be revised after molecular typification of European and American representatives. (2) The current generic status of D. ichikawai based on the presence of a well-developed penis papilla should be reconsidered. (3) Sequence divergence amongst representatives of B. brunnea indicates that representatives should be closely examined for the presence of morphological characters by which they might be distinguished.</p>
1 aKuznedelov, Konstantin, D.1 aIshida, Sachiko1 aNishitani, Shin-ichiro  uhttps://continenticola.myspecies.info/node/130501149nas a2200157   4500008004100000245013000041210006900171260001200240300001200252490000700264520059800271100002100869700002500890700002400915856005200939       2010                        eng d00aInterspecific variability of telomeric DNA length in some Siberian and endemic Baikal planarians (Plathelminthes, Tricladida)0 aInterspecific variability of telomeric DNA length in some Siberi  c09/2010  a1237-400 v463 a<p>The length of the telomeric DNA in nine species of planarians inhabiting Lake Baikal and one Siberian species from Baikal rivers was determined using Southern hybridization. According to preliminary estimations, it varied in the range of 25-30 kb (Rimacephalus arecepta, Rimacephalus pulvinar, Sorocelis hepatizon, Sorocelis nigrofasciata, Protocotylus sp., Baikalobia guttata, Bdellocephala baikalensis, Phagocata sibirica) and 50 kb (Baikaloplana valida, Baikalobia copulatrix). It is the first estimation of the values of telomeric region lengths for Baikal free-living flat worms.</p>
1 aKoroleva, A., G.1 aKiril’chik, S., V.1 aTimoshkin, Oleg, A.  uhttps://continenticola.myspecies.info/node/1226