Karyotypes of the genus Lasiochernes (Pseudoscorpiones, Chernetidae) are studied for the first time. The diploid chromosome numbers of males were found to be 2n = 61 in L. pilosus, 2n = 69 in L. siculus and 2n = 73 in L. cretonatus. Karyotypes of all species mainly consist of biarmed chromosomes; the sex chromosome system is XO. Remarkably, the X chromosome displays partial (L. cretonatus), or ...

A total of 6 species of the Pyretophorus (4 species) and Neomyzomyia (2 species) series of the subgenus Cellia of Anopheles were used for metaphase karyotype analysis. Anopheles subpictus and An. vagus exhibit 4 and 2 forms of mitotic karyotypes, respectively, which are attributable to different types of Y chromosomes. Such distinctive mitotic chromosomes may reflect interspecies differences wi...

Dual beam flow cytometry of chromosomes stained with Hoechst 33258 and chromomycin A3 has been proposed as a method for quantitative classification of human chromosomes (bivariate flow karyotyping). In this paper we investigate the sources and magnitudes of variability in the mean fluorescence intensities of each chromosome group resolved in bivariate flow karyotypes and study the impact of thi...

There are 1,111 species of pholcid spiders, of which less than 2% have published karyotypes. Our aim in this study was to determine the karyotypes and sex determination mechanisms of two species of pholcids: Physocyclus mexicanus (Banks, 1898) and Holocnemus pluchei (Scopoli, 1763), and to observe sex chromosome behavior during meiosis. We constructed karyotypes for P. mexicanus and H. pluchei ...

Karyotypes were analyzed by routine Giemsa and quinacrine fluorescence for 16 patients with acute lymphocytic leukemia [ten adults (18 to 51 years) and six children (3 to 15 years)]. Four patients had received previous therapy, but all 16 had active disease when they were first studied. Eight patients (five untreated) had a normal karyotype initially; however, three of these developed a chromos...

Information on karyotypes of several species of Üié frog genera Adenomera and Leptodactylus recently has become available. Bogart (In press) described and figured the karyotypes of 16 species of Leptodactylus and 3 species of Adenomera (reported as the marmoratus group members of the genus Leptodactylus). We have obtained information on the karyotypes of 9 species of Leptodactylus and Vanzolini...

....................................................................................................................................23 Introduction ................................................................................................................................23 Methods .................................................................................................................