The karyotype, C-bands and AgNO3-bands of a lungless salamander from Korea:Onychodactylus fischeri (Boulenger) (Amphibia, Urodela)

Iizuka, Koji; Yazawa, Shogo

doi:10.1007/bf01984959

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…Our present data are not in agreement with all these suggestions, which did not recognize the genus Onychodactylus as a separate lineage. The distinctness of the genus was supported by karyologicall and genome size data (Morescalchi et al, 1979;Olmo, 1983;Kohno et al, 1991;lizuka, Yazawa, 1994;Vinogradov, 1998;Kuro-o et al, 2000;our unpublished data).…”

Section: Taxonomic Valuementioning

confidence: 59%

Variation in number of trunk vertebrae and in count of costal grooves in salamanders of the family Hynobiidae

Litvinchuk

Borkin

2003

CTOZ

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Ten species from five genera of the family Hynobiidae were studied. The number of trunk vertebrae varied between 14 and 21, and the count of costal grooves ranged from 10 to 15. Both the within-species variation and the within-population variation were recorded in some species. In both kinds the values of the coefficient of variation were quite low. In Salamandrella keyserlingii, the south-eastern samples markedly differed from remaining ones. Among the hynobiids, the genus Onychodactylus (both species) and Batrachuperus mustersi have higher number of vertebrae in the anterior part of trunk (5 and 4, respectively, versus 3), and, thus, demonstrated a distinct position. The relation between the number of trunk vertebrae and the count of costal grooves was studied. The variation in number of trunk vertebrae across urodelan families was discussed.

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Section: Taxonomic Valuementioning

confidence: 59%

Variation in number of trunk vertebrae and in count of costal grooves in salamanders of the family Hynobiidae

Litvinchuk

Borkin

2003

CTOZ

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“…The hynobiids are not only the most speciose of these groups but are chromosomally by far the most diverse family in the order Caudata, representing the entire range of chromosome numbers in the highnumber groups. Within the Hynobiidae the largest chromosome number is found in Onychodactylus (2n=78; Figure 1; Iizuka & Yazawa 1994, Green & Sessions 2007, which is also the largest chromosome number of any urodele. Somewhat lower chromosome numbers are found in diverse hynobiid genera, e.g.…”

mentioning

confidence: 97%

Evolutionary cytogenetics in salamanders

Sessions

2008

Chromosome Res

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Salamanders (Amphibia: Caudata/Urodela) have been the subject of numerous cytogenetic studies, and data on karyotypes and genome sizes are available for most groups. Salamanders show a more-or-less distinct dichotomy between families with large chromosome numbers and interspecific variation in chromosome number, relative size, and shape (i.e. position of the centromere), and those that exhibit very little variation in these karyological features. This dichotomy is the basis of a major model of karyotype evolution in salamanders involving a kind of 'karyotypic orthoselection'. Salamanders are also characterized by extremely large genomes (in terms of absolute mass of nuclear DNA) and extensive variation in genome size (and overall size of the chromosomes), which transcends variation in chromosome number and shape. The biological significance and evolution of chromosome number and shape within the karyotype is not yet understood, but genome size variation has been found to have strong phenotypic, biogeographic, and phylogenetic correlates that reveal information about the biological significance of this cytogenetic variable. Urodeles also present the advantage of only 10 families and less than 600 species, which facilitates the analysis of patterns within the entire order. The purpose of this review is to present a summary of what is currently known about overall patterns of variation in karyology and genome size in salamanders. These patterns are discussed within an evolutionary context.

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“…In the other group, only a few blocks of heterochromatin can be observed after CBG treatment, and no distinctive R bands are observed after incorporation of BrdU. This group includes the two species of the genus Onychodactylus [22,24,28]. B. pinchonii seems to belong to the first group, even in the absence of information about R-banding patterns, because multiple bands were observed on the arms of many chromosomes after CBG treatment ( fig.…”

Section: Discussionmentioning

confidence: 99%

Cytogenetic studies of Hynobiidae (Urodela). XIV. Analysis of the chromosome of a Chinese salamander, Batrachuperus pinchonii (David)

Kuro-o

Ikebe

Tamamoto

et al. 1998

CMLS, Cell. Mol. Life Sci.

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The karyotype, C-bands and AgNO3-bands of a lungless salamander from Korea:Onychodactylus fischeri (Boulenger) (Amphibia, Urodela)

Cited by 7 publications

References 16 publications

Variation in number of trunk vertebrae and in count of costal grooves in salamanders of the family Hynobiidae

Variation in number of trunk vertebrae and in count of costal grooves in salamanders of the family Hynobiidae

Evolutionary cytogenetics in salamanders

Cytogenetic studies of Hynobiidae (Urodela). XIV. Analysis of the chromosome of a Chinese salamander, Batrachuperus pinchonii (David)

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