Chromosome studies of Leptotrombidium akamushi and L. scutellare (Acari: Trombiculidae) in Japan

The karyotypes of the two main scrub typhus vectors, Leptotrombidium akamushi (Brumpt) and L. scutellare (Nagayo, Miyagawa, Tamiya and Tenjin), in Japan were studied in order to determine the sex mechanism. The mite tritonymph was found the most suitable stage for the chromosome preparations. At thi...

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Bibliographic Details
Published in:International journal of acarology 2005-06, Vol.31 (2), p.171-174
Main Authors: Hoshiba, Hidehiro, Takahashi, Mamoru, Misumi, Hitoko, Urakami, Hiroshi
Format: Article
Language:English
Subjects:
Acari
chigger mites
karyotype
Leptotrombidium
sex determination
Trombiculidae
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Summary:The karyotypes of the two main scrub typhus vectors, Leptotrombidium akamushi (Brumpt) and L. scutellare (Nagayo, Miyagawa, Tamiya and Tenjin), in Japan were studied in order to determine the sex mechanism. The mite tritonymph was found the most suitable stage for the chromosome preparations. At this stage, mitotic cell divisions were found among the spermatogenetic cells in the male, while only mitotic cells were found in the female. Their karyotypes were 2n = 12+XY in L. akamushi and 2n = 14+XY in L. scutellare, respectively.
ISSN:0164-7954
1945-3892
DOI:10.1080/01647950508683669