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The chromosomes of some dragonflies from the langtang valley central nepal



The chromosomes of some dragonflies from the langtang valley central nepal



Odonatologica 5(4): 347-354



The male germ cell complements of Drepanosticta sp. (Platystictidae), Indolestes cyanea (Sel.) (Lestidae), Anisopleura comes Sel. (Euphaeidae), Neallogaster sp. aff. hermionae (Fraser) (Cordulegasteridae) and Orthetrum japonicum internum McLachl. (Libellulidae) are described. In all of these the chromosome number is n .male. = 13, while a pair of m-elements is lacking in Drepanosticta sp. and in Neallogaster. Except for O. j. internum, none of the species has been previously studied cytologically. I. cyanea is characterized by an extremely large autosome pair (bivalent). The karyotype of A. comes is similar to that of Bayadera indica (Sel.), but differs considerably from the complement of the more primitive member of the family, Epallage fatime (Charp.). Neallogaster sp. is the first cordulegasterid species definitely lacking the m-chromosomes. The latter and Drepanosticta sp. are new to the Nepalese fauna.

Accession: 006614811

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