Netherland Journal of Aquatic Ecology

, Volume 26, Issue 2–4, pp 157–162 | Cite as

Karyotypes of four Diamesinae species (Diptera) from Russia

  • I. E. Kerkis


The first description of the karyotype of four species of theDiamesinae subfamily is presented. The diploid chromosome number was found to be 8 in all the studied species. Judging from the banding pattern, the karyotypes ofPseudodiamesa (Pagastia) orientalis Tshern. andPseudodiamesa (Pagastia) lanceolata are very similar.P. lanceolata differs fromP. orientalis in the presence of two homozygous inversions, of which one involves about half of arm E, and the other located in arm D.Lappodiamesa willasseni Makar. et Kerk. andSympotthastia repentina Makar. are the first karyologically described representatives of the two genera. The karyotype ofL. willasseni has a large spherical chromosome. The karyotypes ofL. willasseni andS. repentina show a characteristic asynaptic region on the polytene chromosomes which is more prominent inS. repentina.


Karyotype analysis polytene chromosomes sister species Pagastia orientalis Pagastia lanceolata Lappodiamesa willasseni Sympotthastia repentina 


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Copyright information

© Netherlands Hydrobiological Society 1992

Authors and Affiliations

  • I. E. Kerkis
    • 1
  1. 1.Institute of Cytology and GeneticsNovosibirsk State UniversityNovosibirskRussia

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