First report on the chromosomal analysis of three species of tribe Eristalini (Diptera: Syrphidae) from outer Himalayas, India
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In the present study, the chromosomes of three species of tribe Eristalini (family Syrphidae) were studied for karyotypic details, morphometric data, C-banding and meiosis. Two species Eristalinus laetus and E. obscuritarsis showed 2n = 10 diploid chromosome number and the remaining third species E. obliquus revealed 2n = 12 chromosomes as diploid number. All the three species exhibited XY sex mechanism in males. The morphology of Y chromosome was similar in all the three species studied. C-banding revealed the presence of constitutive heterochromatin at pericentromeric locations and established the euchromatic or heterochromatic nature of sex chromosomes. Meiotic observations included leptotene, pachytene, diplotene, metaphase-II and anaphase-II. The study is useful in chromosomal evolution and in the solution of taxonomic problems within the family Syrphidae.
KeywordsEristalinus Karyotype Chromosomes Leptotene etc.
Thanks are due to Prof. Seema Langer, HOD Zoology, University of Jammu for providing necessary lab facilities.
Compliance with ethical standards
Conflict of interest
The authors declare that there is no conflict of interest.
This article does not contain any studies with human participants or animals performed by any of the authors.
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