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Cytogenetic comparison between Terrobittacus implicates and Bittacus planus (Mecoptera: Bittacidae) with some phylogenetic implications

作者:   来源:   发布日期:2017-10-09  浏览次数:

  论文信息:Ying Miao & Bao-Zhen Hua. Cytogenetic comparison between Terrobittacus implicates and Bittacus planus (Mecoptera: Bittacidae) with some phylogenetic implications. Arthropod Systematics & Phylogeny (2017) 75 (2):175-183.

  

  中科院三区,IF = 2.357

  

  论文摘要:Cytogenetic data contribute greatly to taxonomic and phylogenetic analyses in many insect groups. However, such data have been largely neglected in Mecoptera to date. In the present investigation, we compared the meiotic progresses and karyotypes of the hangingflies Terrobittacus implicatus (Huang & Hua, 2006) and Bittacus planus Cheng, 1949(Bittacidae) using C-banding technique and DAPI (4’-6-di-amino-2-phenylindole) and Giemsa staining. The karyotypical analyses show that T. implicatus possesses the highest chromosome number (2n = 41) ever observed in Bittacidae and an asymmetric karyotype with metacentric, submetacentric, subtelocentric and telocentric chromosomes. B. planus has a high diploid number (2n = 35), but a nearly symmetric karyotype with mainly metacentric and submetacentric chromosomes and a subtelocentric pair. Chiasmate meiosis and X0 sex determination mechanism are likely plesiomorphic in Bittacidae. The pronounced variations in cytogenetic traits within and between the genera Terrobittacus Tan & Hua, 2009 and Bittacus Latreille, 1805 suggest that they are substantial traits both for species delimitation and systematic analysis. The potential utilization of cytogenetic data for understanding the phylogeny of Bittacidae is briefly discussed.

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