Eur. J. Entomol. 111 (2): 303-306, 2014 | 10.14411/eje.2014.023

First cytogenetic study of Coleorrhyncha: Meiotic complement of Xenophyes cascus (Hemiptera: Peloridiidae)

Snejana GROZEVA1, Valentina KUZNETSOVA2, Viktor HARTUNG  3
1 Institute of Biodiversity and Ecosystem Research of Bulgarian Academy of Sciences, Tsar Osvoboditel 1, 1000 Sofia, Bulgaria; e-mail: sgrozeva@gmail.com
2 Zoological Institute of the Russian Academy of Sciences, Universitetskaya nab. 1, 199034 Saint-Petersburg, Russia; e-mail: valentina_kuznetsova@yahoo.com
3 Museum für Naturkunde, Leibniz-Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, Invalidenstrasse 43, 10115 Berlin, Germany; e-mail: Viktor.Hartung@mfn-berlin.de

Cytogenetic information on the hemipteran suborder Coleorrhyncha is here provided for the first time. The New Zealand peloridiid species, Xenophyes cascus Bergroth, 1924 (Hemiptera: Coleorrhyncha: Peloridiidae), was found to display testes with a single follicle each, holokinetic chromosomes (like other Hemiptera), a karyotype of 2n = 26 + X(0) and a single chiasma per bivalent in male meiosis. Comparative analysis of sex chromosome systems in all four hemipteran suborders (Sternorrhyncha, Auchenorrhyncha, Heteroptera and Coleorrhyncha) allowed inference that an X(0) sex determining system was ancestral within the Hemiptera, whilst the XY-system was most likely a derived condition within the Heteroptera.

Keywords: Hemiptera, Coleorrhyncha, Peloridiidae, Xenophyes cascus, meiotic complement, holokinetic chromosomes, male reproductive system

Received: November 25, 2013; Accepted: December 31, 2013; Prepublished online: February 25, 2014; Published: May 5, 2014

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