Eur. J. Entomol. 101 (2): 205-210, 2004

New cytogenetic data on Nabidae (Heteroptera: Cimicomorpha), with a discussion of karyotype variation and meiotic patterns, and their taxonomic significance

Valentina G. KUZNETSOVA1, Snejana GROZEVA2, Seppo NOKKALA3
1 Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, 199034 St. Petersburg, Russia; e-mail: karyo@zin.ru
2 Institute of Zoology, Bulgarian Academy of Sciences, blvd Tsar Osvoboditel 1, 1000 Sofia, Bulgaria; e-mail: sgrozeva@yahoo.com
3 Laboratory of Genetics, Department of Biology, University of Turku, 20014 Turku, Finland; e-mail: seppo.nokkala@utu.fi

As a part of ongoing cytogenetic studies on the bug family Nabidae (Heteroptera), the karyotypes and meiotic patterns of male Nabis (Aspilaspis) viridulus Spinola, 1837, N. (A.) indicus (Stål, 1873) (subfamily Nabinae) and Prostemma guttula (Fabricius, 1787) (subfamily Prostemmatinae) are described.
N. viridulus and N. indicus differ from P. guttula in their chromosome numbers, which are 2n = 32 + XY and 2n = 26 + XY, respectively, and behaviour of the sex chromosomes in male meiosis, which, respectively, show "distance pairing" and "touch-and-go pairing" in spermatocyte metaphase II. The karyotype of 2n = 34 and "touch-and-go pairing" are considered to be plesiomorphic characters in Nabidae. The evolutionary mechanisms that might underlie different chromosome numbers, the taxonomic significance of karyotype variation and the distribution of meiotic patterns in the family, are discussed.

Keywords: Heteroptera, Nabidae, karyotypes, meiosis, evolution, taxonomy, phylogeny

Received: November 26, 2003; Revised: February 25, 2004; Accepted: March 18, 2004; Published: June 25, 2004  Show citation

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KUZNETSOVA, V.G., GROZEVA, S., & NOKKALA, S. (2004). New cytogenetic data on Nabidae (Heteroptera: Cimicomorpha), with a discussion of karyotype variation and meiotic patterns, and their taxonomic significance. EJE, 101(2), 205-210
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