New cytogenetic data on Armenian buprestids (Coleoptera, Buprestidae) with a discussion of karyotype variation within the family

Abstract

As a part of ongoing cytogenetic studies on the jewel-beetles (Buprestidae, Coleoptera) of Armenia, the male karyotypes and meiosis of nine species (5 genera, 4 tribes, 2 subfamilies) are described, figured and discussed. In Ovalisia nadezhdae Sem., Sphenoptera artemisiae Reitt., Coraebus rubi L., C. sinuatus Creutz., Meliboeus caucasicus Reitt., Agrilus angustulus Ill. Men., A. obscuricollis Kiesw., and A. araxenus Khnz. diploid chromosome numbers vary in a narrow range from 20 to 24. In Sph. glabrata Men. a high chromosome number of 2n=40 was discovered. All the species have a XY sex chromosome system, which is however of different types. The data available on the buprestid karyotypes and karyotype variation at different taxonomic levels within the family are discussed.

Cytogenetic characterization of Eurysternus caribaeus (Coleoptera: Scarabaeidae): evidence of sex-autosome fusion and diploid number reduction prior to species dispersion

“…In some Coleopteran families, wide karyotypic structure variation has been reported, as described for Buprestidae (2n = 12 to 2n = 46) and Elateridae (2n = 4 to 2n = 23), whereas karyotypic conservation has been observed in others, such as Lampyridae (2n = 19, XO), and Cantharidae (2n = 13, XO) (Smith and Virkki 1978;Machado et al 2001;Karagyan et al 2004;Dias et al 2007;Schneider et al 2007a). In the insect class, as a whole, there are groups that present modal and conserved diploid number, i.e.…”

Karyotype and sex chromosome differentiation in two Nalassus species (Coleoptera, Tenebrionidae)

“…3b–c). Ring bivalents are frequent among Tenebrionidae, Scarabaeidae, Meloidae, Buprestidae, Curculionidae, Chrysomelidae and Cerambycidae (Petitpierre 1985, Bisoi and Patnaik 1988, Petitpierre and Garneria 2003, Karagyan et al 2004, 2012, Lachowska et al 2004, 2006a, 2006b, Rozek et al 2004, Angus et al 2007, Holecová et al 2008b). During diploten-diakinesis of Nalassus plebejus , in addition to ring and rod bivalents we also observed cross shaped bivalents (Fig.…”

Amplification of repetitive DNA and origin of a rare chromosomal sex bivalent in Deltochilum (Calhyboma) verruciferum (Coleoptera, Scarabaeidae)

“…Despite the large number of species in this group, cytogenetic studies are scarce, and so far around 1% of the representatives of the order have been analyzed, mainly with standard karyotypic analysis. The most common karyotype is 2n = 20,Xy p with biarmed chromosomes, although variation have been observed in a large number of species from different families (Smith and Virkki 1978;Lachowska et al 1998;Karagyan et al 2004;Dias et al 2007;James and Angus 2007;Schneider et al 2007;Cabral-de-Mello et al 2008).…”