Abstract
Four species of Chilean leaf beetles in the subfamily Chrysomelinae have been cytogenetically analyzed, Blaptea elguetai Petitpierre, 2011, Henicotherus porteri Bréthes, 1929 and Jolivetia obscura (Philippi, 1864) show 2n = 28 chromosomes and a 13 + Xyp male meioformula, and Pataya nitida (Philippi, 1864) has the highest number of 2n = 38 chromosomes. The karyotype of Henicotherus porteri is made of mostly small meta/submetacentric chromosomes, and that of Jolivetia obscura displays striking procentric blocks of heterochromatin at pachytene autosomic bivalents using conventional staining. These findings are discussed in relation to previous cytogenetic data and current taxonomy of the subfamily.
Highlights
The subfamily Chrysomelinae is a group of mostly quite large or medium sized leaf beetles mainly distributed in cool and temperate regions of the world, which are composed of 133 genera (Daccordi 1994), and nearly 3000 species worldwide (Farrell 1998; Reid et al 2009)From the cytogenetic standpoints, this subfamily is relatively well-known since nearly 260 taxa and chromosomal races in 38 genera have been surveyed to date (Petitpierre 2011a)
This subfamily is relatively well-known since nearly 260 taxa and chromosomal races in 38 genera have been surveyed to date (Petitpierre 2011a)
Henicotherus porteri, belonging to the same subtribe Entomoscelina as the former (Daccordi 1994), shares again a 2n = 28 (Xyp) diploid number and male sex-chromosome system, and its karyotype is made up of meta/submetacentric chromosomes of small size mostly. These meta/submetacentric chromosome shapes are the prevalent elements in beetle karyotypes (Smith and Virkki 1978; Virkki 1984), and more in the leaf beetles of the subfamily Chrysomelinae too (Petitpierre 2011a)
Summary
The subfamily Chrysomelinae is a group of mostly quite large or medium sized leaf beetles mainly distributed in cool and temperate regions of the world, which are composed of 133 genera (Daccordi 1994), and nearly 3000 species worldwide (Farrell 1998; Reid et al 2009)From the cytogenetic standpoints, this subfamily is relatively well-known since nearly 260 taxa and chromosomal races in 38 genera have been surveyed to date (Petitpierre 2011a). The subfamily Chrysomelinae is a group of mostly quite large or medium sized leaf beetles mainly distributed in cool and temperate regions of the world, which are composed of 133 genera (Daccordi 1994), and nearly 3000 species worldwide (Farrell 1998; Reid et al 2009). In a previous cytogenetic study, we analyzed three Chilean species of Chrysomelinae (Petitpierre and Elgueta 2006), belonging to three of the ten genera so Copyright Eduard Petitpierre, Mario Elgueta. We have here enlarged this research with four additional species and genera from Chile, of which three, Henicotherus Bréthes, 1929, Jolivetia Bechyné, 1946 and Pataya Bechyné, 1946, are endemics for this geographic subregion in the Neotropics (Daccordi 1994), and the fourth, Blaptea Weise, 1915, has only one other species, in Colombia and Brazil (Daccordi 1994, Petitpierre 2011b)
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