The taxonomic circumscription of the large and diverse leaf beetle genus Chrysolina Motschulsky is not clear, and its discrimination from the closely related genus Oreina Chevrolat has classically been controversial. In addition, the subgeneric arrangement of the species is unstable, and proposals segregating Chrysolina species into new genera have been recently suggested. In this context, the ...

Japanese populations of the leaf beetle, Chrysolina aurichalcea, have 2 main karyotypes, Type 31 and Type 41, which greatly differ in chromosome number and form. We examined their geographical distribution and reproductive isolation in southern Hokkaido, northern Japan. Type 41 was widely distributed in the survey area, whereas Type 31 was restricted to a narrow portion. A transect across each ...

A new species of the subgenus Timarchoptera genus Chrysolina is described from Russian Far East (Khabarovsk Krai). The found 1500 km east previously known eastern boundary range subgenus. remaining are distributed in Altai, Sayans, Transbaikalia, and N Mongolia. key all subspecies compiled, a distribution map presented.

The leaf-beetle genus Timarcha Latreille comprises about four subgenera, 125 species and 30 subspecies, spread in eastern North America and around the Mediterranean basin. They are absent from Syria, Lebanon, Israel, and Egypt, where very probably European and African species once met, but were eradicated during the Pleistocene desertification. In Libya, it survives along the coast on the weste...

A new species of the genus Chrysolina Motschulsky, 1860 from Nagano Prefecture, Honshu, Japan is described as (Allohypericia) orochi sp. nov. with detailed illustrations male and female genitalia, description larva pupa, record its host plant, Artemisia capillaris Thunberg (Asteraceae). aeruginosa (Faldermann, 1835) excluded Japanese fauna based on revision previously published records.

Two selected examples of PIXE microanalysis in ecophysiology have been shown. Studies of heavy metal distribution in mycorrhizal and nonmycorrhizal roots of Plantago lanceolata showed different mechanisms in filtering of Zn/Pb and Fe/Mn, both enabling plants to cope with metals present in the environment. Studies of the mechanism used by the beetle Chrysolina pardalina to eliminate excessive am...

Biological control agents may have unintended effects on native biota, particularly species that are closely related to the target invader. Here, we explored how Chrysolina quadrigemina, a beetle introduced to control the invasive weed Hypericum perforatum, impacts native H. punctatum in Tompkins County, New York, USA. Using a suite of complementary field surveys and experimental manipulations,...