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Phylogeny of Agrodiaetus Hübner 1822 (Lepidoptera: Lycaenidae) inferred from mtDNA sequences of COI and COII and nuclear sequences of EF1-alpha: karyotype diversification and species radiation.

The authors' data indicate that Agrodiaetus is monophyletic, and representatives of the genus Polyommatus (sensu stricto) are the closest relatives.
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Reinforcement of pre-zygotic isolation and karyotype evolution in Agrodiaetus butterflies

It is shown that the sympatric distribution of 15 relatively young sister taxa of Agrodiaetus strongly correlates with differences in male wing colour, and that this pattern is most likely the result of reinforcement.
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Unexpected layers of cryptic diversity in wood white Leptidea butterflies.

It is shown that the so-called 'sibling' Leptidea actually consist of three species, exemplifying how a widespread species can remain unnoticed even within an intensely studied natural model system for speciation.
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DNA barcoding Central Asian butterflies: increasing geographical dimension does not significantly reduce the success of species identification

This study demonstrates that DNA barcoding remains an effective identification tool even when taxa are sampled from a large geographical area, as adding a geographical dimension affects barcode resolution.
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Establishing criteria for higher‐level classification using molecular data: the systematics of Polyommatus blue butterflies (Lepidoptera, Lycaenidae)

It is demonstrated that the concept of a morphological gap may be misleading at the genus level and can produce polyphyletic genera, and it is proposed that recognition of the existence of cryptic genera may be useful in taxonomy.
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KARYOTYPIC DIVERSITY AND SPECIATION IN AGRODIAETUS BUTTERFLIES

Evidence of a direct role for chromosomal rearrangements in the final stages of animal speciation is found, likely to have contributed to the explosive speciation rate observed in Agrodiaetus, 1.6 species per million years.
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Detecting cryptic species in sympatry and allopatry: analysis of hidden diversity in Polyommatus (Agrodiaetus) butterflies (Lepidoptera: Lycaenidae)

This work discovered that P. valiabadi is a triplet of cryptic species, strongly differentiated by their karyotypes and mitochondrial haplotypes, and rearranged the taxonomy of the butterfly species close to Polyommatus (Agrodiaetus) ripartii.
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In the shadow of phylogenetic uncertainty: the recent diversification of Lysandra butterflies through chromosomal change.

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Sex chromatin and sex chromosome systems in nonditrysian Lepidoptera (Insecta)

The data obtained support the hypothesis that the Z/ZZ sex chromosome system, the female heterogamety and the absence of the sex chromatin body in interphase nuclei are ancestral traits in the superorder Amphiesmenoptera.
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Unprecedented within-species chromosome number cline in the Wood White butterfly Leptidea sinapis and its significance for karyotype evolution and speciation

The discovered system represents the first clearly documented case of explosive chromosome number evolution through intraspecific and intrapopulation accumulation of multiple chromosomal changes and may be used as a model system for studying speciation by means of chromosomally-based suppressed recombination mechanisms.
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