Tettigonia balcanica, a new species from the Balkan Peninsula (Orthoptera, Tettigoniidae)

<em>Tettigonia balcanica</em>, sp. n., discovered in the mountainous regions of the Central, Western and North Balkan Peninsula, is described in this paper. This species has many similarities with <em>T. silana</em> and <em>T.</em> <em>cantans</em>. However, it differs by the song and some morphological characters. Its range differs from that of<em> T. cantans</em>, with which it has been confused so far, but the border between their ranges has yet to be specified

Molecular and classical chromosomal techniques reveal diversity in bushcricket genera of Barbitistini (Orthoptera)

The cytogenetic characteristics of 17 species of bushcricket belonging to eight genera of the tribe Barbitistini were examined by fluorescence in situ hybridization with 18S rDNA and (TTAGGn) telomeric as probes and by C-banding, silver, and fluorochrome staining. These markers were used to understand chromosomal organization and evolutionary relationships between genera or species within the same genus. The number of 18S rDNA clusters per haploid genome that co-localized with active nucleolus organizer regions (NORs) ranged from one to five, with the most common pattern being the presence of one NOR-bearing chromosome. This ribosomal cistron was preferentially located in the paracentromeric region of autosomes and very rarely in the sex chromosome. The results demonstrated coincidence between the localization of major ribosomal genes and active NORs and the position of C-band and GC-rich regions. The rDNA/NOR distribution and the composition of chromosome heterochromatin proved to be good cytogenetic markers for distinguishing species and phylogenetic lines and for understanding the genomic differentiation and evolution of Barbitistini. A comparison of cytogenetic and morphological or behavioral traits suggests that morphological and behavioral specialization in this group was not followed by major karyotype modification (except for Leptophyes). However, the occurrence and distribution of different repetitive DNA sites tends to vary among the taxa. </jats:p

Make EU trade with Brazil sustainable

Cellular mechanisms in basic and clinical gastroenterology and hepatolog