Results 41 to 50 of about 286 (125)

A targeted gene phylogenetic framework to investigate diversification in the highly diverse yet geographically restricted red devil spiders (Araneae, Dysderidae)

Cladistics, Volume 40, Issue 6, Page 577-597, December 2024.
ABSTRACT The family Dysderidae is a highly diverse group of nocturnal ground‐dwelling and active‐hunter spiders. Dysderids are mostly restricted to the Western Palearctic, and particularly rich and abundant around the Mediterranean region. Interestingly, the distribution of species richness among its 24 genera and three subfamilies is highly biased—80%
Silvia Adrián‐Serrano, Martina Pavlek, Miquel A. Arnedo   +2 more
wiley   +1 more source

Heterochromatin heteromorphism in Holhymenia rubiginosa (Heteroptera: Coreidae)

European Journal of Entomology, 2008
Heterochromatin is one of the most dynamic components in the genome of species. Previous studies on the heterochromatin content and distribution in Heteroptera (insects with holokinetic chromosomes) have shown that the species belonging to the family ...
María José BRESSA, María José FRANCO, María Ayelén TOSCANI, Alba GRACIELA PAPESCHI   +3 more
doaj   +1 more source

Evidence for TTAGG telomere repeats and rRNA gene clusters in leafhoppers of the genus Alebra (Hemiptera: Auchenorrhyncha: Cicadellidae)

European Journal of Entomology, 2015
The leafhopper genus Alebra Fieber, 1872 comprises a complex of morphologically similar species. The chromosome complements (karyotypes) of five Alebra species, i.e. A. albostriella, A. coryli, A. viridis, A. wahlbergi and a new, yet undescribed species,
Valentina G. KUZNETSOVA, Anna MARYAŃSKA-NADACHOWSKA, Boris ANOKHIN, Dora AGUIN-POMBO   +3 more
doaj   +1 more source

Variability in the karyotypes, testes and ovaries of planthoppers of the families Issidae, Caliscelidae, and Acanaloniidae (Hemiptera: Fulgoroidea)

European Journal of Entomology, 2006
The aim of this study was to obtain information on the karyotypes, testes and ovaries of three fulgoroid families, mainly in the Issidae but also in the Caliscelidae and Acanaloniidae. For the Issidae, the data is for 19 species belonging to 11 genera of
Anna MARYAŃSKA-NADACHOWSKA, Valentina G. KUZNETSOVA, Vladimir M. GNEZDILOV, Sakis DROSOPOULOS   +3 more
doaj   +1 more source

Distribution of 45S rDNA sites in chromosomes of plants: Structural and evolutionary implications

BMC Evolutionary Biology, 2012
Background 45S rDNA sites are the most widely documented chromosomal regions in eukaryotes. The analysis of the distribution of these sites along the chromosome in several genera has suggested some bias in their distribution.
Roa Fernando, Guerra Marcelo
doaj   +1 more source

Karyotype evolution in progress: A new diploid number in Belostoma candidulum (Heteroptera: Belostomatidae) from Argentina leading to new insights into its ecology and evolution

European Journal of Entomology, 2014
A novel chromosome complement (2n = 14 = 12 + XY/XX; male/female sex chromosomes), male meiosis behaviour, heterochromatin characterization, and frequency and distribution of chiasmata are described for the first time in specimens from a natural ...
Mónica G. CHIRINO, María J. BRESSA
doaj   +1 more source

Karyotype and male pre-reductional meiosis of the sharpshooter Tapajosa rubromarginata (Hemiptera: Cicadellidae)

Revista de Biología Tropical, 2011
Cicadellidae in one of the best represented families in the Neotropical Region, and the tribe Proconiini comprises most of the xylem-feeding insects, including the majority of the known vectors of xylem-born phytopathogenic organisms. The cytogenetics of
Graciela R de Bigliardo, Eduardo Gabriel Virla, Sara Caro, Santiago Murillo Dasso   +3 more
doaj   +2 more sources

Autosomal univalents as a common meiotic feature in Jadera haematoloma (Herrich-Schaeffer, 1847) and Jadera sanguinolenta (Fabricius, 1775) (Heteroptera: Rhopalidae: Serinethinae)

European Journal of Entomology, 2001
So far, available cytogenetic data on 24 species of Rhopalidae reveal a male diploid chromosome number of 13, with a pair of m chromosomes and an X0/XX (male/female) sex chromosome determining system.
María José BRESSA, Alba G. PAPESCHI, Liliana MOLA, Marcelo L. LARRAMENDY   +3 more
doaj   +1 more source

Cyperaceae in Mexico: Diversity and distribution

Botan‪ical Sciences, 2018
Background: Cyperaceae, with about 5,500 species and 90 genera worldwide, are the third largest family among Monocots. A unique combination of morphological and karyotypical features, among which stand holokinetic chromosomes, favors a rapid evolution ...
M. Socorro González-Elizondo, Anton A. Reznicek, Jorge A. Tena-Flores   +2 more
doaj   +1 more source

New contributions to the study of Corixoidea: cytogenetic characterization of three species of Sigara from Argentina and the plausible mechanisms of karyotype evolution within Nepomorpha Nuevas contribuciones al estudio de Corixoidea: caracterización citogenética de tres especies de Sigara de Argentina y los posibles mecanismos de evolución del cariotipo en Nepomorpha

Revista de la Sociedad Entomológica Argentina, 2007
Cytogenetic studies in Heteroptera contribute to the analysis of evolutionary trends within the group. Heteroptera are characterized by the possession of holokinetic chromosomes, different sex chromosome mechanisms and a pair of m chromosomes in some ...
María José Bressa, Alba Graciela Papeschi   +1 more
doaj