A5036394802- Insect and Arachnid Ecology and Behavior
- Plant and animal studies
- Collembola Taxonomy and Ecology Studies
- Fossil Insects in Amber
- Insect-Plant Interactions and Control
- Hemiptera Insect Studies
- Insect behavior and control techniques
- Insect and Pesticide Research
- Protist diversity and phylogeny
- Insect Resistance and Genetics
- Plant Reproductive Biology
- Microtubule and mitosis dynamics
- Hymenoptera taxonomy and phylogeny
- Study of Mite Species
- Insect symbiosis and bacterial influences
- Coleoptera Taxonomy and Distribution
- Neurobiology and Insect Physiology Research
- Lepidoptera: Biology and Taxonomy
- Marine Biology and Ecology Research
- Insect Utilization and Effects
- Marine Ecology and Invasive Species
- Insect Pest Control Strategies
- Marine Invertebrate Physiology and Ecology
- Chromosomal and Genetic Variations
- Parasite Biology and Host Interactions
University of Siena
2016-2025
Toscana Life Sciences
2014
Telethon Institute Of Genetics And Medicine
2010
Stockholm University
1995
Wenner-Gren Foundations
1988-1994
University of Milan
1994
University of Warsaw
1992
Centro Ricerche FIAT
1990
Università di Camerino
1980-1987
University of Cambridge
1986
Recent morphological and molecular evidence has changed interpretations of arthropod phylogeny evolution. Here we compare complete mitochondrial genomes to show that Collembola, a wingless group traditionally considered as basal all insects, appears instead constitute separate evolutionary lineage branched much earlier than the separation many crustaceans insects independently adapted life on land. Therefore, taxon Hexapoda, commonly defined include six-legged arthropods, is not monophyletic.
Development of the insect spermatozoon - spermatogenesis fertilizing phylogeny hexapod orders superclass hexapoda class insecta (ectognathous hexapods) subclass apterygota pterygota (introduction) infraclass palaeopter neoptera orthoptera and phasmatodea embioptera, dermapter, plecoptera grylloblattodea hemipteroid (rhynchotoid) hemiptera suborder heteroptera endopterygota (holometabola) order coleoptera mecoptera siphonaptera diptera strepsiptera superorder amphiesmenoptera hymenoptera...
Abstract The olive fly, Bactrocera oleae , is the major pest of olives in most commercial olive‐growing regions worldwide. species abundant Mediterranean basin and has been introduced recently into California Mexico, creating problems for quarantine protection international trade. Here, we use nuclear microsatellite markers mitochondrial sequences to examine history fly range expansion colonization. Sampled populations span current distribution worldwide, including South Central Africa,...
Disease-associated strains of Helicobacter pylori produce a potent toxin that is believed to play key role in peptic ulcer disease man. In vitro the causes severe vacuolar degeneration target cells and has thus been termed VacA (for vacuolating cytotoxin A). Cytotoxic activity associated with > 600-kD protein consisting several copies 95-kD polypeptide undergoes specific proteolytic cleavage after release from bacteria 37- 58-kD fragments. Quick freeze, deep etch electron microscopy...
We present the complete 15,455-nt mitochondrial DNA sequence of springtail Tetrodontophora bielanensis (Arthropoda, Hexapoda, Collembola). The gene content is typical most metazoans, with 13 protein-coding genes (PCGs), 2 encoding for ribosomal RNA subunits, and 22 tRNA genes. nucleotide shows well-known A+T bias insect mtDNA; its lower (72.7%) than that observed in other species, but still higher arthropodan taxa. appears to be uniform across whole molecule, unlike taxa, which show...
The behavior of parental chromosomes during the first mitosis Drosophila simulans zygotes obtained from unidirectional incompatible crosses is described and it demonstrated that condensation chromatin complements was asynchronous. timing paternal appeared to be delayed in these embryos, so condensed maternal entangled prophase-like fibers congressed equatorial plane metaphase spindle. At anaphase migrated opposite poles spindle, whereas lagged midzone This resulted dramatic errors...
The complete sequence of the olive fly (Bactrocera oleae) mitochondrial genome has been determined. Two independent haplotypes, from flies distant geographical origin (Italy and Portugal) were completely sequenced. molecule is 15815 bp long, shows gene content organization typical insects, namely thirteen protein coding genes (PCGs) encoding proteins involved in oxidative phosphorylation, two rRNAs, twenty-two tRNAs a long (949 bp) noncoding region. genomes specimens share same arrangement,...
ABSTRACT The spermatozoa of three genera Protura are unconventional. Two them, Acerentulus and Acerentomon, display hitherto undescribed axoneme patterns: ‘12 + 0 ‘in the former, ‘14 0’ in latter. All doublets devoid arms. third genus, Eosentomon has a disk-shaped spermatozoon, tail. presence such unusual patterns is related to non-motility spermatozoa.
Two unconventional sperm models (all motile) have been studied. The first one has only the outer arm on doublets (the gall midge, Diplolaboncus); second one, a well-developed inner eel, Anguilla). Both are devoid of central tubules and radial spokes. midge yields single electrophoretic band migrating similarly to sea urchin dynein A; major high-molecular-weight is obtained from eel which co-migrates with B. present picture consistent localization in axoneme--namely, an A-like arm, B arm....
Zoraptera are a cryptic and enigmatic group of insects. The species diversity is lower than in almost all other groups Hexapoda, but may be distinctly higher presently known. Several new were described from different regions recently. systematic placement was discussed controversially since the discovered 100 years ago. Affinities with Isoptera Psocoptera earlier studies. A sister relationship Acercaria (Psocodea, Thysanoptera, Hemiptera) proposed by W. Hennig, for first time based on...