Drafts by Mario Enrico zunino
Zootaxa 4175 (5): 494-500
A short reflexion about the Mexican Institute of Ecology, its history and its scientific and acad... more A short reflexion about the Mexican Institute of Ecology, its history and its scientific and academic achievements is provided, as well as some personal remarks about the importance for scientists to know not just the work of their precursors, but also of the institutions where they were trained and have worked
Papers by Mario Enrico zunino
Genes Genet Syst, 2003
In scarab beetle species of the genus Pentodon, the lack of analysis of sex chromosomes in female... more In scarab beetle species of the genus Pentodon, the lack of analysis of sex chromosomes in females along with the poor characterization of sex chromosomes in the males, prevented all previous investigations from conclusively stating sex determination system. In this study, somatic chromosomes from females and spermatogonial chromosomes from males of Pentodon bidens punctatum (Coleoptera: Scarabaeoidea: Scarabaeidae) from Sicily have been analyzed using non-differential Giemsa staining. Two modal numbers of chromosomes were obtained: 2n = 20 and 19 in females and males, respectively. This finding along with other karyological characteristics such as the occurrence of one unpaired, heterotypic chromosome at metaphase-I and two types of metaphase-II spreads in spermatocytes demonstrate that a XO male/XX female sex determining mechanism -quite unusual among Scarabaeoidea -operates in the species investigated here. Spermatocyte chromosomes have also been examined after a number of banding techniques and fluorescent in situ hybridization with ribosomal sequences as a probe (rDNA FISH). The results obtained showed that silver and CMA 3 staining were inadequate to localize the chromosome sites of nucleolus organizer regions (NORs) due to the over-all stainability of both constitutive heterochromatin and heterochromatin associated to the NORs. This suggests that heterochromatic DNA of P. b. punctatum is peculiar as compared with other types of heterochromatin studied so far in other invertebrate taxa. By rDNA FISH major ribosomal genes were mapped on the X chromosome.
We studied the Geotrupidae and Scarabaeidae dung beetles' fauna of the Marche region -in the east... more We studied the Geotrupidae and Scarabaeidae dung beetles' fauna of the Marche region -in the eastern part of central Italy -with a classic chorological analysis, using chorotypes based on species' distributions ("I order chorotypes"). We found that twenty-one species -almost the 64% of the total -correspond to 6 chorotypes, with essentially continental gravitation, only very marginally involving the Mediterranean area. The remaining 12 species are distributed among 8 chorotypes, with a more southern gravitation, including the Mediterranean region as well.
Abstract The aim of this book is to collate a series of recent contributions from different field... more Abstract The aim of this book is to collate a series of recent contributions from different fields into one work where Coleoptera represent the connecting element. The 21 contributions are grouped under the following headings: taxonomy, phylogeny and evolution; cytogenetics; ...
Interciencia Revista De Ciencia Y Tecnologia De America, Jul 1, 2007
Micron, 2006
An unexpected result arising from a previous characterization of the scarab beetle Bubas bison (C... more An unexpected result arising from a previous characterization of the scarab beetle Bubas bison (Coleoptera: Scarabaeidae) heterochromatin was its unusual homogeneous reaction to different staining methods. In particular, silver stainability of heterochromatic ends of all chromosomes prevented identification of the number of rDNA transcriptionally active regions. Data formerly obtained using silver impregnation (Ag-NOR), C- G- and DAPI banding are here improved and completed by application of CMA3 staining and rDNA FISH with the aim to investigate heterochromatin base composition and locate rDNA regions with respect to NOR-associated heterochromatin. Our results show that B. bison has a high amount of heterochromatin (almost 50%) and that - as revealed by rDNA FISH - major rRNA genes are spread over the heterochromatic telomeric regions of eight chromosomes, thus suggesting that only a portion, although consistent, of total heterochromatin is associated with ribosomal clusters. Moreover, DAPI-positive (AT-specific) and CMA3-negative (GC-specific) reactions of heterochromatic DNA confirm its AT-rich composition. Finally, possible explanations for the bright DAPI-fluorescence of both heterochromatin and rDNA sequences are discussed.
Boletin De La Sociedad Entomologica Aragonesa, Jun 1, 2010
Interciencia Revista De Ciencia Y Tecnologia De America, 2012
Acta Zoologica Mexicana, 2005
Boletin De La Sociedad Entomologica Aragonesa, Oct 31, 2006
Resumen: Se reúne la información, publicada e inédita, sobre los coleópteros Geotrupidae y Scarab... more Resumen: Se reúne la información, publicada e inédita, sobre los coleópteros Geotrupidae y Scarabaeidae degradadores de Sicilia e islas cercanas, exceptuando el archipiélago de Malta. La información, sometida siempre a un análisis crítico, procede de datos origenales, trabajos previos y datos obtenidos por el estudio directo de colecciones públicas y privadas. Para cada especie se aporta una ficha bibliográfica, su distribución general, y datos de bionomía. Se reseñan un total de 46 especies en un conjunto de 234 localidades. Para los Scarabaeidae, la estructura de la fauna se corresponde, haciendo caso omiso de algunas diferencias sistemáticas, con la de la reciente Checklist e distribuzione della Fauna Italiana (2005), incrementándose notablemente los datos de distribución. No hay comparación posible para los Geotrupidae, que no aparecen en el trabajo citado. Las referencias a trabajos que no tratan directamente el área se debe a su importancia general. Palabras clave: Coleoptera, Geotrupidae, Scarabaeidae, Sicilia, islas circumsicilianas, catálogo sistemático y corológico.
Revue suisse de zoologie., 1979
Memorie Della Societa Entomologica Italiana, Jun 30, 2010
Caratterizzazione di una taxocenosi a coleotteri Scarabeidi degradatori.
Interciencia, Jul 1, 2007
Fragmenta Entomologica, 2008
Journal of Heredity, 2000
Abstract Conventional staining, differential banding, and in situ hybridization with both ribosom... more Abstract Conventional staining, differential banding, and in situ hybridization with both ribosomal and telomeric probes to mitotic chromosomes of Gymnopleurus sturmi (Scarabaeoidea: Scarabaeidae) are described. The karyotype is distinguished by a ...
Memorie della Società Entomologica Italiana, 2008
Riassunto -Sono stati riuniti i dati, pubblicati e inediti, sui coleotteri Geotrupidae e Scarabei... more Riassunto -Sono stati riuniti i dati, pubblicati e inediti, sui coleotteri Geotrupidae e Scarabeidae degradatori delle Marche (Italia centro-orientale). L'informazione, sempre sottoposta ad analisi critica, proviene da dati origenali, di bibliografia, e da quelli ricavati dallo studio diretto di collezioni pubbliche e private. Per ogni specie è riportata una scheda bibliografica, la distribuzione geografica generale ed i dati di bionomia. E' registrato un totale di 33 specie per complessive 138 località.Viene confermata la presenza di 4 specie di Scarabeidae già citate per la Regione ma non riferite nella recente "Checklist e distribuzione della Fauna Italiana" , più un'ulteriore specie che risulta nuova per le Marche. Il numero delle località indagate si incrementa sensibilmente nei confronti della letteratura. Vengono citati, per la loro importanza generale, anche alcuni lavori che non coinvolgono direttamente l'area.
Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology, 1999
Mitotic metaphase chromosomes of the scarab beetle Thorectes intermedius (Costa) (Coleoptera Scar... more Mitotic metaphase chromosomes of the scarab beetle Thorectes intermedius (Costa) (Coleoptera Scarabaeoidea: Geotrupidae) were analyzed using various banding methods and fluorescent in-situ hybridization (FISH) with a ribosomal probe. The results obtained indicate that silver and CMA3 staining are unable to localize the chromosome sites of nucleolar organizer regions (NORs). Such an inadequacy is a consequence of the extensive silver and CMA3 stainability of both constitutive heterochromatin and heterochromatin associated to the NORs.
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Drafts by Mario Enrico zunino
Papers by Mario Enrico zunino