Search results for "Hebe"
showing 10 items of 14 documents
Benthic hydroids (Cnidaria, Hydrozoa) from the Weddell Sea (Antarctica)
2019
Hydrozoans are a conspicuous component of Antarctic benthic communitites. Recent taxonomic effort has led to a substantial increase in knowledge on the diversity of benthic hydroids from some areas of the Southern Ocean, including the Weddell Sea, the largest sea in the Antarctic region. However, the study of many hydrozoan taxa are still pending, and the diversity in this huge region is expected to be higher than currently known. In order to contribute to the knowledge of taxonomy, ecology and distribution of these cnidarians, a study of unpublished material collected by several German Antarctic expeditions aboard the RV Polarstern in the eastern sector of the Weddell Sea has been conducte…
Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa
2017
During the New Zealand BioRoss 2004 survey, with RV Tangaroa , sampling of marine communities on the Ross Sea shelf was undertaken. Samples were obtained employing several sampling gears (Van Veen grab, epibenthic sled, rough bottom trawl, and beam trawl). Among the numerous benthic samples obtained, a large and important collection of hydroids was present. Sixty-one species, four of them new to science ( Monocoryne antarctica sp. nov., Halecium tangaroa sp. nov., Staurotheca gracilis sp. nov. and Symplectoscyphus densus sp. nov.) have been recorded. Oswaldella blanconae sp. nov. is also described. “Anthoathecata” are represented by ten species belonging to the families Bougainvilliidae, Ca…
Sequence and evolution of a hexamerin from the ant Camponotus festinatus.
2000
In the ant Camponotus festinatus, two different hexamerins accumulate stage-specifically during the late larval period and at various times in adults. These hexamerins serve as storage proteins and play important roles in brood nourishment and colony founding. We report an analysis of the cDNA sequence of C. festinatus hexamerin 2 (CfeHex2). The native protein contains 732 amino acids, which are moderately enriched in aromatic amino acids, aspartate and asparagine. Phylogenetic analyses show a close relationship of CfeHex2 to a putative toxin of the braconid wasp, Bracon hebetor. The divergence of Formicidae and Braconidae hexamerins was calculated to have begun 187 MYA, an estimate consist…
Revision ofHalisiphoniaAllman, 1888 (Cnidaria, Hydrozoa, Hebellidae), with comments on its taxonomic position
2006
The deep‐water genus Halisiphonia is reviewed, based on redescriptions of all available type specimens of its species. The genus includes four valid species, H. arctica, H. galatheae, H. megalotheca, and H. nana, and one species inquirenda, H. spongicola, for which the type could not be located.
Two uncommon fungal species from Italy
2019
Mediterranean forests continue to be an inexhaustible reservoir of fungi of considerable ecological and biogeographical interest. In this paper two rare and/or infrequent species are reported. Boletopsis grisea is a threatened species in Europe while H. subtortum is infrequent.
El manuscrito del 'Cancionero de Baena' (PN1) : Descripción codicológica y evolución histórica
2018
The present article attempts to establish as accurately as possible the chronological trajectory of the unique codex of the Cancionero de Baena (PN1 in the Dutton nomenclature). It begins with a detailed examination of the codicological aspects of the manuscript, which serve to date its origin to around 1465. This origin, combined with the historical data, supports a conjecture that the manuscript probably belonged to Gonzalo de Beteta, an official of both Enrique IV and the Catholic Kings. It would have passed from him to his grandson, Jorge de Beteta y Cardenas, who gave it to the Real Biblioteca de El Escorial in 1576. The article then follows the vicissitudes of the manuscript from its …
La letteratura nigeriana in lingua inglese
2020
La tradizione letteraria nigeriana, appropriatasi della lingua del colonizzatore, travalica i confini nazionali, nonché quelli dei cosiddetti studi postcoloniali, percorrendo temi che vanno dalla cosmogonia mitologica all’impatto coloniale, dall’indipendenza alle migrazioni contemporanee. Nonostante sia ampiamente tradotta, in Italia questa produzione letteraria, che pure si è affermata come una delle più ricche del mondo delle lettere in lingua inglese, non è mai stata sistematizzata all’interno di uno studio specifico che ne sottolinei l’aspetto nazionale insieme a quello transnazionale. Questo volume si propone di colmare questo vuoto, contestualizzandola storicamente e culturalmente, sp…
Botanical names in Southern Hemisphere Veronica (Plantaginaceae ): sect. Detzneria , sect. Hebe , and sect. Labiatoides
2007
The classification of the Southern Hemisphere Veronica complex is discussed in the light of recent findings that these segregate genera are nested within the hitherto northern Veronica clade. In order to render Veronica monophyletic, we transfer Chionohehe, Derwentia, Detzneria, Hebe, Hebejeebie, Heliohebe, Leonohebe, and Parahebe to Veronica subgen. Pseudoveronica. Correct names are listed for all species in Veronica subgen. Pseudoveronica, according to the International Code of Botanical Nomenclature. Those species previously included in Derwentia together with other Australian species of Veronica are now classified in Veronica sect. Labiatoides, that in Detzneria is now classified in Ver…
Phylogeny of Veronica in the Southern and Northern Hemispheres based on plastid, nuclear ribosomal and nuclear low-copy DNA
2010
The cosmopolitan and ecologically diverse genus Veronica with approximately 450 species is the largest genus of the newly circumscribed Plantaginaceae. Previous analyses of Veronica DNA sequences were in stark contrast to traditional systematics. However, analyses did not allow many inferences regarding the relationship between major groups identified, hindering further analysis of diversification and evolutionary trends in the genus. To resolve the backbone relationships of Veronica, we added sequences from additional plastid DNA regions to existing data and analyzed matching data sets for 78 taxa and more than 5000 aligned characters from nuclear ribosomal DNA and plastid DNA regions. The…
Isolation and characterization of N transporters putatively involved in the Hebeloma cylindrosporum-Pinus pinaster ectomycorrhizal association
2007
International audience; Studies of nitrogen metabolism in ectomycorrhizas have demonstrated that the fungal symbiont plays a fully integrated role in plant root metabolism and participates actively in the assimilation and transfer of newly absorbed nitrogen compounds by transferring amino acids. In symbiotic associations, such as mycorrhizas, location of the symbiosis ensures that mycelial growth of the fungus into soil provides access to nutrients in the soil solution. Changes in the distribution and activity of membrane-bound transport proteins in response to symbiotic interactions need to be investigated. In recent years several genes from H. cylindrosporum and P. pinaster, putatively in…