Species numbers are increasing rapidly. This is due mostly to taxonomic inflation, where known subspecies are raised to species as a result in a change in species concept, rather than to new discoveries. Yet macroecologists and conservation biologists depend heavily on species lists, treating them as accurate and stable measures of biodiversity. Deciding on a standardized, universal species lis...

Experimental techniques, which are routinely applied in yeast systematics, are currently finding recognition in a growing number of filamentous taxa. Some other biochemical markers have recently been developed in hyphomycete taxonomy. The spectrum of potential criteria now comprises characters of coenzyme-Q systems, secondary metabolites, protein electrophoresis, serology, nuclear (n) DNA/DNA r...

Neonesidea tenera and four new species (N. plumulosa, N. holdeni, N. bacata, N. edentulata) are described from scrapings of spur and groove habitats on French Frigate Shoals and O'ahu, Hawaiian Islands. Some anatomical details have potential taxonomic significance for the genus Neonesidea, including the caudal setae of the carapace, the masticatory apparatus, and the antennal claw.

Levan production by strains of Erwinia herbicola is common, and this property has some taxonomic significance for species differentiation within the "herbicola" group. The extracellular polysaccharide elaborated by strain 403 was characterized by nuclear magnetic resonance spectroscopy and methylation analysis. Results showed it to be a typical bacterial levan.

To cite this Article Siver, Peter A., Lott, Anne M. and Wolfe, Alexander P.(2009) 'Taxonomic significance of asymmetrical helmet and lance bristles in the genus Mallomonas (Synurophyceae) and their discovery in Eocene lake sediments', European Journal of Phycology, 44: 4, 447 — 460, First published on: 21 August 2009 (iFirst) To link to this Article: DOI: 10.1080/09670260902903061 URL: http://d...

BACKGROUND The arthropod class Diplopoda is a mega-diverse group comprising >12,000 described millipede species. The history of taxonomic research within the group is tumultuous and, consequently, has yielded a questionable higher-level classification. Few higher-taxa are defined using synapomorphies, and the practice of single taxon descriptions lacking a revisionary framework has produced man...

Climate warming is predicted to alter species interactions, which could potentially lead to extinction events. However, there is an ongoing debate whether the effects of warming on biodiversity may be moderated by biodiversity itself. We tested warming effects on soil nematodes, one of the most diverse and abundant metazoans in terrestrial ecosystems, along a gradient of environmental complexit...

In Egypt, the seed and pollen grain morphology of genus Tephrosia Pers. were studied using light scanning electron microscopy. Qualitative quantitative characters seeds grains are presented. The data suggest that several morphological can distinguish taxa Tephrosia. Based on UPGMA clustering analysis PCA, three main clades recognized: Clade A comprising T. kassasii, clade B apollinea, purpurea,...