▪ Abstract The Siluro-Devonian primary radiation of land biotas is the terrestrial equivalent of
the much-debated Cambrian “explosion” of marine faunas. Both show the hallmarks of …

A gynostemium, comprising stamen filaments adnate to a syncarpous style, occurs in only
three groups of monocots: the large family Orchidaceae (Asparagales) and two small genera …

Summary 1 In aggregate, past discussions of heterospory and its role in the alternation of
generations are riddled with ambiguities that reflect overlap of terms and concepts …

Internal transcribed spacer (ITS nuclear rDNA) data have been obtained from 190 terrestrial
orchid species, encompassing all genera and the great majority of the widely recognized …

Abstract Hilton j.(School of Geography, Earth and Environmental Sciences, University of
Birmingham, Edgbaston, Birmingham, B15 2TT, UK) and rm Bateman (Natural History …

Minerals and lithofacies are first identified in an interval and then recognized, as a function
of depth, from well log data by a Simulated Neural Network (SNN). The SNN emulates some …

Epigenetic information includes heritable signals that modulate gene expression but are not
encoded in the primary nucleotide sequence. We have studied natural epigenetic variation …

Contents include: 1. Formation evaluation overview. 2. Mud logging. 3. Measurements while
drilling. 4. Coring. 5. Wireline logging operations. 6. The physics of rock/fluid systems. 7 …

Abstract Background and Aims Highly variable, yet possibly convergent, morphology and
lack of sequence variation have severely hindered production of a robust phylogenetic …

This evolutionary cladistic analysis of the arborescent (wood-producing) lycopsids, an
exclusively fossil group of vascular plants, is confined to the strongest available data …