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Booklet 2013

With South America 2011/2013 we present the second volume of the series cactusinhabitat booklet. About two and a half years have passed since the first publication of cactusinhabitat.org (in 2010) and our first booklet, which Gordon Rowley described as: '... stimulating reading and some revolutionary ideas to arouse controversy' (letter, 27 October 2010). Since then cactusinhabitat has been the activity of our lives, and after another year spent in the habitats of South America, we return to devote ourselves exclusively to the elaboration of the data collected. With the 2013 output we present more than 100 new taxa, bringing the total number of species recognized in cactusinhabitat.org to 252 (from the 292 taxa studied in habitat), many of which are accompanied by related comments. The new surveys are documented by more than 4500 photos, in addition to the existing 2000. Although we documented some new genera, the total number we are presenting is still 40, as in the first publication. We have in fact chosen to assimilate some genera in Echinopsis Zuccarini as a consequence of the phylogenetic hypothesis adopted on the basis of the evidence of the latest molecular analyses (Nyffeler & Eggli 2010, 6: 109-149; Schlumpberger & Renner, 2012, 99 (8) 1335-1349). In this regard, we think that the new theories, the new methods and the new techniques are not of use unless the results can be evaluated with an open mind, without which it old ideas that are always lurking are likely to encroach on the space. The subject of the text on taxonomy is time, the master of the lives of every living being. Only the recognition of the importance of an exact chronology of historical events allows us to identify, as the only truth, a phylogenetic system of classification, as an alternative to other methods based on artificial parameters (morphological, typological etc.) Following time's arrow, we analyzed methods and techniques currently in use for the definition of natural (monophyletic) groups in higher taxa, the system based on Hennig simplesiomorphies / synapomorphies, and the choice of specific evolutionary models in the reprocessing of molecular data, e.g. ML and Bayesian analysis, etc. We want to emphasize the importance of the system proposed by Hennig for the definition of the lower taxa (species), the semaphoront figure, and that of accessory science to recognize genetic relationships within a taxonomic system, called 'comparative holomorphy between semaphoronts' (Hennig, 1966, 66-67). In conclusion, our work in habitat led us to prefer the relationships between species rather than separations; relationships also evident in the results of molecular analysis. If there aren’t many taxa or there are, it is a problem of interpretation: If you think of things as being linked together, there are a few; on the other hand, if you think of them as separate, there are many more. (Quoted from: Anceschi & Magli 2013, 11-12)

Cactusinhabitat booklet. South America 2011/2013 is published & distributed by Modo infoshop. The download is entirely free and available here.

 

 

Booklet 2010

The cactusinhabitat booklet series, at its first release South America 2005/2010, responds to the need for a publication that summarizes and completes the major contents of our website, a project that is exclusively devoted to the study of cacti in their habitat. The site (October 2010) features over 2000 photos from our archives, to which we will refer when necessary in the booklet. It results from the research and reflections of the last five years, half of which were spent in South America. The observation of the species in habitat made us aware of the need for a simpler classification system, because neither Backeberg, Ritter & Co.’s, nor the International Cactaceae Systematics Group’s taxonomic interpretation is able to fully clarify the relationships between the species. We cover this subject in chapter 1, A taxonomic approach for a simpler (and more stable) classification of genera and species in the cactus family. Then we explain the lines we followed in treating infraspecific taxa, and we describe our more traditional approach, in terms of taxa removed from the species level, compared to the ICSG’s approach. In-depth comments on some species follow: an article about the correct name of the Discocactus living in Grão Mogol; or the new distribution to assign to Parodia claviceps (F. Ritter) F. H. Brandt and Parodia schumanniana (K. Schumann) F. H. Brandt, etc. Up to now, the site takes into consideration 40 genera and 151 species (of which 32 belong to the genus Parodia). Three new combinations are published here in chapter 4, New combinations in various South American genera. The final comments are devoted to the problem of conservation as well as to our contribution to this delicate and constantly evolving subject. The booklet will follow the site updates with the geographic, conservative and taxonomic novelties which will be highlighted by our surveys of the following journeys. (Quoted from: Anceschi & Magli 2010, 7)

Cactusinhabitat booklet. South America 2005/2010 is published & distributed by Modo infoshop. The download is entirely free and available here.

 

Giovanna Anceschi & Alberto Magli

cactusinhabitat booklet
South America 2011/2013

June 2013


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PDF, 963KB
Giovanna Anceschi & Alberto Magli

cactusinhabitat booklet
South America 2005/2010

October 2010




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PDF, 560KB
corrigenda
December 2010

download PDF, 259 KB