Author: Ronaldo Viveiros de Sousa
Advisor: Paulo Eduardo Aguiar Saraiva Câmara
Abstract
The Serra do Cipo has attracted the interest of many researchers over
the years because of its unique characteristics, among them, because it
is the site of transition between the Cerrado and Atlantic Forest. The
sampled area of Serra do Cipo in this study is located along the Gallery
Forest córrego Três Pontinhas, coordinates 19°16'00" S and 43°32'49" W,
altitude of 1,188 meters. The objective of this study was to survey the
Division Bryophyta in gallery forest of stream Três Pontinhas in the
National Park of Serra do Cipo, MG. A collection was held during the
month of November 2009. A second collection was conducted in July of
2011, and both samples followed the methodology of collecting random
samples being collected from all visible material. In total 176
herbarium specimens were examined. Were inventoried 15 families, 26
genera, 43 species and 4 varieties. The families with the largest number
of species were: Leucobryaceae (10 species), Sematophyllaceae (9 spp.)
and Calymperaceae (6 spp.). Fissidentaceae had 3 spp., Bryaceae,
Pylaisiadelphaceae, Pottiaceae and Orthotrichaceae had 2 spp. each and
Brachytheciaceae, Cryphaeaceae, Fabroniaceae, Helicophyllaceae,
Hypnaceae, Polytrichaceae and Sphagnaceae had only 1 sp. each family.
Was recorded three new records for the state of Minas Gerais.
Descriptions, keys and illustration are presented.
Language: Portuguese
Published in Institutional Repository of the University of Brasilia: Click here
Monday, August 11, 2014
Wednesday, January 22, 2014
New article published - A Molecular Phylogeny of the Moss Genus Taxithelium (Pylaisiadelphaceae) Based on Plastid, Mitochondrial and Nuclear Markers
Authors: Paulo E.A.S. Câmara, Jonathan Shaw
Abstract
To test infrageneric classification and species delimitation within the pantropical moss genus Taxithelium (Pylaisiadelphaceae), we constructed a molecular phylogeny using three chloroplast loci (trnL, psbT and rps4), three mitochondrial loci (rps3, nad5 and nad4–5) and the nuclear marker ho1. Analyses of each locus separately and in various combinations, all support the monophyly of Taxithelium. Two major clades corresponding to taxonomically recognized subgenera were resolved within the genus. The first clade is composed of at least five smaller groups, four of which only include Southeast Asian plants and one is from the Americas and Africa; the latter is nested within the Southeast Asian groups. The second group appears to have a Southeast Asian origin with two dispersal events into America. Taxithelium is highly variable morphologically and includes plants with pluripapillose leaf cells as well as plants that lack papillae. Our data show that species T. nepalense, T. leptosigmatum, T. concavum, T. instratum, T. lindbergii and T. isocladum are each demonstrably monophyletic. On the other hand, T. planum and T. kerianum as circumscribed today are polyphyletic. The ho1 nuclear locus is used for the first time, with promising results for moss phylogenetic investigation.
Published in Systematic Botany (2013), 38 (4) - Full article: Click here
Abstract
To test infrageneric classification and species delimitation within the pantropical moss genus Taxithelium (Pylaisiadelphaceae), we constructed a molecular phylogeny using three chloroplast loci (trnL, psbT and rps4), three mitochondrial loci (rps3, nad5 and nad4–5) and the nuclear marker ho1. Analyses of each locus separately and in various combinations, all support the monophyly of Taxithelium. Two major clades corresponding to taxonomically recognized subgenera were resolved within the genus. The first clade is composed of at least five smaller groups, four of which only include Southeast Asian plants and one is from the Americas and Africa; the latter is nested within the Southeast Asian groups. The second group appears to have a Southeast Asian origin with two dispersal events into America. Taxithelium is highly variable morphologically and includes plants with pluripapillose leaf cells as well as plants that lack papillae. Our data show that species T. nepalense, T. leptosigmatum, T. concavum, T. instratum, T. lindbergii and T. isocladum are each demonstrably monophyletic. On the other hand, T. planum and T. kerianum as circumscribed today are polyphyletic. The ho1 nuclear locus is used for the first time, with promising results for moss phylogenetic investigation.
Published in Systematic Botany (2013), 38 (4) - Full article: Click here
Saturday, January 4, 2014
New article published - Morphology and development of leaf papillae in the Pilotrichaceae
Authors: Ana Gabriela Duarte-Silva, Micheline Carvalho-Silva, Paulo Eduardo Aguiar Saraiva Câmara
Abstract
Sporophyte morphology has been traditionally used in pleurocarpous moss taxonomy. However, in the Pilotrichaceae gametophytic morphology still holds interesting and under-investigated characters. We investigated in greater depth the morphology and development of leaf papillae in the family and assess their usefulness to infer the family’s evolutionary history. Specimens were observed under the scanning electron microscope and seven morphological kinds of papillae were identified, as well as two different pathways of development. Results suggest that papilla morphology and development are phylogenetically informative in the Pilotrichaceae.
Published in Acta Botanica Brasilica, Vol. 27, No 4 (2013) - Full article: Click here
Abstract
Sporophyte morphology has been traditionally used in pleurocarpous moss taxonomy. However, in the Pilotrichaceae gametophytic morphology still holds interesting and under-investigated characters. We investigated in greater depth the morphology and development of leaf papillae in the family and assess their usefulness to infer the family’s evolutionary history. Specimens were observed under the scanning electron microscope and seven morphological kinds of papillae were identified, as well as two different pathways of development. Results suggest that papilla morphology and development are phylogenetically informative in the Pilotrichaceae.
Published in Acta Botanica Brasilica, Vol. 27, No 4 (2013) - Full article: Click here
Sunday, December 22, 2013
Book: Species muscorum frondosorum (1801)
Author: Johann Hedwig, Christian Friedrich Schwägrichen
Year: 1801 (1° edition)
Language: Latin
The founder of modern bryology, Johannes Hedwig comes into this history because of the fundamental importance of his earlier works. At present his Species Muscorum of 1801 is the starting point for the nomenclature of musci, but this work came out posthumously and contained in fact the result of a lifetime of excellent empirical and observational work.
Hedwig was able to improve his microscope and to achieve magnifications up to 290 times. The work was posthumously edited by C. F. Schwaegrichen, who succeeded Hedwig as professor of Botany and Director of the Botanical Gardens in Leipzig.
Text: Google Books
Available for free at:
Monday, December 16, 2013
Book: Field Guide: Cerrado vegetation - 500 species.
Organizer: João de Deus Medeiros.
Ano: 2011
Language: Portuguese only
The publication provides basic information on 500 species of the Cerrado, including photographs obtained growing in natural conditions, mostly in protected areas. With her visitors of these areas will have an additional stimulus and conditions to observe and admire the beautiful and diverse flora of the Cerrado.
This book is freely available on the Ministry of Environment website: Download here.
Other publications Biodiversity series here.
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