Hepaticae of Cerro Venamo, Venezuela, collected by J. Steyermark

A revision of herbarium material (NY) from Cerro Venamo, Venezuela (5°59’ N, 61°23’ W, 1890 m) yielded 77 hepatic species in 44 genera and 13 families. Most species have a neotropical distribution (75,32%), 6,49%, are pantropical and 9,09% are reported only from the tepuis

Maidenhair (Adiantum L. - PTERIDACEAE) OF THE MUNICIPALITY ACARÁ, PARÁ, BRASIL

A família Pteridaceae é formada por cerca de 50 gêneros e mais de 950 espécies, é composta por cinco grupos monofiléticos, dentre eles um é formado pelo gênero Adiantum mais as samambaias vitarióides. No Brasil, há diversos estudos que tratam da família e um único estudo exclusivamente para o gênero no Estado do Rio de Janeiro. Portanto, o presente trabalho teve como objetivo realizar o estudo do gênero Adiantum no município de Acará, onde se constatou a ocorrência de oito espécies: Adiantum dolosum, A. glaucescens, A. humile, A. latifolium, A.multisorum, A. paraense, A. terminatum e A.tomentosum. Para este fim, foram elaborada chave de identificação, descrições, ilustrações, padrão de distribuição geográfica, tipos de formas de vida e ambientes de ocorrência.Palavras-chave: samambaias, taxonomia, Amazônia brasileira.The Pteridaceae family includes about 50 genera and over 950 species the family consists of five monophyletic groups that one of these groups is formed by genus Adiantum plus vittarioid ferns. In Brazil are several studies about the family but just one study exclusively for the genus that was realized in Rio de Janeiro State. Therefore, this work aim conduct study of genus Adiantum occurring in the municipality of Acará where was observed eight species: Adiantum dolosum, A. glaucescens, A. humile, A. latifolium, A.multisorum, A. paraense, A. terminatum and A.tomentosum. To this purpose, identification key, descriptions, illustrations, pattern of geographical distribution, types of life forms and environments of occurrence were elaborated.Keywords: ferns; taxonomy; Brazilian amazon

BRIÓFITAS DE UM FRAGMENTO DE FLORESTA OMBRÓFILA ABERTA NO MUNICÍPIO DE PORTO VELHO E NOVAS OCORRÊNCIAS PARA RONDÔNIA, BRASIL

O objetivo deste trabalho foi inventariar as briófitas presentes em um trecho de Floresta Ombrófila Aberta de Terras Baixas na Amazônia Ocidental, localizada no Campus da Universidade Federal de Rondônia. As briófitas foram coletadas dos substratos disponíveis em uma parcela de um hectare dividida em 100 sub-parcelas de 10 x 10 m, tendo sido contemplado apenas o sub-bosque. Foram analisadas 406 amostras que resultaram em 33 táxons (18 hepáticas e 15 musgos). As famílias Lejeuneaceae, Sematophyllaceae e Calymperaceae foram as mais frequentes na área estudada e a predominância destas em Florestas Tropicais vêm sendo amplamente relatada. As espécies generalistas foram as mais representativas (45%), seguidas pelas especialistas de sombra (24%) e de sol (15%). As famílias Plagiochilaceae e Calypogeiaceae são reportadas pela primeira vez para Rondônia, além de 13 novos registros de espécies, sendo elas: Archilejeunea fuscescens (Hampe ex Lehm.) Fulford; Calypogeia laxa Gottsche & Lindenb; Cheilolejeunea aneogyna (Spruce) A. Evans; Cheilolejeunea rigidula (Mont.) R.M.Schust; Cheilolejeunea oncophylla (Aongström) Grolle & E.Reiner; Cololejeunea gracilis (Ast.) Pócs; Cololejeunea subcardiocarpa Tixier; Cololejeunea verwimpii Tixier; Lejeunea caulicalyx (Steph.) E.Reiner & Goda; Lejeunea immersa Spruce; Lejeunea phyllobola Nees & Mont.; Plagiochila raddiana Lindenb.; e Prionolejeunea denticulata (Weber) Schiffn. Os resultados acrescentam dados relevantes ao conhecimento da brioflora local reforçando as indicações de coletas sistematizadas a fim de investigar substratos específicos em inventários futuros.  Palavras-chave: musgos, hepáticas, Rondônia, Amazônia Ocidental. DOI: http://dx.doi.org/10.18561/2179-5746/biotaamazonia.v5n2p71-7

Uma lista das briófitas do Estado do Amapá, norte do Brasil

A checklist is a good base for gathering registers of biodiversity and supporting further studies. The aim of this paper is to present a checklist of the bryophytes from Amapá State, including the distribution data of the species. In total, 174 species (80 mosses and 94 liverworts) in 78 genera and 30 families are registered for Amapá State, northern Brazil, based on examined specimens and on a review of the literature. A table with the species, distribution data for all municipalities of Amapá State, and the first record for all species are presented.Uma lista é uma boa base para reunir registros de biodiversidade e apoiar novos estudos. O objetivo deste artigo é apresentar uma lista de verificação das briófitas do Estado do Amapá, incluindo os dados de distribuição das espécies. No total, 174 espécies (80 musgos e 94 hepáticas) em 79 gêneros e 30 famílias são registradas no Estado do Amapá, norte do Brasil, com base em espécimes examinados e em uma revisão da literatura. Uma tabela com as espécies, dados de distribuição para todos os municípios do Estado do Amapá e o primeiro registro para todas as espécies são apresentados

World checklist of hornworts and liverworts

A working checklist of accepted taxa worldwide is vital in achieving the goal of developing an online flora of all known plants by 2020 as part of the Global Strategy for Plant Conservation. We here present the first-ever worldwide checklist for liverworts (Marchantiophyta) and hornworts (Anthocerotophyta) that includes 7486 species in 398 genera representing 92 families from the two phyla. The checklist has far reaching implications and applications, including providing a valuable tool for taxonomists and systematists, analyzing phytogeographic and diversity patterns, aiding in the assessment of floristic and taxonomic knowledge, and identifying geographical gaps in our understanding of the global liverwort and hornwort flora. The checklist is derived from a working data set centralizing nomenclature, taxonomy and geography on a global scale. Prior to this effort a lack of centralization has been a major impediment for the study and analysis of species richness, conservation and systematic research at both regional and global scales. The success of this checklist, initiated in 2008, has been underpinned by its community approach involving taxonomic specialists working towards a consensus on taxonomy, nomenclature and distribution

Bryophytes de la crête de la montagne Martírios-Andorinhas, une zone de transition Amazonie-Cerrado fortement impactée dans le sud-est du Pará, Brésil

La crête de la montagne Martírios-Andorinhas, dans le sud-est du Pará, est située dans une zone de transition entre deux biomes importants d’Amérique tropicale : l’Amazonie et le Cerrado brésilien. Le but de cette étude était d’étudier la flore des bryophytes dans différentes formations végétales de la crête de Martírios-Andorinhas, afin de contribuer à l’évaluation de l’état de conservation environnementale de la zone. Un total de 1784 spécimens (1093 de mousses, 691 d’hépatiques) ont été collectés, avec une prévalence des mousses sur les hépatiques. En terme de richesse spécifique, cependant, les hépatiques (65 spp.) étaient aussi diverses que les mousses (65). Le nombre de spécimens était plus élevé dans la forêt secondaire (799), suivie de la forêt galerie (670), de la forêt riveraine (208) et de la savane (107). À son tour, en nombre d’espèces, la forêt galerie (88 spp./25 exclusives) a dépassé la forêt secondaire (75/17), la forêt riveraine (64/8) et la savane (32/1). La composition et la richesse des bryophytes reflètent les conditions environnementales de chaque type de végétation. Six espèces sont de nouvelles occurrences pour l’état du Pará, quatre pour la région du nord et une pour le Brésil. La grande majorité (95 %) des espèces étaient déjà répertoriées dans le domaine amazonien, tandis que 76 % étaient connues dans le domaine du Cerrado. Le pourcentage élevé d’espèces enregistrées en Amazonie peut s’expliquer par la présence de forêts humides de plaine dans la zone d’étude, favorisant l’établissement d’espèces amazoniennes dont de nombreuses Lejeuneaceae.The Martírios-Andorinhas Mountain Ridge, in southeastern Pará, is located in a transition zone between two important biomes in Tropical America, Amazonia and the Brazilian Cerrado. The aim of this study was to inventory the bryophyte flora in different vegetation formations of the Martírios-Andorinhas Mountain Ridge, as a contribution to the evaluation of the environmental conservation status of the area. A total of 1784 specimens (1093 of mosses, 691 of liverworts) were gathered, with a prevalence of mosses over liverworts. In terms of species richness, however, liverworts (65 spp.) were as diverse as mosses (65). The number of specimens was higher in secondary forest (799), followed by gallery forest (670), riparian forest (208), and savanna (107). In turn, in number of species, gallery forest (88 spp./25 exclusive) surpassed secondary forest (75/17), riparian forest (64/8), and savanna (32/1). Bryophyte composition and richness reflects the environmental conditions in each vegetation type. Six species are new occurrences for the state of Pará, four for the northern region, and one for Brazil. The great majority (95 %) of the species were already recorded from the Amazonian domain, while 76 % were known from the Cerrado domain. The high percentage of species recorded from Amazonia can be explained by the presence of humid lowland forests in the study area, promoting the establishment of Amazonian species including many Lejeuneaceae.</p