Ulmaceae, Cannabaceae e Urticaceae das restingas do estado do Rio de Janeiro

Pederneiras, Leandro Cardoso; Costa, Andrea; Araújo, Dorothy Sue Dunn de; Carauta, Jorge Pedro Pereira

doi:10.1590/2175-7860201162207

Cited by 16 publications

(15 citation statements)

References 8 publications

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“…Cannabaceae se caracteriza por presentar un patrón de venación primaria actinódroma (Martins & Pirani, 2009). El espécimen analizado se asoció a Trema, que se caracteriza por presentar lamina foliar ovada, base asimétrica que puede ser de redondeada a subcordada, margen dentado y serrado, y venación primaria actinódroma (Martins & Pirani, 2009;Pederneiras et al, 2011), y 3-5 pares de nervaduras secundarias, y venas terciarias paralelas, discretas y no muy prominentes (Gentry, 1993). Ecología.…”

Section: Subfamilia Mimosoideae DC 1825unclassified

Paleoflora Cuaternaria de El Anís, norte de los Andes, Venezuela

Santiago¹,

Gaviria²,

Ricardi-Branco³

et al. 2015

Rev. bras. paleontol.

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-QUATERNARY PALEOFLORA FROM EL ANIS, NORTHERN ANDES, VENEZUELA. This work deals with taxonomic and paleoecological aspects based on Quaternary fossil leaves from Venezuela. It is the fi rst of its kind and therefore represents a novelty. The paleofl ora of the El Anís area, Mérida, presents itself as impressions/compressions of fossil angiosperm leaves, this association being very diverse, abundant, and well preserved, what allowed taxonomic treatment. Twentynine taxa were identifi ed belonging to the following families: Aristolochiaceae, Asteraceae, Bignoniaceae, Boraginaceae, Cannabaceae, Campanulaceae, Clusiaceae, Euphorbiaceae, Fabaceae, Loranthaceae, Malvaceae, Melastomataceae, Meliaceae, Menispermaceae, Myrtaceae, Piperaceae, Polygalaceae, Portulacaceae, Sapindaceae and Verbenaceae. Using the nearestliving-relative method on the genera identifi ed in the paleofl ora suggests the presence of a mature ecological unit that marks the transition between humid forest and dry forest, related to a gallery forest, where herbaceous-shrub stratum and other arboreal with climbers can be found. This ecological unit, having developed during the Pleistocene-Holocene, is the fi rst evidence of these vegetal communities during that period in an intermountain valley in the northern Andes.Key words: paleofl ora, Cordillera de Mérida, humid forest, dry forest, gallery forest, Pleistocene-Holocene. RESUMO -O presente trabalho contempla aspectos taxonômicos e paleoecológicos com base em folhas fósseis do Quaternário da Venezuela, constituindo o primeiro de seu tipo, portanto uma novidade. A paleofl ora de El Anís, Mérida, se apresenta como impressões/contraimpressões de folhas fósseis de angiospermas, sendo uma associação muito diversa, abundante e bem preservada, o que permitiu seu tratamento taxonômico. Foram identifi cados 29 táxons pertencentes as seguintes famílias: Aristolochiaceae, Asteraceae, Bignoniaceae, Boraginaceae, Cannabaceae, Campanulaceae, Clusiaceae, Euphorbiaceae, Fabaceae, Loranthaceae, Malvaceae, Melastomataceae, Meliaceae, Menispermaceae, Myrtaceae, Piperaceae, Polygalaceae, Portulacaceae, Sapindaceae e Verbenaceae. Utilizando o método do parente atual mais próximo, para os gêneros identifi cados nesta paleofl ora, se infere a presença de uma unidade ecológica madura que representa a transição entre o bosque úmido e o bosque seco, relacionada a um bosque de galeria, onde se pode apreciar um estrato herbáceo-arbustivo e outro arbóreo com presença de trepadeiras. Esta unidade ecológica, a qual se desenvolveu durante o Pleistoceno-Holoceno, é a primeira evidência destas comunidades vegetais durante esse período em um vale entre montanhas nos Andes do Norte.Palavras-chave: paleofl ora, Cordilheira de Mérida, bosque úmido, bosque seco, bosque de galeria, Pleistoceno-Holoceno.

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Section: Subfamilia Mimosoideae DC 1825unclassified

Paleoflora Cuaternaria de El Anís, norte de los Andes, Venezuela

Santiago¹,

Gaviria²,

Ricardi-Branco³

et al. 2015

Rev. bras. paleontol.

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“…Pereira & Araujo 2000), but surveys focused on particular plant families are still scarce (e.g. Cogliatti-Carvalho et al 2008;Pederneiras et al 2014). When considering the original extent of restinga in the state and the loss of cover due to real estate speculation, there is an urgent need to conserve this ecosystem (Rocha et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Araceae of Grumari restinga: contribution to the conservation of the flora of Rio de Janeiro State, Brazil

et al. 2017

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Th is study surveyed species of the family Araceae in Grumari restinga, located in the metropolitan region of the city of Rio de Janeiro, Brazil. We aimed to: i) eva luate the contribution of a single locality (Grumari restinga) to regional conservation (Rio de Janeiro State) of Araceae; and ii) compare the distribution of species of Araceae among restingas of the state. We calculated the extent of occurrence and the area of occupancy in the entire state for eight species of Araceae found in Grumari,and performed a similarity analysis among restingas. Our data de monstrate that the extent of o ccurrences for Anthurium augustinum, A. coriaceum and A. maricense are infl uenced by Grumari because this area is the boundary of their known distribution in the state. Grumari did not have an infl uence on the distribution of the other studied species. We found Anthurium coriaceum, A. luschnathianum and Philodendron crassinervium to exhibit unusual habits as terrestrial plants in sandy soil. Th e similarity analysis identifi ed six groups of Araceae, four of which are related to the distance from adjacent forests. We demonstrated that this small conservation unit represents a key locality in the preservation of natural populations of species of Araceae in Rio de Janeiro State.

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“…O ovário é súpero, unilocular com óvulo apical. Os frutos podem ser drupa ou sâmara (Pederneiras et al, 2011).…”

Section: Appezzatounclassified

“…Seus representantes são árvores, arvoretas ou subarbustos, dioica, possui caule verrucoso. As estípulas são persistentes e caducas (Pederneiras, 2011). As folhas são lanceoladas, membranáceas, com ápice longo-acuminado, base oblíqua, as margens são serreadas, as nervuras principal e secundária são proeminentes.…”

Section: Espécies Estudadas Foram Estudadas Cinco Espécies: Celtis Puunclassified

Ulmaceae, Cannabaceae e Urticaceae das restingas do estado do Rio de Janeiro

Cited by 16 publications

References 8 publications

Paleoflora Cuaternaria de El Anís, norte de los Andes, Venezuela

Paleoflora Cuaternaria de El Anís, norte de los Andes, Venezuela

Araceae of Grumari restinga: contribution to the conservation of the flora of Rio de Janeiro State, Brazil

Tricomas secretores em espécies de Cannabaceae e Ulmaceae

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