Data/hora: 09/06/2024 16:31:25

Provedor de dados: | 42
País: | Brazil
Título: | The monotypic Brazilian genus Diacrodon is a synonym of Borreria (Spermacoceae, Rubiaceae): morphological and molecular evidences
Autores: | MIGUEL,LAILA M.; SOBRADO,SANDRA V.; JANSSENS,STEVEN; DESSEIN,STEVEN; CABRAL,ELSA L.
Data: | 2018-04-01
Ano: | 2018
Palavras-chave: | Flower; Fruit; ITS-ETS dataset; Morphology; Pollen; Seed.
Resumo: | ABSTRACT Diacrodon is a monotypic genus of the tribe Spermacoceae (Rubiaceae), endemic to northeastern Brazil. Diacrodon compressus is frequently misidentified with a two lobed calyx species of Borreria, B. verticillata. Traditionally, in Spermacoceae the fruit type was considered a diagnostic character among the genera. In this sense, D. compressus presents a strongly compressed, one seeded and indehiscent fruit (vs. globose, two seeded and dehiscent fruit in B. verticillata). In this work, we address two objectives: evaluate the systematic position and determine the identity of Diacrodon in respect to other taxa. Molecular analyses using ITS and ETS indicate that D. compressus is strongly related to other species of Borreria. The morphological results revealed that D. compressus, despite of its type of fruit, is identical to Borreria in floral and palynological features. As conclusion, the new combination Borreria diacrodonta is made and a lectotype is designated. An updated description of the species and a key to the Borreria species with a two lobed calyx are provided. The distribution of B. diacrodonta is extended to Brazilian states Goiás and Minas Gerais, and Paraguay. By this taxonomical change it has become clear that the dehiscence of the fruits lack taxonomic value in the delimitation of Borreria.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401397
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201820170314
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.90 n.2 2018
Fonte: | info:eu-repo/semantics/openAccess