INVESTIGADORES
SOBRADO sandra virginia
congresos y reuniones científicas
Título:
The monotypic Brazilian genus Diacrodon is a synonym of Borreria (Spermacoceae, Rubiaceae): morphological and molecular evidences
Autor/es:
LAILA M. MIGUEL; JANSSENS, STEVEN; SANDRA V. SOBRADO; STEVEN DESSEIN; ELSA L. CABRAL
Lugar:
Copenhagen
Reunión:
Conferencia; VII International Rubiaceae and Gentianales Conference; 2017
Institución organizadora:
Natural History Museum of Denmark
Resumen:
Diacrodon is a monotypic genus of the tribe Spermacoceae (Rubiaceae), which isendemic to Brazil. The name of the only species Diacrodon compressus refers to the strongly compressed, one seeded and indehiscent fruit. This fruit type wasconsidered enough to describe Diacrodon as a different genus in the tribeSpermacoceae, but its author Sprague recognized the similarity with Borreriaverticillata. In the present study, we discuss and illustrate the morphology offlowers, fruits, seeds and pollen grains of Diacrodon and the two most similarspecies of Borreria. Morphological comparisons revealed that Diacrodoncompressus is not significantly different from Borreria verticillata and B. spinosa. Additionally, a molecular phylogenetic study was made, using ITS and ETS dataset, to determine the position of Diacrodon in respect to other genera of Spermacoceae tribe. Diacrodon compressus appears strongly related to another species of Borreria. Therefore, D. compressus is considered as a new synonym of Borreria. The new combination Borreria diacrodonta is made and a lectotype is designated. In addition a detailed description of the species is given with illustrations, distribution map and conservation status.