Pachygenium laurense (Orchidaceae, Spiranthinae), a new orchid species from Argentina—morphological evidence and phylogenetic reconstruction

PeerJ

article

Claudia M. Martin¹  Adriana Marisel Morales²  Magdalena Dudek³  Dariusz L. Szlachetko³ 

[1] Facultad de Ciencias Agrarias, Universidad Nacional de Jujuy;Instituto de Ecorregiones Andinas ,(CONICET-UNJu), Universidad Nacional de Jujuy;Department of Plant Taxonomy and Nature Conservation, University of Gdansk

关键词: Argentina;    Field study;    Morphology;    New species;    Orchidaceae;    Phylogenetic analyses;    Pachygenium;   

DOI  :  10.7717/peerj.13433

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundPachygenium embraces a group of terrestrial species formerly placed in Pelexia sensu lato. The genus currently comprises some 60 species, most of which are known from the southern parts of Brazil and Paraguay, with few species distributed in the Andean countries—only four species have been recorded from Argentina so far. In Jujuy Province, Argentina a new species of Pachygenium was found during our fieldwork. The aim of this article was to provide morphological and molecular evidence for its membership in this genus.MethodsMaterials from specimens were collected in the field and examined by classical taxonomic and molecular biological techniques, e.g., PCR and sequencing DNA. Phylogenetic reconstruction was performed by maximum-likelihood and Bayesian inference.ResultsPachygenium laurense from Argentina is described and illustrated based on morphological evidence and its taxonomic position was confirmed by phylogenetic analyses. A new combination for Pachygenium gutturosa is also proposed. A key for identification is provided for the Pachygenium species occurring in Argentina.ConclusionPachygenium laurense is the fifth species of the genus recorded from Argentina.

【 授权许可】

CC BY