[Botany • 2022] Pachygenium laurense (Orchidaceae: Spiranthinae) • A New Orchid Species from Argentina—Morphological Evidence and Phylogenetic Reconstruction - Hallo frends Species New to Science, thank you for visiting this blog [Botany • 2022] Pachygenium laurense (Orchidaceae: Spiranthinae) • A New Orchid Species from Argentina—Morphological Evidence and Phylogenetic Reconstruction, We have prepared this article well for you to read and take information in it. hopefully the contents of the post vidio 2022, vidio Argentina, vidio Botany, vidio CR • Critically Endangered, vidio Monocots, vidio Neotropical, vidio Neotropical Botany, vidio Orchidaceae - Orchids, vidio PeerJ, vidio Phylogenetics, vidio South America, vidio Taxonomy, vidio Toponym, what we wrote you can enjoy, send your video to metart30@gmail.com and we are very happy to publish it like the video below

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[Botany • 2022] Pachygenium laurense (Orchidaceae: Spiranthinae) • A New Orchid Species from Argentina—Morphological Evidence and Phylogenetic Reconstruction

Pachygenium laurense C.M. Martín & Szlach.,  

in Martin, Morales, Dudek & Szlachetko, 2022. 

 DOI: 10.7717/peerj.13433

photos by Claudia M. Martín

Abstract 

Background: Pachygenium 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.

Methods: Materials 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.

Results: Pachygenium 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.

Conclusion: Pachygenium laurense is the fifth species of the genus recorded from Argentina.

Pachygenium laurense C.M. Martín & Szlach., in situ.
(A) Habitat. (B) Leaves. (C) Inflorescence buds (photos by Claudia M. Martín).

Floral structures of Pachygenium laurense C.M. Martín & Szlach.
(A) (E) Inflorescence, lateral view (B) Inflorescence, top view. (C) Flower, front view. (D) Flower, lateral view

(photos by Claudia M. Martín).

Drawing of Pachygenium laurense C.M. Martín & Szlach. 
 (A) Habit. (B) Flower, lateral view. (C) Dorsal sepal. (D) Lateral sepals. (E) Petal. (F) Lip. (G) Pollinarium. (H) Gynostemium, front and back view

(drawn by Adriana M. Morales).

Pachygenium laurense C.M. Martín & Szlach. sp. nov.

Diagnosis: Species leafless at anthesis, with very characteristic arrangements of the flowers in inflorescence, ecallose, undivided lip, and narrow, slender gynostemium.

Etymology: The name of the species refers to the place where it was collected for the first time (Estancia Las Lauras).

Pachygenium gutturosa (Rchb.f.) Szlach., Dudek & C.M. Martín, comb. nov. 

 Claudia M. Martin, Adriana Marisel Morales, Magdalena Dudek and Dariusz L. Szlachetko. 2022. Pachygenium laurense (Orchidaceae, Spiranthinae), A New Orchid Species from Argentina—Morphological Evidence and Phylogenetic Reconstruction. PeerJ. 10:e13433 . DOI: 10.7717/peerj.13433

  

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