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Phylogenetics in Scyphostelma (Apocynaceae: Orthosiinae) and description of new species

Title data

Pineda, Yam M. ; Keller, Hector ; Balderrama-Torrico, Jose ; Meve, Ulrich ; Nürk, Nicolai ; Liede-Schumann, Sigrid:
Phylogenetics in Scyphostelma (Apocynaceae: Orthosiinae) and description of new species.
In: Willdenowia. Vol. 53 (2023) Issue 1/2 . - pp. 83-112.
ISSN 1868-6397

Abstract in another language

In the tropical Americas, the Orthosiinae (Apocynaceae) comprises plant species with small but intricate flowers and harbours a tremendous, still understudied diversity currently classified in four genera, Jobinia, Monsanima, Orthosia and Scypho­ stelma. In this study, we describe and illustrate four new species of Scyphostelma: S. bolivianum, S. gracile, S. rotorum and S. solo­ monii, based on specimens collected in Bolivia and Peru. Phylogenetic analysis places S. bolivianum and S. gracile in a clade with S. harlingii, a species from southern Ecuador and central Peru, together as sister clade to the rest of Scyphostelma. Due to the size of flowers and the long-filiform peduncles and pedicels, we consider the two new species S. rotorum and S. solomonii and the new combination S. erikseniae a part of the S. harlingii group, for which an identification key is presented. Furthermore, four species names are lectotypified and six new combinations in Scyphostelma are made: S. fasciculiflorum, S. jaramilloi, S. purpurascens, S. quitense, S. stenospira and S. unguiculatum.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Andes mountains; Apocynaceae; Asclepiadeae; endemism; lectotypification; Orthosiinae; phylogenetic analysis; Scy­ phostelma; South America; taxonomy
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics > Chair Plant Systematics - Univ.-Prof. Dr. Sigrid Liede-Schumann
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 570 Life sciences, biology
500 Science > 580 Plants (Botany)
Date Deposited: 18 Sep 2023 09:54
Last Modified: 18 Sep 2023 09:54