A new species of Bonnetia Mart. (Bonnetiaceae) from the Pantepui of South America

By

Gomes Barbosa-Silva, Rafael
Torke, Benjamin
Viana, Pedro Lage

Type

Article

Date of Publication

2024

Original Publication

PhytoKeys

Volume

247

Pages

55--65

Subjects

Amazonia , endemism , floristic inventory , Guayana Shield , Herbarium , Malpighiales

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.247.126950

 

Abstract

Bonnetia is the most representative genus of the Pantepui woody flora and is among the groups with the greatest endemism in the local flora. The genus has 28 currently recognized species in tropical America, 26 of them endemic to the Pantepui. Here we describe Bonnetia ayangannensis from the summit of Mount Ayanganna tepui in Guyana, providing a morphological description, illustrations, distribution maps, characterization of micromorphology under scanning electron microscopy and leaf venation, comments comparing the new species with closely related species, and a key for the identification of the species of Bonnetia occurring in Guyana. With its restricted distribution threatened by climate change, Bonnetia ayangannensis is assessed in the conservation threat category of Critically Endangered. Its description raises the number of endemic species of Bonnetia in the Pantepui to 27.