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Issue: Vol. 594 No. 2: 26 April 2023
Type: Article
Published: 2023-04-26
DOI: 10.11646/phytotaxa.594.2.1
Page range: 89-104
Abstract views: 97
PDF downloaded: 4

Catasetum × grasineideae (Orchidaceae: Catasetinae), a new nothospecies from Brazilian Amazon and taxonomic notes for the genus

Universidade Federal do Amapá, Programa de Pós-Graduação em Biodiversidade e Biotecnologia da Rede BIONORTE, Rodovia Josmar Chaves Pinto, Km 2, Jardim Marco Zero, 68903-419, Macapá, AP, Brazil.
Program of Forest Ecology and Management, Albert Ludwig University of Freiburg, Friedrichstr. 39, 79098, Freiburg, Germany.
Université de Lyon 1, Herbiers, F-69622, Villeurbanne Cedex, France.
Mineração Rio do Norte, Rua Rio Jari s/n°, 68275-000, Porto Trombetas, Oriximiná, PA, Brazil.
Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Botânica, Departamento de Botânica, Av. André Araújo, 2936, Aleixo, 69060-001, Manaus, AM, Brazil.
Instituto de Pesquisas Científicas e Tecnológicas do Estado do Amapá, Laboratório de Taxonomia Vegetal, Rodovia Juscelino Kubitschek, Km 10, 68903-970, Macapá, AP, Brazil.
Amazon Catasetum gnomus Catasetum saccatum Catasetinae natural hybrid Igapó Monocots

Abstract

Hybridization is a process that can occur randomly in nature between different genetically compatible species, as is observed within the genus Catasetum. Thus, this work proposes the description of a new nothospecies found in the lake of Castanho located in the municipality of Careiro Castanho. It is described, illustrated and compared with its parental species: C. gnomus and C. saccatum. In addition, information regarding the distribution, habitat and phenology as well as a key to the natural hybrids occurring in the Brazilian state of Amazonas are presented. Taxonomic notes are presented for five taxa of the genus currently treated as species that, after performing controlled pollination and germination in vitro, have proven to be in reality natural hybrids. Finally, we propose to place C. sanguineum into the synonymy of C. naso.

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