A new and endemic species of Struthanthus (Loranthaceae) from Guerrero, Mexico

Background and aims – Struthanthus is a neotropical genus with 60 to 70 species, distributed from northern Mexico to Argentina. Eighteen species are reported in Mexico. During fieldwork to investigate Struthanthus in Mexico, a new species was collected in the state of Guerrero. We present a full des...

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Published inPlant ecology and evolution Vol. 158; no. 2; pp. 195 - 204
Main Authors Maldonado-Borja, María Guadalupe, Cerros-Tlatilpa, Rosa
Format Journal Article
LanguageEnglish
Published Meise Pensoft Publishers 22.05.2025
Meise Botanic Garden
Subjects
Cloud forests
Congeners
Coniferous forests
Endemic species
Fieldwork
Flowers & plants
Forests
Fruits
Guerrero, Vicente
Identification keys
Leaves
Morphology
New species
Oak
Ovaries
Parasitic plants
Spatial analysis
Stigma
Taxonomy
Florida
Mexico
Borja Spain
Spain
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Summary:Background and aims – Struthanthus is a neotropical genus with 60 to 70 species, distributed from northern Mexico to Argentina. Eighteen species are reported in Mexico. During fieldwork to investigate Struthanthus in Mexico, a new species was collected in the state of Guerrero. We present a full description, distribution map, illustrations, and photographs of an unusual new Struthanthus species endemic to Guerrero, Mexico. Material and methods – This study is based on fieldwork, literature revision, and examination of herbarium material. Collected specimens were prepared for storage in the herbarium, analysed, measured, described, and photographed. Preliminary conservation assessment is based on spatial analyses following IUCN guidelines and criteria. Key results – We propose a new species of Struthanthus for Guerrero, Mexico, S. longipetiolatus . This species is only known from cloud forests, oak-pine forests, and oak forests in the province of Sierra Madre del Sur, in the state of Guerrero. A distribution map and an identification key are provided for S. longipetiolatus and its morphologically similar congeners in the region. Conclusion – The newly described species increases the number of Struthanthus species in Mexico to 19 and the number of endemic species to nine. This discovery underlines the need for continued botanical inventories and research on parasitic plants.
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ISSN:2032-3913
2032-3921
DOI:10.5091/plecevo.145707