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Issue: Vol. 754 No. 1: 1 May 2026
Type: Article
Published: 2026-05-01
DOI: 10.11646/phytotaxa.754.1.2
Page range: 55-71
Abstract views: 0
PDF downloaded: 0

Perspectives on American Cheilolejeunea (Spruce) Steph. (Marchantiophyta, Lejeuneaceae) with a description of two new species and one new variety from tropical America

Universidade Federal da Bahia, Instituto de Biologia, Laboratório de Taxonomia de Briófitas – BrioFLORA, Campus Universitário de Ondina, 40170-280 Salvador, Bahia, Brazil
Bryology Laboratory, School of Life Sciences, East China Normal University, Shanghai, 200241, China
Département de Biologie, Université Laval, G1V 0A6, Québec (QC), G1V 0A6, Canada; National Institute for Amazonian Research, Biodiversity Department, Av. André Araújo, Aleixo, Caixa Postal 478, 69060001, Amazonas, Manaus, Brasil
National Institute for Amazonian Research, Biodiversity Department, Av. André Araújo, Aleixo, Caixa Postal 478, 69060001, Amazonas, Manaus, Brasil
Mittlere Letten 11, 88634 Herdwangen-Schönach, Germany
Cheilolejeuneinae Jungermanniopsida Lejeuneeae Taxonomy tropical rainforests Bryophytes

Abstract

Two new species and one new variety of the genus Cheilolejeunea are described from tropical America: Cheilolejeunea longiangulata from Amazonas (Brazil), Cheilolejeunea microstipulata from Bahia, Ceará, Pará (Brazil), and Guaviare (Colombia), and Cheilolejeunea rigidula var. granulomarginata from Bahia, Amazonas, Paraná, São Paulo (Brazil), Prov. de Alajuela (Costa Rica), and Prov. Chiriquí (Panama). Cheilolejeunea longiangulata is characterized primarily by the presence of three strongly thickened cells on the ventral margin adjacent to the lobule apex strongly thickened, and the cell at the junction with the keel presenting a large, strongly lenticular papilla. Cheilolejeunea microstipulata is a small plant with suberect to obliquely patent leaves and tiny, distant underleaves. Cheilolejeunea rigidula var. granulomarginata is a variety presenting leaf lobes with margins grainy, irregularly crenulate, leaf lobules frequently reduced, and underleaves frequently small, bifid to 1/2–2/3, suborbicular, lobes triangular-acute, margins irregularly crenulate. An identification key for Brazilian Cheilolejeunea species is presented.

References

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How to Cite

Bastos, C.J.P., Zhu, R.-L., Sierra, A.M., Zartman, C.E. & Schäfer-Verwimp, A. (2026) Perspectives on American Cheilolejeunea (Spruce) Steph. (Marchantiophyta, Lejeuneaceae) with a description of two new species and one new variety from tropical America. Phytotaxa 754 (1): 55–71. https://doi.org/10.11646/phytotaxa.754.1.2