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22 April 2013 A revision of Leptogium species with spherical-celled hairs (section Mallotium p.p.)
Marcos J. Kitaura, Marcelo P. Marcelli
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The group of Leptogium species with spherical-celled hairs (i.e., sect Mallotium) is revised and identification keys for fertile and sterile specimens are provided based on morphological and anatomical characteristics. Apothecial tissues are important in species differentiation and are related to the type of columnar hyphae of the thallus. Mallotium species can be readily differentiated by the surface morphology, architecture of the hairs, the type and distribution of isidia and lobules, the columnar hyphae, and features of apothecial tissues. The thallus of L. inflexum lacks marginal lacinulae, but was retained in synonymy with L. burgessii, whereas L. ethiopicum was distinguished from L. burgessii. Leptogium nylanderi is a new name for L. inflexum var. isidiosulum. The new species L. mantiqueirense is described from southeastern Brazil.

The American Bryological and Lichenological Society, Inc.
Marcos J. Kitaura and Marcelo P. Marcelli "A revision of Leptogium species with spherical-celled hairs (section Mallotium p.p.)," The Bryologist 116(1), 15-27, (22 April 2013).
Received: 17 December 2011; Accepted: 1 December 2012; Published: 22 April 2013
Lichen taxonomy
true isidium
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