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New and interesting species in the family Graphidaceae (Ascomycota: Ostropales) from Vietnam

Published online by Cambridge University Press:  30 May 2017

Santosh JOSHI ,
Dalip K. UPRETI ,
Nguyen Thi THANH ,
Anh Dong NGUYEN  and
Jae-Seoun HUR
Santosh JOSHI
Affiliation:
Lichenology Laboratory, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow (UP)-226001, India
Dalip K. UPRETI
Affiliation:
Lichenology Laboratory, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow (UP)-226001, India
Nguyen Thi THANH
Affiliation:
Biotechnology Center, Tay Nguyen University, 567 Le Duan, Buon Ma Thuot City, Vietnam
Anh Dong NGUYEN
Affiliation:
Biotechnology Center, Tay Nguyen University, 567 Le Duan, Buon Ma Thuot City, Vietnam
Jae-Seoun HUR*
Affiliation:
Korean Lichen Research Institute, Sunchon National University, Suncheon 540-742, South Korea.
*
Email: jshur1@sunchon.ac.kr
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Abstract

The lowland area of southern Vietnam contains a high diversity of corticolous, crustose lichens, particularly in the family Graphidaceae. Two species, Acanthothecis verrucosa S. Joshi, Upreti & Hur and Graphis exuta S. Joshi, Upreti & Hur, are described new to science. Acanthothecis verrucosa is characterized by a verrucose, olive green thallus containing irregular to shortly lirellate apothecia, hyaline to brownish proper exciple apically lined by robust periphysoids, muriform ascospores, 30–70 × 15–20 μm, and the presence of psoromic and subpsoromic acids. Graphis exuta is characterized by a smooth, greenish white thallus, simple lirellae lacking thalline margin, entire labia coarsely white pruinose towards slit, muriform ascospores, 20–35×10–13 μm, and norstictic acid in the thallus. A new name, Acanthothecis yokdonensis S. Joshi & Hur, is proposed here for the species Acanthothecis salazinica S. Joshi & Hur, a later homonym of A. salazinica van den Boom & Sipman. In addition, 34 species from Vietnam are newly reported. A world key to the group of Graphis species characterized by short, simple and sessile lirellae lacking or with basal thalline margins (nuda-morph) is presented.

Keywords

lichenkeysmangrovenomenclaturetaxonomytropical
Type
Articles
Information
The Lichenologist , Volume 49 , Issue 3 , May 2017 , pp. 259 - 268
Copyright
© British Lichen Society, 2017 

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