Three new Pyrenula species with 3-septate ascospores with red or orange oil when over-mature (Ascomycota, Pyrenulales, Pyrenulaceae) from China

By

Dou, Mingzhu
Liu, Sheng-nan
Li, Jiechen
Aptroot, André
Jia, Zefeng

Type

Article

Date of Publication

2024

Original Publication

MycoKeys

Volume

102

Pages

107--125

Subjects

Morphology , new species , Phylogeny , Pyrenulaceae , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.102.113619

 

Abstract

The lichenised fungal genus Pyrenula is a very common crustose lichen element in tropical to subtropical forests, but little research has been done on this genus in China. During our study on Pyrenula in China, based on morphological characteristics, chemical traits and molecular phylogenetic analysis (ITS and nuLSU), three new 3-septate species with red or orange oil in over-mature ascospores were found: Pyrenula inspersasp. nov., P. thailandicoidessp. nov. and P. apiculatasp. nov. Compared to the known 3-septate species of Pyrenula with red or orange oil, P. inspersa is characterised by the inspersed hamathecium; P. thailandicoides is characterised by the IKI+ red hamathecium and the existence of an unknown lichen substance; and P. apiculata is characterised by the absence of endospore layers in the spore tips and the absence of pseudocyphellae. It is reported for the first time that the presence of a gelatinous halo around the ascospores of Pyrenula is common. A word key for the Pyrenula species with red or orange oil in over-mature ascospores is provided.